> For the complete documentation index, see [llms.txt](/llms.txt).
[◆ miniwebtool /api](/)
[Tools](/tools/) [Docs](/docs/) [Reference](/v1/docs) [Pricing](/#pricing) [Log in](/dashboard/login/) [Start free](/billing/checkout/?plan=free)

# API catalog

440 JSON endpoints across 23 categories. Compare schemas, credit cost, examples, and plan access before adding a tool to your app, site, workflow, or agent. Type / to search. Click any tool for its schema, credit cost, and copy-paste snippets.
Build less utility code
Use hosted formulas, validators, examples, and response envelopes instead of maintaining one-off helpers.
Match SEO intent faster
Add calculator and utility features behind pages people already search for, with docs ready for developers and agents.
Keep pricing predictable
Every endpoint has a published credit weight, one bearer token, and one monthly credit pool.
🔎 /
Finance 93 Text 26 Hash & Checksum 6 Math 207 Random 12 Webmaster 8 Color 3 Construction 5 Conversion 1 Converters 1 Cooking 8 Craft 1 Datetime 1 Dev 5 Developer 6 Electronics 4 Engineering 1 Marketing 1 Miscellaneous 3 Physics 1 Science 29 Sports 11 Time-Date 7
No tools match that search. [Clear filter](/tools/) or [request one →](mailto:support@miniwebtool.com)

## [Finance](/tools/category/finance/) 93 endpoints [Full page →](/tools/category/finance/)

Exact interest, mortgage, APY, and other money math.
Auto
[
Car Depreciation Calculator car-depreciation-calculator
Estimate vehicle depreciation using a declining-balance annual rate.
2cr
](/tools/car-depreciation-calculator/) [
Car Lease Calculator car-lease-calculator
Estimate monthly auto lease payment from cap cost, residual value, money factor, tax, and fees.
2cr
](/tools/car-lease-calculator/)
Bonds
[
Bond Equivalent Yield Calculator bond-equivalent-yield-calculator
Calculate bond equivalent yield for a discount security.
2cr
](/tools/bond-equivalent-yield-calculator/) [
Zero Coupon Bond Calculator zero-coupon-bond-calculator
Calculate zero coupon bond price or yield to maturity.
2cr
](/tools/zero-coupon-bond-calculator/)
Credit
[
Credit Card Interest Calculator credit-card-interest-calculator
Estimate credit card payoff time, interest cost, and payment strategy savings.
2cr
](/tools/credit-card-interest-calculator/)
Debt
[
Debt Coverage Ratio Calculator debt-coverage-ratio-calculator
Calculate debt service coverage ratio from NOI and debt service, or build NOI from property inputs.
2cr
](/tools/debt-coverage-ratio-calculator/) [
Debt to Income Ratio Calculator debt-to-income-ratio-calculator
Calculate debt-to-income ratio from monthly income and debt payments.
2cr
](/tools/debt-to-income-ratio-calculator/) [
Fixed Charge Coverage Ratio Calculator fixed-charge-coverage-ratio-calculator
Calculate fixed charge coverage ratio with optional EBITDA and principal-payment adjustments.
2cr
](/tools/fixed-charge-coverage-ratio-calculator/) [
Interest Coverage Ratio Calculator interest-coverage-ratio-calculator
Calculate EBIT or EBITDA based interest coverage ratio.
2cr
](/tools/interest-coverage-ratio-calculator/) [
Times Interest Earned Ratio Calculator times-interest-earned-ratio-calculator
Calculate times interest earned ratio and interest coverage safety margin.
2cr
](/tools/times-interest-earned-ratio-calculator/)
Depreciation
[
Actual Cash Value Calculator actual-cash-value-calculator
Calculate actual cash value from replacement cost, age, lifespan, salvage, and depreciation method.
1cr
](/tools/actual-cash-value-calculator/)
Discounts
[
Discount Calculator discount-calculator
Calculate final price, savings, tax, stacked discounts, or BOGO deals.
1cr
](/tools/discount-calculator/) [
Percent Off Calculator percent-off-calculator
Calculate discount amount and sale price from original price and percent off.
1cr
](/tools/percent-off-calculator/)
Efficiency
[
Average Collection Period Calculator average-collection-period-calculator
Calculate average collection period, receivables turnover, and industry benchmark spread.
2cr
](/tools/average-collection-period-calculator/) [
Debtor Days Calculator debtor-days-calculator
Calculate debtor days, receivables ratio, and working capital above a 30-day target.
2cr
](/tools/debtor-days-calculator/) [
Fixed Asset Turnover Calculator fixed-asset-turnover-calculator
Measure revenue generated per dollar of net fixed assets.
2cr
](/tools/fixed-asset-turnover-calculator/) [
Inventory Turnover Calculator inventory-turnover-calculator
Calculate inventory turnover, days sales in inventory, and annualized turnover.
2cr
](/tools/inventory-turnover-calculator/) [
Receivables Turnover Ratio Calculator receivables-turnover-ratio-calculator
Calculate receivables turnover and days sales outstanding.
2cr
](/tools/receivables-turnover-ratio-calculator/) [
Total Asset Turnover Calculator total-asset-turnover-calculator
Measure revenue generated per dollar of average total assets.
2cr
](/tools/total-asset-turnover-calculator/)
Financial Ratio
[
Goodwill to Assets Ratio Calculator goodwill-to-assets-ratio-calculator
Calculate goodwill-to-assets ratio and tangible asset share.
2cr
](/tools/goodwill-to-assets-ratio-calculator/) [
Retention Ratio Calculator retention-ratio-calculator
Calculate retention ratio, payout ratio, and retained earnings.
2cr
](/tools/retention-ratio-calculator/)
Interest
[
APR Calculator apr-calculator
Calculate true APR from loan amount, rolled-in fees, nominal rate, and term.
2cr
](/tools/apr-calculator/) [
APR to APY Calculator apr-to-apy-calculator
Convert APR to APY for a selected compounding frequency.
2cr
](/tools/apr-to-apy-calculator/) [
APY Calculator apy-calculator
Calculate annual percentage yield and compound growth.
2cr
](/tools/apy-calculator/) [
APY to APR Calculator apy-to-apr-calculator
Convert APY back to nominal APR for a compounding frequency.
2cr
](/tools/apy-to-apr-calculator/) [
Compound Interest Calculator compound-interest-calculator
Compound-interest formula with selectable compounding frequency.
2cr
](/tools/compound-interest-calculator/) [
Continuous Compounding Calculator continuous-compounding-calculator
Calculate future value and interest with continuous compounding.
1cr
](/tools/continuous-compounding-calculator/) [
Doubling Time Calculator doubling-time-calculator
Calculate exact doubling time, Rule of 72 estimates, or the rate required to double.
1cr
](/tools/doubling-time-calculator/) [
Effective Interest Rate Calculator effective-interest-rate-calculator
Convert a nominal interest rate to its effective annual rate.
2cr
](/tools/effective-interest-rate-calculator/) [
Effective Yield Calculator effective-yield-calculator
Calculate effective annual yield from nominal APR and compounding frequency.
2cr
](/tools/effective-yield-calculator/) [
Interest Rate Calculator interest-rate-calculator
Solve the implied annual interest rate from principal, term, and monthly payment.
2cr
](/tools/interest-rate-calculator/) [
Nominal Interest Rate Calculator nominal-interest-rate-calculator
Convert an effective annual rate to a nominal annual rate.
2cr
](/tools/nominal-interest-rate-calculator/) [
Simple Interest Calculator simple-interest-calculator
Simple-interest formula: I = P * r * t.
2cr
](/tools/simple-interest-calculator/)
Investing
[
Stock Profit Loss Calculator stock-profit-loss-calculator
Calculate stock trade profit, loss, ROI, and breakeven price.
2cr
](/tools/stock-profit-loss-calculator/)
Investment
[
Capital Employed Calculator capital-employed-calculator
Calculate capital employed by common balance-sheet methods and optional ROCE.
2cr
](/tools/capital-employed-calculator/)
Leverage
[
Debt to Asset Ratio Calculator debt-to-asset-ratio-calculator
Calculate debt-to-asset ratio, equity ratio, and optional industry benchmark spread.
2cr
](/tools/debt-to-asset-ratio-calculator/) [
Debt to Equity Ratio Calculator debt-to-equity-ratio-calculator
Calculate debt-to-equity ratio, equity multiplier, and capital structure shares.
2cr
](/tools/debt-to-equity-ratio-calculator/) [
Equity Ratio Calculator equity-ratio-calculator
Calculate equity ratio, debt ratio, equity multiplier, and industry benchmark spread.
2cr
](/tools/equity-ratio-calculator/)
Liquidity
[
Cash Ratio Calculator cash-ratio-calculator
Calculate cash ratio from cash, marketable securities, and current liabilities.
2cr
](/tools/cash-ratio-calculator/) [
Current Ratio Calculator current-ratio-calculator
Calculate current ratio and working capital from current assets and liabilities.
2cr
](/tools/current-ratio-calculator/) [
Loan to Deposit Ratio Calculator loan-to-deposit-ratio-calculator
Calculate bank loan-to-deposit ratio, deposit coverage, and liquidity status.
2cr
](/tools/loan-to-deposit-ratio-calculator/) [
Quick Ratio Calculator quick-ratio-calculator
Calculate quick ratio, quick assets, current ratio, and liquidity rating.
2cr
](/tools/quick-ratio-calculator/)
Loans
[
Auto Loan Calculator auto-loan-calculator
Calculate auto loan amount, monthly payment, tax, and total interest.
2cr
](/tools/auto-loan-calculator/) [
Business Loan Calculator business-loan-calculator
Estimate business loan payments, fees, payoff time, and interest.
2cr
](/tools/business-loan-calculator/) [
Car Loan Payoff Calculator car-loan-payoff-calculator
Compare standard and accelerated payoff for a car loan.
2cr
](/tools/car-loan-payoff-calculator/) [
Down Payment Calculator down-payment-calculator
Estimate mortgage down payment, loan amount, monthly payment, PMI, and comparison scenarios.
2cr
](/tools/down-payment-calculator/) [
EMI Calculator emi-calculator
Calculate equated monthly installment and total interest for a loan.
2cr
](/tools/emi-calculator/) [
Loan Payoff Calculator loan-payoff-calculator
Calculate loan payoff months and savings from extra monthly payments.
2cr
](/tools/loan-payoff-calculator/) [
Mortgage Calculator mortgage-calculator
Monthly payment, total interest, LTV, and optional amortization schedule.
5cr
](/tools/mortgage-calculator/) [
Personal Loan Calculator personal-loan-calculator
Calculate personal loan payment, payoff time, interest, and extra-payment savings.
2cr
](/tools/personal-loan-calculator/)
Marketing
[
ROAS Calculator roas-calculator
Calculate return on ad spend, profit, ROI, or target revenue.
2cr
](/tools/roas-calculator/)
Profit
[
Break-Even Calculator break-even-calculator
Calculate break-even units, revenue, contribution margin, and target-profit units.
1cr
](/tools/break-even-calculator/) [
EBIT Calculator ebit-calculator
Calculate EBIT and EBIT margin from revenue, expenses, and non-operating income.
2cr
](/tools/ebit-calculator/) [
EBITDA Calculator ebitda-calculator
Calculate EBITDA using net income or operating income inputs.
2cr
](/tools/ebitda-calculator/)
Profitability
[
Cash Flow Margin Calculator cash-flow-margin-calculator
Calculate operating cash flow margin as a percentage of net sales.
2cr
](/tools/cash-flow-margin-calculator/) [
Earnings per Share Calculator earnings-per-share-calculator
Calculate basic, diluted, or weighted earnings per share.
2cr
](/tools/earnings-per-share-calculator/) [
EBIT Margin Calculator ebit-margin-calculator
Calculate EBIT margin and EBIT-to-revenue ratio.
2cr
](/tools/ebit-margin-calculator/) [
EBITDA Margin Calculator ebitda-margin-calculator
Calculate EBITDA margin from direct EBITDA or component inputs.
2cr
](/tools/ebitda-margin-calculator/) [
Gross Profit Margin Calculator gross-profit-margin-calculator
Calculate gross profit, gross margin, markup, and cost ratio.
2cr
](/tools/gross-profit-margin-calculator/) [
Net Profit Margin Calculator net-profit-margin-calculator
Calculate net profit margin and profit per revenue dollar.
2cr
](/tools/net-profit-margin-calculator/) [
Operating Margin Calculator operating-margin-calculator
Calculate operating margin from operating income or detailed operating components.
2cr
](/tools/operating-margin-calculator/) [
Profit Calculator profit-calculator
Solve profit, margin, markup, revenue, or cost from the known values.
2cr
](/tools/profit-calculator/) [
Profit to Sales Ratio Calculator profit-to-sales-ratio-calculator
Calculate profit-to-sales ratio and compare it with an industry benchmark.
2cr
](/tools/profit-to-sales-ratio-calculator/) [
Return on Assets Ratio Calculator return-on-assets-ratio-calculator
Calculate ROA with optional DuPont margin and asset-turnover breakdown.
2cr
](/tools/return-on-assets-ratio-calculator/) [
Return On Equity Calculator return-on-equity-calculator
Calculate ROE with optional 3- or 5-component DuPont analysis.
2cr
](/tools/return-on-equity-calculator/) [
Return On Sales Calculator return-on-sales-calculator
Calculate return on sales, operating cost ratio, and ROS decimal.
2cr
](/tools/return-on-sales-calculator/)
Real Estate
[
Capitalization Rate Calculator capitalization-rate-calculator
Solve cap rate, property value, or required NOI for real estate income analysis.
2cr
](/tools/capitalization-rate-calculator/) [
Gross Rent Multiplier Calculator gross-rent-multiplier-calculator
Calculate gross rent multiplier and rental yield for a property.
2cr
](/tools/gross-rent-multiplier-calculator/) [
Home Equity Calculator home-equity-calculator
Calculate home equity, LTV, CLTV, and optional five-year equity projection.
2cr
](/tools/home-equity-calculator/) [
Moving Cost Estimator moving-cost-estimator
Estimate moving costs from home size, distance, service level, and access factors.
2cr
](/tools/moving-cost-estimator/)
Retail
[
Markup Calculator markup-calculator
Calculate markup percentage, selling price, cost, profit, and margin.
1cr
](/tools/markup-calculator/)
Return
[
Dividend Payout Ratio Calculator dividend-payout-ratio-calculator
Calculate dividend payout ratio and retention ratio from total or per-share inputs.
2cr
](/tools/dividend-payout-ratio-calculator/) [
Dividend Yield Calculator dividend-yield-calculator
Calculate dividend yield, per-payment dividend, and optional annual income.
2cr
](/tools/dividend-yield-calculator/) [
ROI Calculator roi-calculator
Calculate ROI, annualized ROI, CAGR, and investment term from fixed dates.
2cr
](/tools/roi-calculator/)
Salary
[
Hourly to Salary Calculator hourly-to-salary-calculator
Convert an hourly wage to weekly, monthly, and annual salary.
2cr
](/tools/hourly-to-salary-calculator/) [
Hourly Wage Calculator hourly-wage-calculator
Convert annual salary to equivalent hourly wage.
2cr
](/tools/hourly-wage-calculator/) [
Salary Conversion Calculator salary-conversion-calculator
Convert wage amounts across hourly, daily, weekly, monthly, and annual pay periods.
2cr
](/tools/salary-conversion-calculator/) [
Weekly Wage Calculator weekly-wage-calculator
Convert annual salary to weekly wage.
2cr
](/tools/weekly-wage-calculator/)
Sales
[
Commission Calculator commission-calculator
Calculate flat, tiered, or bonus-based sales commission.
2cr
](/tools/commission-calculator/)
Savings
[
Compound Savings Calculator compound-savings-calculator
Project savings growth with compound interest and regular contributions.
1cr
](/tools/compound-savings-calculator/)
TVM
[
Future Value Calculator future-value-calculator
Calculate future value from a lump sum plus optional recurring contributions.
2cr
](/tools/future-value-calculator/) [
Future Value Factor Calculator future-value-factor-calculator
Calculate the future value factor for a rate and number of periods.
2cr
](/tools/future-value-factor-calculator/) [
Future Value of Annuity Calculator future-value-of-annuity-calculator
Calculate future value for ordinary annuities and annuities due.
2cr
](/tools/future-value-of-annuity-calculator/) [
Future Value of Annuity Due Calculator future-value-of-annuity-due-calculator
Calculate future value of an annuity due and compare it with an ordinary annuity.
2cr
](/tools/future-value-of-annuity-due-calculator/) [
Future Value of Growing Annuity Calculator future-value-of-growing-annuity-calculator
Calculate future value for payments that grow each period.
2cr
](/tools/future-value-of-growing-annuity-calculator/) [
Future Value of Lump Sum Calculator future-value-of-lump-sum-calculator
Calculate compound future value for a single lump-sum investment.
2cr
](/tools/future-value-of-lump-sum-calculator/) [
FVIFA Calculator fvifa-calculator
Calculate the future value interest factor of an annuity.
2cr
](/tools/fvifa-calculator/) [
Present Value of Annuity Calculator present-value-of-annuity-calculator
Calculate present value for ordinary annuities and annuities due.
2cr
](/tools/present-value-of-annuity-calculator/) [
Present Value of Lump Sum Calculator present-value-of-lump-sum-calculator
Discount a future lump sum back to present value.
2cr
](/tools/present-value-of-lump-sum-calculator/)
Tax
[
VAT Calculator vat-calculator
Add, remove, or extract VAT from an amount using a preset or custom rate.
2cr
](/tools/vat-calculator/)
Valuation
[
Book Value per Share Calculator book-value-per-share-calculator
Calculate book value per share, common equity, and optional price-to-book ratio.
2cr
](/tools/book-value-per-share-calculator/) [
P/E Ratio Calculator p-e-ratio-calculator
Calculate price-to-earnings ratio, earnings yield, and sector benchmark premium.
2cr
](/tools/p-e-ratio-calculator/) [
Price to Book Ratio Calculator price-to-book-ratio-calculator
Calculate price-to-book ratio and compare it to industry benchmark ranges.
2cr
](/tools/price-to-book-ratio-calculator/)

