Catalog

All construction calculators

Every free calculator on BuilderCalc, grouped by discipline. Each tool runs in your browser, supports imperial and metric units, and links back to the formulas and the codes it follows.

Concrete Category page →

Calculate concrete volumes, rebar grids, footings and masonry quantities for any construction project.

Material

Rebar Calculator

Estimate total length, weight and number of bars for a rebar grid.

Volumetric

Concrete Footing Calculator

Calculate concrete volume, bags and cost for strip, pad or pier footings.

Structural Category page →

Deflection, moments and loading calculations for structural design checks.

Structural

Beam Deflection Calculator

Maximum deflection for simply-supported, cantilever or fixed-fixed beams.

MEP Category page →

Mechanical, electrical and plumbing calculations — NEC-based wire sizing, pipe flow, HVAC loads.

Electrical

Wire Size Calculator

NEC-based wire sizing with ampacity and voltage-drop check.

Dimensions Category page →

Area, volume and geometry calculators for excavation, roofing and site work.

Volumetric

Fill Dirt Calculator

Volume, weight and truckloads of fill dirt, topsoil, sand or gravel.

Cost Estimators

Cost estimation calculators — coming soon.

Cost estimators are launching in phase 2 of BuilderCalc. Check back soon.