> For the complete documentation index, see [llms.txt](/llms.txt).
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- conversion
17 endpoints

# Conversion API

Same bearer token, same credit pool, same JSON envelope as every other endpoint — drop them into apps, sites, workflows, or agents without rebuilding formulas, validation, or docs.
[Start free →](/billing/checkout/?plan=free) [View OpenAPI](/v1/docs) [All categories](/tools/)
Area
[
Square Feet to Square Meters Converter square-feet-to-square-meters
Convert square feet and square meters with exact international-foot conversion.
1cr · v2026-04-22
](/tools/square-feet-to-square-meters/)
Cooking
[
Quarts to Cups Converter quarts-to-cups-converter
Convert US customary quarts and cups in either direction.
1cr · v2026-04-22
](/tools/quarts-to-cups-converter/)
Fuel
[
Fuel Efficiency Converter fuel-efficiency-converter-mpg-l-100km-km-l
Convert MPG, L/100km, km/L, and miles/L fuel-efficiency values.
1cr · v2026-04-22
](/tools/fuel-efficiency-converter-mpg-l-100km-km-l/)
Length
[
Centimeters to Feet and Inches Converter cm-to-feet-and-inches-converter
Convert centimeters to normalized feet and inches, or convert feet and inches to centimeters.
1cr · v2026-04-22
](/tools/cm-to-feet-and-inches-converter/)
Media
[
FPS Converter fps-converter
Convert between frame counts, duration and timecode at a given frame rate.
1cr · v2026-04-22
](/tools/fps-converter/)
Pressure
[
Pressure Converter pressure-converter
Convert pressure among pascals, kilopascals, megapascals, bar, PSI and standard atmospheres.
1cr · v2026-04-22
](/tools/pressure-converter/) [
PSI to Bar Converter psi-to-bar-converter
Convert pressure between pounds per square inch and bar.
1cr · v2026-04-22
](/tools/psi-to-bar-converter/)
Scale
[
Scale Model Conversion Calculator scale-model-conversion-calculator
Convert a length from one model scale to another.
1cr · v2026-04-22
](/tools/scale-model-conversion-calculator/)
Size
[
Shoe Size Converter shoe-size-converter
Estimate equivalent shoe sizes across US men's, US women's, UK, EU and centimeter systems.
1cr · v2026-04-22
](/tools/shoe-size-converter/)
Speed
[
Knots to MPH Converter knots-to-mph-converter
Convert speed between nautical knots and miles per hour.
1cr · v2026-04-22
](/tools/knots-to-mph-converter/) [
MPH to KMH Converter mph-to-kmh-kmh-to-mph
Convert miles per hour and kilometers per hour in either direction.
1cr · v2026-04-22
](/tools/mph-to-kmh-kmh-to-mph/) [
Speed Converter speed-converter
Convert speed among meters per second, kilometers per hour, miles per hour, knots and feet per second.
1cr · v2026-04-22
](/tools/speed-converter/)
Temperature
[
Temperature Converter temperature-converter
Convert temperatures among Celsius, Fahrenheit and Kelvin.
1cr · v2026-04-22
](/tools/temperature-converter/)
Unit Converters
[
Volume Converter volume-converter
Convert volume among metric, US customary, cooking, and cubic units.
1cr · v2026-04-22
](/tools/volume-converter/) [
Weight (Mass) Converter weight-converter
Convert mass among metric, imperial, ton, stone, and carat units.
1cr · v2026-04-22
](/tools/weight-converter/)
Volume
[
Cubic Feet to Cubic Yards Converter cubic-feet-to-cubic-yards
Convert cubic feet and cubic yards and optionally add material waste and order rounding.
1cr · v2026-04-22
](/tools/cubic-feet-to-cubic-yards/)
Weight
[
Pounds to Kilograms Converter lbs-to-kg-converter
Convert mass between pounds and kilograms using the international avoirdupois pound.
1cr · v2026-04-22
](/tools/lbs-to-kg-converter/)
API OPERATIONAL v1 · OpenAPI 3.1 · MCP 2025-06-18
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