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

# Construction 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/)
Construction And DIY Calculators
[
Lumber Calculator lumber-calculator
Calculate board feet, coverage, waste, linear feet, and lumber cost.
1cr · v2026-04-22
](/tools/lumber-calculator/)
Layout
[
Miter Angle Calculator miter-angle-calculator
Miter and bevel saw angles for flat trim or compound crown-molding cuts, given the corner angle.
1cr · v2026-04-22
](/tools/miter-angle-calculator/) [
Squareness Checker squareness-checker
Check a corner against the Pythagorean 3-4-5 squareness rule.
1cr · v2026-04-22
](/tools/squareness-checker/) [
Stair Calculator stair-calculator
Estimate stair risers, treads, run, stringer length, slope, and step profile data.
1cr · v2026-04-22
](/tools/stair-calculator/)
Lumber
[
Board Foot Calculator board-foot-calculator
Calculate lumber volume in board feet, cubic volume, weight, and optional cost.
1cr · v2026-04-22
](/tools/board-foot-calculator/)
Materials
[
Asphalt Calculator asphalt-calculator
Estimate asphalt volume, tonnage, waste buffer, truckloads, and material cost.
1cr · v2026-04-22
](/tools/asphalt-calculator/) [
Brick and Mortar Calculator brick-and-mortar-calculator
Brick count and mortar volume/bag estimate for a wall, by brick type, bond thickness, and waste allowance.
1cr · v2026-04-22
](/tools/brick-and-mortar-calculator/) [
Carpet Calculator carpet-calculator
Estimate carpet area, waste, roll length, padding, installation, and cost.
1cr · v2026-04-22
](/tools/carpet-calculator/) [
Concrete Calculator concrete-calculator
Concrete volume in cubic feet/yards/meters plus pre-mix bag counts for slabs, footings, round columns, and staircases.
1cr · v2026-04-22
](/tools/concrete-calculator/) [
Decking Calculator decking-calculator
Estimate decking boards, joists, beams, posts, fasteners, and waste.
1cr · v2026-04-22
](/tools/decking-calculator/) [
Drywall Calculator drywall-calculator
Drywall sheets, joint compound, tape, and screws needed for walls and ceilings with a waste allowance.
1cr · v2026-04-22
](/tools/drywall-calculator/) [
Fence Calculator fence-calculator
Fence posts, rails, pickets or panels, concrete, and gate hardware for privacy, picket, post-and-rail, or panel fence styles.
1cr · v2026-04-22
](/tools/fence-calculator/) [
Paint Calculator paint-calculator
Paint quantity for walls, ceiling, and trim with door/window deductions, texture adjustment, and multi-coat coverage.
1cr · v2026-04-22
](/tools/paint-calculator/) [
Steel Weight Calculator steel-weight-calculator
Weight of steel and other metal bars, plates, pipes, tubes, and angles from shape dimensions, density, and quantity.
1cr · v2026-04-22
](/tools/steel-weight-calculator/) [
Tile Calculator tile-calculator
Estimate tile count, boxes, grout, adhesive, sealer, waste, and optional cost.
1cr · v2026-04-22
](/tools/tile-calculator/) [
Wallpaper Calculator wallpaper-calculator
Estimate wallpaper drops, rolls, waste, coverage, and optional cost.
1cr · v2026-04-22
](/tools/wallpaper-calculator/)
Roofing
[
Roof Pitch Calculator roof-pitch-calculator
Calculate roof pitch, angle, slope percent, and rafter multiplier.
1cr · v2026-04-22
](/tools/roof-pitch-calculator/)
Structural
[
Beam Load Calculator beam-load-calculator
Beam bending moment, shear, stress, and deflection for common support/load cases with strength and serviceability checks.
1cr · v2026-04-22
](/tools/beam-load-calculator/) [
Rebar Calculator rebar-calculator
Rebar bar count, total linear footage, and weight for a concrete slab grid, sizes #3-#10 with cover and waste allowance.
1cr · v2026-04-22
](/tools/rebar-calculator/)
API OPERATIONAL v1 · OpenAPI 3.1 · MCP 2025-06-18
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