## [Text](/tools/category/text/) 26 endpoints [Full page →](/tools/category/text/)

Word / character / line counters, whitespace, case, encoding.
Analysis
[
Character Counter character-counter
Count characters, letters, digits, whitespace, and punctuation.
1cr
](/tools/character-counter/) [
Compare Two Strings compare-two-strings
Compare two strings with equality, similarity, edit distance, and diff statistics.
1cr
](/tools/compare-two-strings/) [
Find Longest Line find-longest-line
Rank text lines by character, word, or byte length and return the longest lines.
1cr
](/tools/find-longest-line/) [
Line Counter line-counter
Count total / non-empty / empty lines and longest-line length.
1cr
](/tools/line-counter/) [
Sentence Counter sentence-counter
Count sentences and classify sentence type and basic complexity.
1cr
](/tools/sentence-counter/) [
Word Counter word-counter
Count words, characters, sentences, paragraphs, reading/speaking time, top words.
1cr
](/tools/word-counter/)
CSS
[
CSS Beautifier css-beautifier
Format compact CSS with indentation and line breaks.
1cr
](/tools/css-beautifier/)
Case
[
Text Case Converter lowercase-uppercase-letters
Convert text to uppercase, lowercase, title, sentence, camel, snake, kebab, and related cases.
1cr
](/tools/lowercase-uppercase-letters/) [
Title Case Converter title-case-converter
Convert text to title case using smart, APA, Chicago, MLA, AP, or simple capitalization rules.
1cr
](/tools/title-case-converter/)
Deduplication
[
Remove Duplicate Lines remove-duplicate-lines
Remove duplicate text lines while keeping first, last, or only unique occurrences.
1cr
](/tools/remove-duplicate-lines/)
Modification
[
Add Line Numbers add-line-numbers
Add configurable line numbers to the start or end of each text line.
1cr
](/tools/add-line-numbers/) [
Add Prefix and Suffix add-prefix-and-suffix
Add prefix, suffix, and optional numbering to each text line, word, or delimited item.
1cr
](/tools/add-prefix-and-suffix/) [
Remove Accent remove-accent
Remove accents and combining marks from Unicode text.
1cr
](/tools/remove-accent/) [
Remove Line Numbers remove-line-numbers
Strip numeric prefixes such as line numbers from each line of text.
1cr
](/tools/remove-line-numbers/) [
Remove Lines Containing remove-lines-containing
Keep or remove lines matching a text, word, prefix, suffix, or regex pattern.
1cr
](/tools/remove-lines-containing/) [
Remove Punctuation remove-punctuation
Remove or replace selected punctuation categories from text.
1cr
](/tools/remove-punctuation/) [
Reverse Text reverse-text
Reverse whole text, word order, each word, or line order.
1cr
](/tools/reverse-text/)
Sorting
[
Sort Lines Alphabetically sort-lines-alphabetically
Sort text lines alphabetically, naturally, numerically, or by length.
1cr
](/tools/sort-lines-alphabetically/)
Subtitles
[
CSV to SRT Converter csv-to-srt
Convert CSV subtitle rows with start, end, and text columns to SRT.
1cr
](/tools/csv-to-srt/)
Text Conversion
[
Word to Phone Number Converter word-to-phone-number-converter
Convert words and phrases into T9 keypad phone numbers.
1cr
](/tools/word-to-phone-number-converter/)
Text Modification
[
Text Repeat text-repeat
Repeat text multiple times with separators, numbering, and case options.
1cr
](/tools/text-repeat/) [
Upside Down Text Generator upside-down-text-generator
Flip text upside down using Unicode character mappings.
1cr
](/tools/upside-down-text-generator/)
Text Statistics
[
Word Frequency Analyzer word-frequency-analyzer
Analyze word frequency, unique words, lexical diversity, and CSV output.
1cr
](/tools/word-frequency-analyzer/)
Whitespace
[
Remove Empty Lines remove-empty-lines
Remove blank or whitespace-only lines from text and report line reduction statistics.
1cr
](/tools/remove-empty-lines/) [
Remove Leading Trailing Spaces remove-leading-trailing-spaces
Trim leading and trailing spaces or tabs from each line.
1cr
](/tools/remove-leading-trailing-spaces/) [
Remove Spaces remove-spaces
Strip whitespace: all, extra, leading, trailing, or per-line.
1cr
](/tools/remove-spaces/)

## [Hash & Checksum](/tools/category/hash/) 6 endpoints [Full page →](/tools/category/hash/)

SHA, MD5, HMAC, and digest utilities with stable JSON output.
[
BLAKE2b Hash Generator blake2b-hash-generator
Generate a BLAKE2b digest with 256, 384, or 512-bit output.
1cr
](/tools/blake2b-hash-generator/) [
MD5 Hash Generator md5-hash-generator
Generate an MD5 hex digest for checksum and legacy compatibility.
1cr
](/tools/md5-hash-generator/) [
SHA-256 Hash Generator sha256-hash-generator
Generate a SHA-256 hex digest of a UTF-8 string.
1cr
](/tools/sha256-hash-generator/) [
SHA3-512 Hash Generator sha3-512-hash-generator
Generate a SHA3-512 hex digest of a UTF-8 string.
1cr
](/tools/sha3-512-hash-generator/) [
SHA-384 Hash Generator sha384-hash-generator
Generate a SHA-384 hex digest of a UTF-8 string.
1cr
](/tools/sha384-hash-generator/) [
SHA-512 Hash Generator sha512-hash-generator
Generate a SHA-512 hex digest of a UTF-8 string.
1cr
](/tools/sha512-hash-generator/)

## [Math](/tools/category/math/) 207 endpoints [Full page →](/tools/category/math/)

Percentage, unit conversion, geometry, and sequences.
Advanced
[
Complementary Error Function Calculator complementary-error-function-calculator
Calculate erf(x), erfc(x), and related error-function values.
1cr
](/tools/complementary-error-function-calculator/) [
Exponential Decay Calculator exponential-decay-calculator
Solve continuous exponential decay equations for final amount, initial amount, rate, or time.
1cr
](/tools/exponential-decay-calculator/) [
Exponential Growth Calculator exponential-growth-calculator
Solve continuous exponential growth equations for final amount, initial amount, rate, or time.
1cr
](/tools/exponential-growth-calculator/)
Advanced Math
[
Antilog Calculator antilog-calculator
Calculate an antilogarithm as base raised to an exponent.
1cr
](/tools/antilog-calculator/)
Algebra
[
Absolute Value Equation Solver absolute-value-equation-solver
Solve equations of the form |a*x + b| = c.
1cr
](/tools/absolute-value-equation-solver/) [
Absolute Value Inequality Solver absolute-value-inequality-solver
Solve inequalities of the form |a*x + b| compared with c.
1cr
](/tools/absolute-value-inequality-solver/) [
Completing the Square Calculator completing-the-square-calculator
Convert a quadratic to vertex form and solve by completing the square.
1cr
](/tools/completing-the-square-calculator/) [
Cubic Equation Solver cubic-equation-solver
Solve ax^3 + bx^2 + cx + d = 0 and return all real or complex roots.
1cr
](/tools/cubic-equation-solver/) [
Slope Intercept Form Calculator slope-intercept-form-calculator
Build slope-intercept and standard-form line equations from m and b.
1cr
](/tools/slope-intercept-form-calculator/) [
Square Root Calculator square-root-calculator
Calculate the principal and negative square roots of a non-negative number.
1cr
](/tools/square-root-calculator/) [
X and Y Intercept Calculator x-y-intercept-calculator
Find x- and y-intercepts for a linear equation ax + by + c = 0.
1cr
](/tools/x-y-intercept-calculator/)
Angles
[
Radian to Degree Converter radian-to-degree-converter
Convert radians, fractions, or pi expressions to degrees.
1cr
](/tools/radian-to-degree-converter/)
Area
[
Acreage Calculator acreage-calculator
Calculate land acreage from rectangle, triangle, or circle dimensions.
1cr
](/tools/acreage-calculator/) [
Hectares to Acres Converter hectares-to-acres-converter
Convert hectares to acres and related land-area units.
1cr
](/tools/hectares-to-acres-converter/) [
Square Feet to Acres Converter square-feet-to-acres-converter
Convert square feet to acres and related land-area units.
1cr
](/tools/square-feet-to-acres-converter/) [
Square Footage Calculator square-footage-calculator
Calculate square footage for common room, lot, and curved shapes.
1cr
](/tools/square-footage-calculator/) [
Square Meters to Acres Converter square-meters-to-acres-converter
Convert square meters to acres and related land-area units.
1cr
](/tools/square-meters-to-acres-converter/) [
Square Miles to Acres Converter square-miles-to-acres-converter
Convert square miles to acres and related land-area units.
1cr
](/tools/square-miles-to-acres-converter/)
Basic Math
[
Absolute Value Calculator absolute-value-calculator
Calculate the absolute value of a real or complex number.
1cr
](/tools/absolute-value-calculator/) [
Cube and Cube Root Calculator cube-and-cube-root-calculator
Calculate a number's cube and cube root.
1cr
](/tools/cube-and-cube-root-calculator/) [
Cube Root Calculator cube-root-calculator
Calculate the real cube root of a finite number.
1cr
](/tools/cube-root-calculator/) [
Even or Odd Number Checker even-or-odd-number-checker
Check whether one or more integers are even or odd.
1cr
](/tools/even-or-odd-number-checker/)
Combinatorics
[
Binomial Coefficient Calculator binomial-coefficient-calculator
Calculate C(n, k), the number of combinations choosing k items from n.
1cr
](/tools/binomial-coefficient-calculator/) [
Combination Calculator combination-calculator
Calculate combinations C(n, k).
1cr
](/tools/combination-calculator/)
Complex Numbers
[
Complex Numbers Calculator complex-numbers-calculator
Add, subtract, multiply, or divide two complex numbers.
1cr
](/tools/complex-numbers-calculator/)
Conics
[
Hyperbola Calculator hyperbola-calculator
Calculate standard-form hyperbola vertices, foci, eccentricity, and asymptotes.
1cr
](/tools/hyperbola-calculator/)
Construction
[
Flooring Calculator flooring-calculator
Estimate flooring material units, waste allowance, and optional cost.
1cr
](/tools/flooring-calculator/) [
Insulation Calculator insulation-calculator
Estimate insulation R-value target, thickness, material quantity, and cost range.
1cr
](/tools/insulation-calculator/)
Cooking
[
Butter to Oil Converter butter-to-oil-converter
Convert butter quantities to practical oil equivalents for baking.
1cr
](/tools/butter-to-oil-converter/)
Education
[
Final Grade Calculator final-grade-calculator
Calculate the final exam score needed to reach a target course grade.
1cr
](/tools/final-grade-calculator/)
Electronics
[
LED Resistor Calculator led-resistor-calculator
Calculate LED current-limiting resistor values and power ratings.
1cr
](/tools/led-resistor-calculator/)
Exponents
[
Half Life Calculator half-life-calculator
Solve exponential decay for remaining amount, initial amount, elapsed time, or half-life.
1cr
](/tools/half-life-calculator/)
Fractions
[
Comparing Fractions Calculator comparing-fractions-calculator
Compare two fractions or mixed numbers using a common denominator.
1cr
](/tools/comparing-fractions-calculator/) [
Decimal to Fraction Calculator decimal-to-fraction-calculator
Convert a decimal or parenthesized repeating decimal to a fraction.
1cr
](/tools/decimal-to-fraction-calculator/) [
Equivalent Fractions Calculator equivalent-fractions-calculator
Generate equivalent fractions or check whether two fractions are equivalent.
1cr
](/tools/equivalent-fractions-calculator/) [
Fraction Simplifier fraction-simplifier
Reduce a fraction to lowest terms and return GCF, mixed number, decimal, percentage, and equivalents.
1cr
](/tools/fraction-simplifier/) [
Fraction to Decimal Calculator fraction-to-decimal-calculator
Convert proper, improper, or mixed fractions to decimals and detect repeating decimal patterns.
1cr
](/tools/fraction-to-decimal-calculator/) [
Fraction to Mixed Number Converter fraction-to-mixed-number-converter
Convert an improper fraction to a simplified mixed number.
1cr
](/tools/fraction-to-mixed-number-converter/) [
Fraction to Percent Converter fraction-to-percent-converter
Convert proper, improper, or mixed fractions to percentages with configurable decimal places.
1cr
](/tools/fraction-to-percent-converter/)
Functions
[
Hyperbolic Functions Calculator hyperbolic-functions-calculator
Calculate sinh, cosh, tanh and reciprocal hyperbolic functions.
1cr
](/tools/hyperbolic-functions-calculator/)
Games
[
DPS Calculator dps-calculator
Calculate raw, sustained, critical-hit, and headshot damage per second.
1cr
](/tools/dps-calculator/)
Geometry
[
3D Distance Calculator 3d-distance-calculator
Calculate 3D Euclidean distance, midpoint, direction cosines, and related distances.
1cr
](/tools/3d-distance-calculator/) [
Angle Bisector Calculator angle-bisector-calculator
Calculate triangle angle bisectors, angles, area, and inradius from side lengths.
1cr
](/tools/angle-bisector-calculator/) [
Arc Length Calculator arc-length-calculator
Solve arc length, radius, or central angle for a circle sector.
1cr
](/tools/arc-length-calculator/) [
Area of a Circle Calculator area-of-a-circle-calculator
Calculate circle radius, diameter, circumference, and area from one value.
1cr
](/tools/area-of-a-circle-calculator/) [
Area of a Parallelogram Calculator area-of-a-parallelogram-calculator
Find parallelogram area from base-height, sides-angle, or diagonals-angle inputs.
1cr
](/tools/area-of-a-parallelogram-calculator/) [
Area of a Sector Calculator area-of-a-sector-calculator
Calculate sector area, arc length, perimeter, chord, and segment area.
1cr
](/tools/area-of-a-sector-calculator/) [
Area of a Trapezoid Calculator area-of-a-trapezoid-calculator
Calculate trapezoid area from two parallel bases and height.
1cr
](/tools/area-of-a-trapezoid-calculator/) [
Area of an Ellipse Calculator area-of-an-ellipse-calculator
Calculate ellipse area, Ramanujan perimeter, foci, and eccentricity.
1cr
](/tools/area-of-an-ellipse-calculator/) [
Area of Equilateral Triangle Calculator area-of-equilateral-triangle-calculator
Calculate equilateral-triangle side, area, height, perimeter, and radii.
1cr
](/tools/area-of-equilateral-triangle-calculator/) [
Cartesian to Polar Coordinates Converter cartesian-to-polar-converter
Convert Cartesian x-y coordinates to polar radius and angle.
1cr
](/tools/cartesian-to-polar-converter/) [
Circle Calculator circle-calculator
Calculate circle radius, diameter, circumference, area, and optional arc/sector values.
1cr
](/tools/circle-calculator/) [
Circumscribed Circle Circumcircle Calculator circumscribed-circle-circumcircle-calculator
Calculate the circumcircle of a triangle from side lengths or coordinates.
1cr
](/tools/circumscribed-circle-circumcircle-calculator/) [
Cone Flat Pattern Template Generator cone-flat-pattern-template-generator
Calculate unrolled cone or frustum flat-pattern dimensions.
1cr
](/tools/cone-flat-pattern-template-generator/) [
Conic Section Identifier conic-section-identifier
Classify a general second-degree equation as a conic section.
1cr
](/tools/conic-section-identifier/) [
Coordinate Geometry Distance Calculator coordinate-geometry-distance-calculator
Calculate distance, midpoint, slope, and line equations between two points.
1cr
](/tools/coordinate-geometry-distance-calculator/) [
Distance Between Two Points Calculator distance-between-two-points-calculator
Calculate 2D point distance, midpoint, slope, and line equation.
1cr
](/tools/distance-between-two-points-calculator/) [
Ellipse Circumference Calculator ellipse-circumference-calculator
Calculate ellipse circumference with several common approximations.
1cr
](/tools/ellipse-circumference-calculator/) [
Euler Characteristic Calculator euler-characteristic-calculator
Calculate Euler characteristic V - E + F and classify common surfaces.
1cr
](/tools/euler-characteristic-calculator/) [
Frustum Calculator frustum-calculator
Calculate volume and surface area for a conical frustum.
1cr
](/tools/frustum-calculator/) [
Golden Ratio Calculator golden-ratio-calculator
Calculate golden-ratio segments from total, larger, or smaller segment.
1cr
](/tools/golden-ratio-calculator/) [
Golden Rectangle Calculator golden-rectangle-calculator
Calculate golden rectangle dimensions, area, perimeter, and aspect ratio.
1cr
](/tools/golden-rectangle-calculator/) [
Golden Section Calculator golden-section-calculator
Find the golden-section points within an interval.
1cr
](/tools/golden-section-calculator/) [
Great Circle Distance Calculator great-circle-distance-calculator
Calculate great-circle distance, bearing, and midpoint between two coordinates.
1cr
](/tools/great-circle-distance-calculator/) [
Heron's Formula Calculator heron-s-formula-calculator
Calculate triangle area from three side lengths using Heron's formula.
1cr
](/tools/heron-s-formula-calculator/) [
Hypotenuse Calculator hypotenuse-calculator
Calculate the hypotenuse and basic right-triangle measures from two legs.
1cr
](/tools/hypotenuse-calculator/) [
Pythagorean Theorem Calculator pythagorean-theorem-calculator
Find a missing right-triangle side and calculate area, perimeter, and angles.
1cr
](/tools/pythagorean-theorem-calculator/) [
Rectangle Calculator rectangle-calculator
Calculate rectangle area, perimeter, diagonal, radii, and aspect ratio from two known values.
1cr
](/tools/rectangle-calculator/) [
Regular Polygon Calculator regular-polygon-calculator
Calculate regular polygon area, perimeter, apothem, circumradius, angles, and diagonal count.
1cr
](/tools/regular-polygon-calculator/) [
Slope Calculator slope-calculator
Calculate slope, angle, intercepts, and line equation from two points.
1cr
](/tools/slope-calculator/) [
Square Calculator square-calculator
Calculate square side length, area, perimeter, diagonal, inradius, and circumradius from one known value.
1cr
](/tools/square-calculator/)
Geometry Calculators
[
Torus Calculator torus-calculator
Calculate torus volume, surface area, and key radii.
1cr
](/tools/torus-calculator/)
Home
[
Aquarium Substrate Calculator aquarium-substrate-calculator
Estimate aquarium substrate volume, weight, and bag counts.
1cr
](/tools/aquarium-substrate-calculator/)
Length
[
Feet and Inches to Cm Converter feet-and-inches-to-cm-converter
Convert feet and inches to total inches, centimeters, meters, and height comparison percentages.
1cr
](/tools/feet-and-inches-to-cm-converter/)
Linear Algebra
[
Angle Between Vectors Calculator angle-between-vectors-calculator
Calculate the angle between two 2D or 3D vectors.
1cr
](/tools/angle-between-vectors-calculator/) [
Characteristic Polynomial Calculator characteristic-polynomial-calculator
Calculate characteristic polynomial coefficients for a square matrix.
1cr
](/tools/characteristic-polynomial-calculator/) [
Cholesky Decomposition Calculator cholesky-decomposition-calculator
Decompose a symmetric positive-definite matrix into A = L L^T.
1cr
](/tools/cholesky-decomposition-calculator/) [
Column Space Calculator column-space-calculator
Find matrix pivot columns, rank, nullity, RREF, and a column-space basis.
1cr
](/tools/column-space-calculator/) [
Cramer's Rule Calculator cramer-s-rule-calculator
Solve 2x2 or 3x3 linear systems with Cramer's rule.
1cr
](/tools/cramer-s-rule-calculator/) [
Cross Product Calculator cross-product-calculator
Calculate the 3D cross product, magnitude, areas, and angle.
1cr
](/tools/cross-product-calculator/) [
Determinant Calculator determinant-calculator
Calculate the determinant, trace, rank, and invertibility of a square matrix.
1cr
](/tools/determinant-calculator/) [
Dot Product Calculator dot-product-calculator
Calculate the dot product, magnitudes, angle, and vector projection.
1cr
](/tools/dot-product-calculator/) [
Unit Vector Calculator unit-vector-calculator
Normalize a vector and return its unit vector.
1cr
](/tools/unit-vector-calculator/) [
Vector Magnitude Calculator vector-magnitude-calculator
Calculate the Euclidean magnitude and unit vector for any vector.
1cr
](/tools/vector-magnitude-calculator/) [
Vector Projection Calculator vector-projection-calculator
Project one vector onto another and compute the orthogonal component.
1cr
](/tools/vector-projection-calculator/)
Number Systems
[
Base Converter base-converter
Convert integers between bases 2 through 36.
1cr
](/tools/base-converter/) [
Base-N Calculator base-n-calculator
Convert an integer from any base 2 through 36 to every other base.
1cr
](/tools/base-n-calculator/) [
BCD to Binary Converter bcd-to-binary-converter
Convert 8421 BCD nibbles to decimal and binary.
1cr
](/tools/bcd-to-binary-converter/) [
BCD to Decimal Converter bcd-to-decimal-converter
Convert binary-coded decimal nibbles to a decimal integer.
1cr
](/tools/bcd-to-decimal-converter/) [
BCD to Hex Converter bcd-to-hex-converter
Convert BCD to hexadecimal or hexadecimal to BCD.
1cr
](/tools/bcd-to-hex-converter/) [
Binary Calculator binary-calculator
Run binary arithmetic and bitwise operations.
1cr
](/tools/binary-calculator/) [
Binary to BCD Converter binary-to-bcd-converter
Convert an integer binary value to binary-coded decimal.
1cr
](/tools/binary-to-bcd-converter/) [
Binary to Decimal Converter binary-to-decimal-converter
Convert a binary number to decimal, hexadecimal, and octal.
1cr
](/tools/binary-to-decimal-converter/) [
Binary to Gray Code Converter binary-to-gray-code-converter
Convert an integer binary value to Gray code.
1cr
](/tools/binary-to-gray-code-converter/) [
Binary to Hex Converter binary-to-hex-converter
Convert a binary number to hexadecimal with nibble grouping.
1cr
](/tools/binary-to-hex-converter/) [
Binary to Octal Converter binary-to-octal-converter
Convert a binary number to octal using 3-bit grouping.
1cr
](/tools/binary-to-octal-converter/) [
Decimal to Binary Converter decimal-to-binary-converter
Convert a decimal integer to binary with grouped bits and division steps.
1cr
](/tools/decimal-to-binary-converter/) [
Decimal to Hex Converter decimal-to-hex-converter
Convert a decimal integer to hexadecimal with conversion steps.
1cr
](/tools/decimal-to-hex-converter/) [
Decimal to Octal Converter decimal-to-octal-converter
Convert a base-10 integer to octal with division steps.
1cr
](/tools/decimal-to-octal-converter/) [
Decimal to Scientific Notation Converter decimal-to-scientific-notation-converter
Convert decimal numbers to scientific, E, and engineering notation.
1cr
](/tools/decimal-to-scientific-notation-converter/) [
Gray Code to Binary Converter gray-code-to-binary-converter
Convert Gray code to ordinary binary with XOR steps.
1cr
](/tools/gray-code-to-binary-converter/) [
Hex to BCD Converter hex-to-bcd-converter
Convert a hexadecimal integer to binary-coded decimal.
1cr
](/tools/hex-to-bcd-converter/) [
Hex to Binary Converter hex-to-binary-converter
Convert a hexadecimal integer to binary.
1cr
](/tools/hex-to-binary-converter/) [
Hex to Decimal Converter hex-to-decimal-converter
Convert a hexadecimal integer to decimal with digit breakdown.
1cr
](/tools/hex-to-decimal-converter/) [
Hex to Octal Converter hex-to-octal-converter
Convert a hexadecimal integer to octal through binary grouping.
1cr
](/tools/hex-to-octal-converter/) [
Octal to Binary Converter octal-to-binary-converter
Convert an octal integer to binary with per-digit mapping.
1cr
](/tools/octal-to-binary-converter/) [
Octal to Decimal Converter octal-to-decimal-converter
Convert an octal integer to decimal with positional breakdown.
1cr
](/tools/octal-to-decimal-converter/) [
Ratio to Percentage Calculator ratio-to-percentage-calculator
Convert ratios, fractions, or decimal divisions to percentages.
1cr
](/tools/ratio-to-percentage-calculator/) [
Scientific Notation to Decimal Converter scientific-notation-to-decimal-converter
Convert scientific notation to ordinary decimal notation.
1cr
](/tools/scientific-notation-to-decimal-converter/)
Number Theory
[
Factorial Calculator factorial-calculator
Calculate factorial metadata, exact values for bounded inputs, and scientific notation.
1cr
](/tools/factorial-calculator/) [
Fibonacci Number Checker fibonacci-number-checker
Check whether a non-negative integer is in the Fibonacci sequence.
1cr
](/tools/fibonacci-number-checker/) [
Goldbach Conjecture Verifier goldbach-conjecture-verifier
Verify an even integer by finding prime pairs that sum to it.
1cr
](/tools/goldbach-conjecture-verifier/)
Percentage
[
Decimal to Percent Converter decimal-to-percent-converter
Convert one or more decimal numbers to percentages.
1cr
](/tools/decimal-to-percent-converter/) [
Percentage Calculator percentage-calculator
Six percentage operations behind one endpoint, selected by mode.
1cr
](/tools/percentage-calculator/) [
Percentage Error Calculator percentage-error-calculator
Calculate percent error between estimated and actual values.
1cr
](/tools/percentage-error-calculator/)
Physics
[
Acceleration Calculator acceleration-calculator
Calculate acceleration from velocity change, distance, force, centripetal motion, or free fall.
1cr
](/tools/acceleration-calculator/) [
Horsepower Calculator horsepower-calculator
Solve horsepower, torque, or RPM and return common power conversions.
1cr
](/tools/horsepower-calculator/)
Probability
[
Binomial Probability Distribution Calculator binomial-probability-distribution-calculator
Calculate exact and cumulative binomial probabilities.
1cr
](/tools/binomial-probability-distribution-calculator/) [
Dice Roll Probability Calculator dice-roll-probability-calculator
Calculate exact probability metrics for sums of identical dice.
1cr
](/tools/dice-roll-probability-calculator/)
Ratios
[
Aspect Ratio Calculator aspect-ratio-calculator
Simplify dimensions to a ratio, derive dimensions from a ratio, or resize proportionally.
1cr
](/tools/aspect-ratio-calculator/) [
Unit Rate Calculator unit-rate-calculator
Calculate a unit rate or compare two unit rates.
1cr
](/tools/unit-rate-calculator/)
Sequence Tools
[
Catalan Number Generator catalan-number-generator
Calculate the nth Catalan number and nearby sequence values.
1cr
](/tools/catalan-number-generator/) [
Collatz Conjecture Calculator collatz-conjecture-calculator
Generate and analyze the deterministic Collatz hailstone sequence.
1cr
](/tools/collatz-conjecture-calculator/)
Sequences
[
Arithmetic Sequence Calculator arithmetic-sequence-calculator
Calculate the nth term and partial sum of an arithmetic sequence.
1cr
](/tools/arithmetic-sequence-calculator/) [
Geometric Sequence Calculator geometric-sequence-calculator
Calculate nth term, partial sum, and sample terms for a geometric sequence.
1cr
](/tools/geometric-sequence-calculator/) [
Happy Number Calculator happy-number-calculator
Check whether a number is happy or list happy numbers up to a limit.
1cr
](/tools/happy-number-calculator/) [
Sum of Cubes Calculator sum-of-cubes-calculator
Calculate 1^3 + 2^3 +... + n^3.
1cr
](/tools/sum-of-cubes-calculator/) [
Sum of Squares Calculator sum-of-squares-calculator
Calculate 1^2 + 2^2 +... + n^2.
1cr
](/tools/sum-of-squares-calculator/)
Sports
[
Bike Gear Ratio Calculator bike-gear-ratio-calculator
Calculate bicycle gear ratio, gear inches, rollout, gain ratio, and speed.
1cr
](/tools/bike-gear-ratio-calculator/) [
Cricket Run Rate Calculator cricket-run-rate-calculator
Calculate current, projected, and required cricket run rates from cricket over notation.
1cr
](/tools/cricket-run-rate-calculator/) [
Usage Rate Calculator usage-rate-calculator
Calculate basketball usage rate from player and team shot, free throw, turnover, and minute stats.
1cr
](/tools/usage-rate-calculator/)
Statistics
[
Arithmetic Mean Calculator arithmetic-mean-calculator
Calculate arithmetic mean, median, modes, range, variance, and standard deviation from a number list.
1cr
](/tools/arithmetic-mean-calculator/) [
Average Calculator average-calculator
Calculate mean, median, mode, range, variance, and optional weighted average.
1cr
](/tools/average-calculator/) [
Average Deviation Calculator average-deviation-calculator
Calculate mean and median absolute deviation for a numeric dataset.
1cr
](/tools/average-deviation-calculator/) [
Coefficient of Variation Calculator coefficient-of-variation-calculator
Calculate coefficient of variation from sample or population standard deviation.
1cr
](/tools/coefficient-of-variation-calculator/) [
Cohen's d Calculator cohens-d-calculator
Calculate Cohen's d, Hedges' g, overlap, and effect-size interpretation.
1cr
](/tools/cohens-d-calculator/) [
Correlation Coefficient Calculator correlation-coefficient-calculator
Calculate Pearson, Spearman, and Kendall correlation coefficients.
1cr
](/tools/correlation-coefficient-calculator/) [
Find Minimum and Maximum find-minimum-maximum
Find min, max, range, mean, median, positions, and sorted values for a number list.
1cr
](/tools/find-minimum-maximum/) [
Five Number Summary Calculator five-number-summary-calculator
Calculate minimum, Q1, median, Q3, maximum, IQR, and outlier fences.
1cr
](/tools/five-number-summary-calculator/) [
Geometric Mean Calculator geometric-mean-calculator
Calculate geometric mean and compare it with arithmetic, harmonic, median, minimum, and maximum values.
1cr
](/tools/geometric-mean-calculator/) [
Harmonic Mean Calculator harmonic-mean-calculator
Calculate harmonic mean for positive non-zero values with comparison means and reciprocal totals.
1cr
](/tools/harmonic-mean-calculator/) [
Interquartile Range Calculator interquartile-range-calculator
Calculate IQR, quartiles, and 1.5-IQR outlier fences.
1cr
](/tools/interquartile-range-calculator/) [
Mean Calculator mean-calculator
Calculate arithmetic mean and supporting summary statistics.
1cr
](/tools/mean-calculator/) [
Median Calculator median-calculator
Calculate the median, sorted data, quartiles, and range.
1cr
](/tools/median-calculator/) [
Midrange Calculator midrange-calculator
Calculate the midpoint between the minimum and maximum of a dataset.
1cr
](/tools/midrange-calculator/) [
Mode Calculator mode-calculator
Find the mode or modes and frequency table for a numeric dataset.
1cr
](/tools/mode-calculator/) [
Population Variance Calculator population-variance-calculator
Calculate population variance and population standard deviation.
1cr
](/tools/population-variance-calculator/) [
Quartile Calculator quartile-calculator
Calculate Q1, Q2, Q3, IQR, and outlier fences using a selected quartile method.
1cr
](/tools/quartile-calculator/) [
Root Mean Square Calculator root-mean-square-calculator
Calculate root mean square for a numeric list.
1cr
](/tools/root-mean-square-calculator/) [
Sample Standard Deviation Calculator sample-standard-deviation-calculator
Calculate sample standard deviation and optional z-score outliers.
1cr
](/tools/sample-standard-deviation-calculator/) [
Sample Variance Calculator sample-variance-calculator
Calculate sample or population variance from a numeric dataset.
1cr
](/tools/sample-variance-calculator/) [
Standard Deviation Calculator standard-deviation-calculator
Calculate sample and population standard deviation with quartiles.
1cr
](/tools/standard-deviation-calculator/) [
Variance Calculator variance-calculator
Calculate sample and population variance with related statistics.
1cr
](/tools/variance-calculator/) [
Z-Score Calculator zscore-calculator
Calculate z-scores, inverse values, percentiles, and normal probabilities.
1cr
](/tools/zscore-calculator/)
Surface Area
[
Surface Area of a Cone Calculator surface-area-of-a-cone-calculator
Calculate cone base, lateral, and total surface area from radius-height, radius-slant, or diameter-height inputs.
1cr
](/tools/surface-area-of-a-cone-calculator/) [
Surface Area of a Cube Calculator surface-area-of-a-cube-calculator
Calculate cube surface area and related measurements from edge, diagonal, volume, or surface area.
1cr
](/tools/surface-area-of-a-cube-calculator/)
Trigonometry
[
Arccos Calculator arccos-calculator
Calculate inverse cosine in radians and degrees.
1cr
](/tools/arccos-calculator/) [
Arcsin Calculator arcsin-calculator
Calculate arcsine from a sine value, including degree/radian output and special-angle recognition.
1cr
](/tools/arcsin-calculator/) [
Arctan Calculator arctan-calculator
Calculate inverse tangent in radians and degrees.
1cr
](/tools/arctan-calculator/) [
Arctan2 Calculator arctan2-calculator
Calculate atan2(y, x), normalized angle, radius, slope, and quadrant.
1cr
](/tools/arctan2-calculator/) [
Cosine Calculator cosine-calculator
Calculate cosine with radians/degrees conversion, quadrant, and special-angle recognition.
1cr
](/tools/cosine-calculator/) [
Cosecant/Secant/Cotangent Calculator csc-sec-cot-calculator
Calculate csc, sec, cot, sine, and cosine for an angle.
1cr
](/tools/csc-sec-cot-calculator/) [
Degree to Radian Converter degree-to-radian-converter
Convert degrees to radians with pi-fraction, quadrant, and trig values.
1cr
](/tools/degree-to-radian-converter/) [
DMS to Decimal Degrees Converter dms-to-decimal-converter
Convert degrees, minutes, and seconds to signed decimal degrees.
1cr
](/tools/dms-to-decimal-converter/) [
Law of Cosines Calculator law-of-cosines-calculator
Use the law of cosines to solve a side or included angle.
1cr
](/tools/law-of-cosines-calculator/) [
Law of Sines Calculator law-of-sines-calculator
Use the law of sines to solve a side or possible angle.
1cr
](/tools/law-of-sines-calculator/) [
Sine Calculator sine-calculator
Calculate sine with radians/degrees conversion, quadrant, and special-angle recognition.
1cr
](/tools/sine-calculator/) [
Tangent Calculator tangent-calculator
Calculate tangent and flag vertical-asymptote inputs.
1cr
](/tools/tangent-calculator/)
Unit Converters
[
Acres to Hectares Converter acres-to-hectares-converter
Convert between acres and hectares with related area units.
1cr
](/tools/acres-to-hectares-converter/) [
Acres to Perches Converter acres-to-perches-converter
Convert acres and perches for land area calculations.
1cr
](/tools/acres-to-perches-converter/) [
Acres to Square Feet Converter acres-to-square-feet-converter
Convert between acres and square feet with related area units.
1cr
](/tools/acres-to-square-feet-converter/) [
Acres to Square Meters Converter acres-to-square-meters-converter
Convert between acres and square meters with related area units.
1cr
](/tools/acres-to-square-meters-converter/) [
Acres to Square Miles Converter acres-to-square-miles-converter
Convert acres and square miles, including related land-area units.
1cr
](/tools/acres-to-square-miles-converter/) [
Acres to Square Yards Converter acres-to-square-yards-converter
Convert acres and square yards, including related area units.
1cr
](/tools/acres-to-square-yards-converter/) [
Angle Converter angle-converter
Convert angles between degrees, radians, gradians, turns, arcminutes, arcseconds, and milliradians.
1cr
](/tools/angle-converter/) [
CM to Inches Converter cm-to-inches-converter
Convert centimeters to inches, feet/inches, and nearest 1/16-inch fraction.
1cr
](/tools/cm-to-inches-converter/) [
Cups to Tablespoons Converter cups-to-tablespoons-converter
Convert US cups and tablespoons, including teaspoons and fluid ounces.
1cr
](/tools/cups-to-tablespoons-converter/) [
Feet to Meters Converter feet-to-meters-converter
Convert feet and optional inches to meters, centimeters, and millimeters.
1cr
](/tools/feet-to-meters-converter/) [
Gallons to Cups Converter gallons-to-cups-converter
Convert US gallons and cups, with quart and pint equivalents.
1cr
](/tools/gallons-to-cups-converter/) [
Grams to Ounces Converter grams-to-ounces-converter
Convert grams to ounces, pounds, kilograms, and milligrams.
1cr
](/tools/grams-to-ounces-converter/) [
Grams to Pounds Converter grams-to-pounds-converter
Convert grams to pounds, ounces, and kilograms.
1cr
](/tools/grams-to-pounds-converter/) [
Inches to CM Converter inches-to-cm-converter
Convert inches to centimeters, millimeters, meters, and feet.
1cr
](/tools/inches-to-cm-converter/) [
kg to lbs Converter kg-to-lbs-converter
Convert kilograms and pounds with ounce breakdown.
1cr
](/tools/kg-to-lbs-converter/) [
kPa to psi Converter kpa-to-psi-converter
Convert kilopascals to psi, bar, atm, and mmHg.
1cr
](/tools/kpa-to-psi-converter/) [
Liters to Cups Converter liters-to-cups-converter
Convert liters to US, metric, and imperial cups.
1cr
](/tools/liters-to-cups-converter/) [
Meters to Feet Converter meters-to-feet-converter
Convert meters to decimal feet and feet-and-inches.
1cr
](/tools/meters-to-feet-converter/) [
Ounce to Gram Converter ounce-to-gram-converter
Convert ounces to grams, kilograms, milligrams, and pounds.
1cr
](/tools/ounce-to-gram-converter/) [
Ounces to Cups Converter ounces-to-cups-converter
Convert US fluid ounces and cups with spoon and milliliter equivalents.
1cr
](/tools/ounces-to-cups-converter/) [
Percent to PPM Converter percent-to-ppm-converter
Convert percent to ppm or ppm to percent.
1cr
](/tools/percent-to-ppm-converter/) [
Perches to Acres Converter perches-to-acres-converter
Convert perches and acres for land area calculations.
1cr
](/tools/perches-to-acres-converter/) [
Pounds to Grams Converter pounds-to-grams-converter
Convert pounds to grams, kilograms, ounces, and milligrams.
1cr
](/tools/pounds-to-grams-converter/) [
PPM to Percent Converter ppm-to-percent-converter
Convert parts per million to percentage and related concentration scales.
1cr
](/tools/ppm-to-percent-converter/) [
Square Yards to Acres Converter square-yards-to-acres-converter
Convert square yards and acres, including related area units.
1cr
](/tools/square-yards-to-acres-converter/) [
Tablespoons to Cups Converter tablespoons-to-cups-converter
Convert US tablespoons to cups, teaspoons, fluid ounces, and milliliters.
1cr
](/tools/tablespoons-to-cups-converter/) [
Tablespoons to Teaspoons Converter tablespoons-to-teaspoons-converter
Convert US tablespoons to teaspoons, cups, fluid ounces, and milliliters.
1cr
](/tools/tablespoons-to-teaspoons-converter/) [
Teaspoons to Cups Converter teaspoons-to-cups-converter
Convert US teaspoons and cups, including tablespoons and fluid ounces.
1cr
](/tools/teaspoons-to-cups-converter/) [
Teaspoons to Tablespoons Converter teaspoons-to-tablespoons-converter
Convert US teaspoons to tablespoons, cups, fluid ounces, and milliliters.
1cr
](/tools/teaspoons-to-tablespoons-converter/)
Volume
[
Cups to Gallons Converter cups-to-gallons-converter
Convert US cups and gallons with related volume units.
1cr
](/tools/cups-to-gallons-converter/) [
Cups to Liters Converter cups-to-liters-converter
Convert US cups and liters with milliliter, fluid-ounce, and spoon equivalents.
1cr
](/tools/cups-to-liters-converter/) [
Cups to Ounces Converter cups-to-ounces-converter
Convert cups and fluid ounces for US customary, US legal, imperial, or metric cups.
1cr
](/tools/cups-to-ounces-converter/) [
Cups to Quarts Converter cups-to-quarts-converter
Convert US cups and quarts with related volume units.
1cr
](/tools/cups-to-quarts-converter/) [
Cups to Teaspoons Converter cups-to-teaspoons-converter
Convert US cups and teaspoons with tablespoon and fluid-ounce equivalents.
1cr
](/tools/cups-to-teaspoons-converter/) [
Volume of a Cone Calculator volume-of-a-cone-calculator
Calculate cone volume, slant height, base area, lateral area, and total surface area.
1cr
](/tools/volume-of-a-cone-calculator/) [
Volume of a Cube Calculator volume-of-a-cube-calculator
Calculate cube volume, surface area, face area, diagonals, and total edge length.
1cr
](/tools/volume-of-a-cube-calculator/) [
Volume of a Pyramid Calculator volume-of-a-pyramid-calculator
Calculate volume, base area, slant height, and surface area for square, rectangular, or triangular pyramids.
1cr
](/tools/volume-of-a-pyramid-calculator/) [
Volume of a Rectangular Prism Calculator volume-of-a-rectangular-prism-calculator
Calculate rectangular prism volume, surface area, diagonals, base perimeter, and total edge length.
1cr
](/tools/volume-of-a-rectangular-prism-calculator/) [
Volume of Ellipsoid Calculator volume-of-ellipsoid-calculator
Calculate ellipsoid volume, approximate surface area, cross sections, equivalent sphere radius, and shape type.
1cr
](/tools/volume-of-ellipsoid-calculator/)

## [Random](/tools/category/random/) 12 endpoints [Full page →](/tools/category/random/)

Random generators for apps, tests, and automations.
Cards
[
Random Playing Card Generator random-playing-card-generator
Draw random playing cards from a standard deck with optional jokers.
1cr
](/tools/random-playing-card-generator/)
Color
[
Random Color Generator random-color-generator
Generate random HEX, RGB, and HSL colors with optional harmony rules.
1cr
](/tools/random-color-generator/)
Date
[
Random Date Generator random-date-generator
Generate random dates inside a bounded date range.
1cr
](/tools/random-date-generator/)
Lists
[
List Randomizer list-randomizer
Shuffle a newline-separated list into random order.
1cr
](/tools/list-randomizer/) [
Random Group Generator random-group-generator
Create random balanced groups from a newline-separated list of names.
1cr
](/tools/random-group-generator/) [
Random Line Picker random-line-picker
Pick random non-empty lines from user-supplied text.
1cr
](/tools/random-line-picker/)
Network
[
Random Port Number Generator random-port-number-generator
Generate random network port numbers in standard or custom ranges.
1cr
](/tools/random-port-number-generator/)
Numbers
[
Random Decimal Number Generator random-decimal-number-generator
Generate random decimal numbers between 0 and 1 with configurable precision.
1cr
](/tools/random-decimal-number-generator/) [
Random Integer Generator random-integer-generator
Generate random integers with optional uniqueness, sorting, exclusions, and seed replay.
1cr
](/tools/random-integer-generator/)
Quotes
[
Random Quote Generator random-quote-generator
Generate or search quotes from a bundled SQLite quote database.
3cr
](/tools/random-quote-generator/)
Text
[
Random Letter Generator random-letter-generator
Generate random letters with case, vowel/consonant, and duplicate controls.
1cr
](/tools/random-letter-generator/) [
Random String Generator random-string-generator
Generate random strings, passwords, API keys, tokens, PINs, or hex strings.
1cr
](/tools/random-string-generator/)

## [Webmaster](/tools/category/webmaster/) 8 endpoints [Full page →](/tools/category/webmaster/)

DNS, HTTP, meta, robots, and other webmaster utilities.
Advertising
[
CPC Calculator cpc-calculator
Calculate CPC, CPM, or CTR from two known campaign metrics.
1cr
](/tools/cpc-calculator/) [
CPM Calculator cpm-calculator
Calculate campaign cost, CPM, or impressions from two known advertising metrics.
1cr
](/tools/cpm-calculator/)
Analytics
[
Value of A Visitor Calculator value-of-a-visitor-calculator
Calculate website visitor value, conversion rate, annualized revenue, and traffic ROI.
2cr
](/tools/value-of-a-visitor-calculator/)
CSS
[
CSS Box Shadow Generator css-box-shadow-generator
Generate a CSS box-shadow declaration from numeric shadow controls.
1cr
](/tools/css-box-shadow-generator/) [
CSS Compressor css-compressor
Minify CSS and return compression statistics.
1cr
](/tools/css-compressor/)
Encoding
[
JSON String Escape/Unescape json-string-escape-unescape
Escape or unescape JSON string content deterministically.
1cr
](/tools/json-string-escape-unescape/)
IP
[
IP Address to Binary Converter ip-address-to-binary-converter
Convert IPv4 or IPv6 addresses to padded binary forms.
1cr
](/tools/ip-address-to-binary-converter/)
SEO
[
URL Slug Generator url-slug-generator
Generate an SEO-friendly URL slug from a title or phrase.
1cr
](/tools/url-slug-generator/)

## [Color](/tools/category/color/) 3 endpoints [Full page →](/tools/category/color/)

Accessibility
[
Color Contrast Checker color-contrast-checker
Check WCAG contrast ratio and AA/AAA compliance for two colors.
1cr
](/tools/color-contrast-checker/)
Conversion
[
Color Code Converter color-code-converter-all-formats
Convert HEX, RGB, HSL, HSV, CMYK, and common CSS named colors.
1cr
](/tools/color-code-converter-all-formats/)
Palette
[
Color Scheme Generator color-scheme-generator
Generate complementary, analogous, triadic, square, tetradic, and monochromatic palettes.
1cr
](/tools/color-scheme-generator/)

## [Construction](/tools/category/construction/) 5 endpoints [Full page →](/tools/category/construction/)

Lumber
[
Board Foot Calculator board-foot-calculator
Calculate lumber volume in board feet, cubic volume, weight, and optional cost.
1cr
](/tools/board-foot-calculator/)
Materials
[
Carpet Calculator carpet-calculator
Estimate carpet area, waste, roll length, padding, installation, and cost.
1cr
](/tools/carpet-calculator/) [
Decking Calculator decking-calculator
Estimate decking boards, joists, beams, posts, fasteners, and waste.
1cr
](/tools/decking-calculator/) [
Tile Calculator tile-calculator
Estimate tile count, boxes, grout, adhesive, sealer, waste, and optional cost.
1cr
](/tools/tile-calculator/) [
Wallpaper Calculator wallpaper-calculator
Estimate wallpaper drops, rolls, waste, coverage, and optional cost.
1cr
](/tools/wallpaper-calculator/)

## [Conversion](/tools/category/conversion/) 1 endpoint [Full page →](/tools/category/conversion/)

[
Fuel Efficiency Converter fuel-efficiency-converter-mpg-l-100km-km-l
Convert MPG, L/100km, km/L, and miles/L fuel-efficiency values.
1cr
](/tools/fuel-efficiency-converter-mpg-l-100km-km-l/)

## [Converters](/tools/category/converters/) 1 endpoint [Full page →](/tools/category/converters/)

[
Torque Converter torque-converter-nm-ft-lb-kgf-cm
Convert torque between Nm, ft-lb, in-lb, kgf-cm, kgf-m, dyn-cm, oz-in, and oz-ft.
1cr
](/tools/torque-converter-nm-ft-lb-kgf-cm/)

## [Cooking](/tools/category/cooking/) 8 endpoints [Full page →](/tools/category/cooking/)

Baking
[
Baking Pan Size Converter baking-pan-size-converter
Scale a recipe when switching between common baking pan sizes.
1cr
](/tools/baking-pan-size-converter/) [
Dough Hydration Calculator dough-hydration-calculator
Calculate dough hydration, required water, or a simple baker's percentage recipe.
1cr
](/tools/dough-hydration-calculator/)
Coffee
[
Coffee Brew Ratio Calculator coffee-brew-ratio-calculator
Calculate coffee and water amounts for common brewing methods and strengths.
1cr
](/tools/coffee-brew-ratio-calculator/)
Conversion
[
Cooking Unit Converter cooking-unit-converter
Convert cooking volume and weight units using ingredient density.
1cr
](/tools/cooking-unit-converter/) [
Cups to Grams Converter cups-to-grams-converter
Convert cups to grams for common cooking ingredients.
1cr
](/tools/cups-to-grams-converter/)
Conversions
[
Yeast Conversion Calculator yeast-conversion-calculator
Convert fresh, active dry, and instant yeast amounts.
1cr
](/tools/yeast-conversion-calculator/)
Fermentation
[
Brine and Salinity Calculator brine-and-salinity-calculator
Calculate salt, water, or salinity for brines and fermentation recipes.
1cr
](/tools/brine-and-salinity-calculator/)
Ratios
[
Baker's Percentage Calculator baker-s-percentage-calculator
Scale bread ingredients from flour weight and baker's percentages.
1cr
](/tools/baker-s-percentage-calculator/)

## [Craft](/tools/category/craft/) 1 endpoint [Full page →](/tools/category/craft/)

[
Cross-Stitch Size Calculator cross-stitch-size-calculator
Calculate finished cross-stitch design and fabric sizes from stitch and fabric counts.
1cr
](/tools/cross-stitch-size-calculator/)

## [Datetime](/tools/category/datetime/) 1 endpoint [Full page →](/tools/category/datetime/)

[
Decimal to Time Converter decimal-to-time-converter
Convert decimal hours to hours, minutes, and seconds.
1cr
](/tools/decimal-to-time-converter/)

## [Dev](/tools/category/dev/) 5 endpoints [Full page →](/tools/category/dev/)

Color
[
CMYK to Hex Converter cmyk-to-hex-converter
Convert CMYK percentages to RGB, HEX, HSL, HSV, and contrast text color.
1cr
](/tools/cmyk-to-hex-converter/) [
Hex to CMYK Converter hex-to-cmyk-converter
Convert a hex color to CMYK print percentages.
1cr
](/tools/hex-to-cmyk-converter/) [
Hex to RGB Converter hex-to-rgb-converter
Convert a hex color to RGB, HSL, CMYK, and contrast metrics.
1cr
](/tools/hex-to-rgb-converter/) [
RGB to Hex Converter rgb-to-hex-converter
Convert RGB channels to hex, HSL, HSV, CMYK, and relative luminance.
1cr
](/tools/rgb-to-hex-converter/)
Encoding
[
Base64 Decoder base64-decoder
Decode standard or URL-safe Base64 text and return byte and character analysis.
1cr
](/tools/base64-decoder/)

## [Developer](/tools/category/developer/) 6 endpoints [Full page →](/tools/category/developer/)

Data Conversion
[
XML to JSON Converter xml-to-json-converter
Convert XML into JSON using standard, compact, JsonML, or preserve styles.
1cr
](/tools/xml-to-json-converter/)
Data Formatting
[
YAML Formatter/Validator yaml-formatter-validator
Validate, format, minify, or convert YAML to JSON.
1cr
](/tools/yaml-formatter-validator/)
Data Validation
[
XML Validator xml-validator
Validate XML well-formedness and return document statistics.
1cr
](/tools/xml-validator/)
Encoders
[
Text to Binary/Hex/ASCII Converter text-to-binary-hex-ascii-converter
Encode or decode text, binary, hex, and ASCII byte values.
1cr
](/tools/text-to-binary-hex-ascii-converter/)
General Tools
[
Unix Permission Calculator unix-permission-calculator
Convert Unix permission digits into symbolic permissions and chmod notation.
1cr
](/tools/unix-permission-calculator/)
Text Conversion
[
Text to SQL List Converter text-to-sql-list-converter
Convert lines of text into quoted SQL IN-list or tuple syntax.
1cr
](/tools/text-to-sql-list-converter/)

## [Electronics](/tools/category/electronics/) 4 endpoints [Full page →](/tools/category/electronics/)

Circuits
[
Transformer Calculator transformer-calculator
Calculate transformer turns ratio, secondary voltage, current, power, and impedance ratio.
1cr
](/tools/transformer-calculator/) [
Voltage Divider Calculator voltage-divider-calculator
Calculate voltage divider output or solve for R1 or R2.
1cr
](/tools/voltage-divider-calculator/)
Runtime
[
Battery Life Calculator battery-life-calculator
Estimate battery runtime from capacity, consumption, and efficiency.
1cr
](/tools/battery-life-calculator/)
Wiring
[
Voltage Drop Calculator voltage-drop-calculator
Calculate electrical voltage drop for AWG copper or aluminum wire runs.
1cr
](/tools/voltage-drop-calculator/)

## [Engineering](/tools/category/engineering/) 1 endpoint [Full page →](/tools/category/engineering/)

[
Wire Gauge Calculator wire-gauge-calculator
Calculate AWG diameter, area, resistance, ampacity, and optional voltage drop.
1cr
](/tools/wire-gauge-calculator/)

## [Marketing](/tools/category/marketing/) 1 endpoint [Full page →](/tools/category/marketing/)

[
CTR Calculator ctr-calculator
Calculate click-through rate, required clicks for a target CTR, or bulk campaign CTR.
1cr
](/tools/ctr-calculator/)

## [Miscellaneous](/tools/category/miscellaneous/) 3 endpoints [Full page →](/tools/category/miscellaneous/)

General Tools
[
Tire Size Calculator tire-size-calculator
Calculate tire sidewall, diameter, circumference, and revolutions per mile.
1cr
](/tools/tire-size-calculator/)
Student Calculators
[
Test Score Calculator test-score-calculator
Convert earned and total test points into a percentage, letter grade, and GPA points.
1cr
](/tools/test-score-calculator/) [
Weighted Grade Calculator weighted-grade-calculator
Calculate a weighted course grade from category weights and scores.
1cr
](/tools/weighted-grade-calculator/)

## [Physics](/tools/category/physics/) 1 endpoint [Full page →](/tools/category/physics/)

[
Boiling Point Calculator boiling-point-calculator
Calculate water boiling point from altitude or atmospheric pressure.
1cr
](/tools/boiling-point-calculator/)

## [Science](/tools/category/science/) 29 endpoints [Full page →](/tools/category/science/)

Astronomy
[
Astronomical Unit Converter astronomical-unit-converter
Convert astronomical distances among AU, light-time, parsecs, kilometers, and miles.
1cr
](/tools/astronomical-unit-converter/)
Chemistry
[
Percent Yield Calculator percent-yield-calculator
Solve percent yield, actual yield, or theoretical yield.
1cr
](/tools/percent-yield-calculator/)
Electronics
[
555 Timer Calculator 555-timer-calculator
Calculate 555 timer astable frequency, period, duty cycle, or monostable pulse width.
1cr
](/tools/555-timer-calculator/) [
Capacitor Calculator capacitor-calculator
Calculate capacitor charge, stored energy, reactance, RC timing, or decode ceramic capacitor codes.
1cr
](/tools/capacitor-calculator/) [
Decibel (dB) Calculator decibel-db-calculator
Calculate power dB, voltage dB, dB ratios, and dBm/dBW/watt conversions.
1cr
](/tools/decibel-db-calculator/) [
Resonant Frequency Calculator resonant-frequency-calculator
Calculate LC/RLC resonant frequency, inductance, capacitance, impedance, Q factor, and bandwidth.
1cr
](/tools/resonant-frequency-calculator/)
Physics
[
Density Calculator density-calculator
Solve density, mass, or volume with common unit conversions.
1cr
](/tools/density-calculator/) [
Force Calculator force-calculator
Solve Newton's second law for force, mass, or acceleration with common unit conversions.
1cr
](/tools/force-calculator/) [
Kinetic Energy Calculator kinetic-energy-calculator
Solve kinetic energy, mass, or velocity with KE = 1/2 m v^2 and unit conversions.
1cr
](/tools/kinetic-energy-calculator/) [
Potential Energy Calculator potential-energy-calculator
Calculate gravitational or elastic potential energy and solve for missing variables.
1cr
](/tools/potential-energy-calculator/) [
Torque Calculator torque-calculator
Solve torque, force, lever arm distance, or angle using tau = F r sin(theta).
1cr
](/tools/torque-calculator/) [
Velocity Calculator velocity-calculator
Calculate average velocity, distance, time, or relative velocity with distance, time, and speed units.
1cr
](/tools/velocity-calculator/) [
Work and Power Calculator work-and-power-calculator
Calculate mechanical work and power with common unit conversions.
1cr
](/tools/work-and-power-calculator/)
Pressure
[
Bar to PSI Converter bar-to-psi-converter
Convert bar and PSI, including kPa, MPa, atm, torr, inHg, and Pa.
1cr
](/tools/bar-to-psi-converter/) [
psi to kPa Converter psi-to-kpa-converter
Convert pounds per square inch to kilopascals and related pressure units.
1cr
](/tools/psi-to-kpa-converter/)
Temperature
[
Celsius to Fahrenheit Calculator celsius-to-fahrenheit-calculator
Convert Celsius to Fahrenheit and related temperature scales.
1cr
](/tools/celsius-to-fahrenheit-calculator/) [
Celsius to Kelvin Converter celsius-to-kelvin-converter
Convert Celsius to Kelvin and related temperature scales.
1cr
](/tools/celsius-to-kelvin-converter/) [
Celsius to Rankine Converter celsius-to-rankine-converter
Convert Celsius to Rankine and related temperature scales.
1cr
](/tools/celsius-to-rankine-converter/) [
Fahrenheit to Celsius Calculator fahrenheit-to-celsius-calculator
Convert Fahrenheit to Celsius and related temperature scales.
1cr
](/tools/fahrenheit-to-celsius-calculator/) [
Fahrenheit to Kelvin Converter fahrenheit-to-kelvin-converter
Convert Fahrenheit to Kelvin and related temperature scales.
1cr
](/tools/fahrenheit-to-kelvin-converter/) [
Fahrenheit to Rankine Converter fahrenheit-to-rankine-converter
Convert Fahrenheit to Rankine and related temperature scales.
1cr
](/tools/fahrenheit-to-rankine-converter/) [
Kelvin to Celsius Converter kelvin-to-celsius-converter
Convert Kelvin to Celsius and related temperature scales.
1cr
](/tools/kelvin-to-celsius-converter/) [
Kelvin to Fahrenheit Converter kelvin-to-fahrenheit-converter
Convert Kelvin to Fahrenheit and related temperature scales.
1cr
](/tools/kelvin-to-fahrenheit-converter/) [
Rankine to Celsius Converter rankine-to-celsius-converter
Convert Rankine to Celsius and related temperature scales.
1cr
](/tools/rankine-to-celsius-converter/) [
Rankine to Fahrenheit Converter rankine-to-fahrenheit-converter
Convert Rankine to Fahrenheit and related temperature scales.
1cr
](/tools/rankine-to-fahrenheit-converter/)
Unit Converters
[
Energy Converter energy-converter
Convert energy between joules, calories, BTU, watt-hours, electronvolts, ergs, and therms.
1cr
](/tools/energy-converter/) [
Power Converter power-converter
Convert power among watts, kilowatts, horsepower, BTU per hour, refrigeration tons, and related units.
1cr
](/tools/power-converter/) [
Ultimate Frequency & Wavelength Converter ultimate-frequency-wavelength-converter
Convert between frequency and wavelength using a configurable propagation speed and identify the spectrum band.
1cr
](/tools/ultimate-frequency-wavelength-converter/)
Weather
[
Wind Chill Calculator wind-chill-calculator
Calculate NWS wind chill and frostbite risk from air temperature and wind speed.
1cr
](/tools/wind-chill-calculator/)

## [Sports](/tools/category/sports/) 11 endpoints [Full page →](/tools/category/sports/)

Baseball
[
At Bats per Home Run Calculator at-bats-per-home-run-calculator
Calculate baseball at-bats per home run ratio and home run rate.
1cr
](/tools/at-bats-per-home-run-calculator/) [
Batting Average Calculator batting-average-calculator
Calculate baseball batting average from hits and at-bats.
1cr
](/tools/batting-average-calculator/) [
ERA Calculator era-calculator
Calculate baseball earned run average.
1cr
](/tools/era-calculator/) [
FIP Calculator fip-calculator
Calculate baseball fielding independent pitching.
1cr
](/tools/fip-calculator/) [
OPS Calculator ops-calculator
Calculate baseball on-base plus slugging with OBP and SLG components.
1cr
](/tools/ops-calculator/) [
Slugging Percentage Calculator slugging-percentage-calculator
Calculate baseball slugging percentage from hit types.
1cr
](/tools/slugging-percentage-calculator/) [
Total Bases Calculator total-bases-calculator
Calculate baseball total bases from singles, doubles, triples, and home runs.
1cr
](/tools/total-bases-calculator/)
Basketball
[
Effective Field Goal Percentage Calculator efg-calculator
Calculate basketball effective field goal percentage.
1cr
](/tools/efg-calculator/) [
Field Goal Percentage Calculator field-goal-percentage-calculator
Calculate made-shot percentage and related shooting metrics.
1cr
](/tools/field-goal-percentage-calculator/) [
Rebound Rate Calculator rebound-rate-calculator
Calculate basketball offensive, defensive, and total rebound rates.
1cr
](/tools/rebound-rate-calculator/) [
True Shooting Percentage Calculator true-shooting-percentage-calculator
Calculate basketball true shooting percentage from points, FGA, and FTA.
1cr
](/tools/true-shooting-percentage-calculator/)

## [Time-Date](/tools/category/time-date/) 7 endpoints [Full page →](/tools/category/time-date/)

Date Tools
[
Date Calculator date-calculator
Add or subtract years, months, weeks, and days from a date.
1cr
](/tools/date-calculator/) [
Date Difference Calculator date-difference-calculator
Calculate days, weeks, approximate months/years, and business days between two dates.
1cr
](/tools/date-difference-calculator/) [
Time Between Two Dates time-between-two-dates
Calculate exact elapsed time between two ISO datetimes.
1cr
](/tools/time-between-two-dates/)
Time Calculators
[
Time Duration Calculator time-duration-calculator
Calculate elapsed time between two times or datetimes.
1cr
](/tools/time-duration-calculator/) [
Time to Decimal Converter time-to-decimal-converter
Convert between hours/minutes/seconds and decimal hours.
1cr
](/tools/time-to-decimal-converter/) [
Work Hours Calculator work-hours-calculator
Calculate weekly work hours, overtime, and optional pay from day entries.
1cr
](/tools/work-hours-calculator/)
Time Conversion
[
Unix Time Converter unix-time-converter
Convert between Unix timestamps and UTC ISO datetimes.
1cr
](/tools/unix-time-converter/)
© 2026 miniwebtool. API is a separate product from the consumer site. [Terms](https://miniwebtool.com/about/terms-and-disclaimer/#api-terms) [Privacy](https://miniwebtool.com/about/privacy/#api-privacy) [consumer site →](https://miniwebtool.com)