BCBuildCalcTOOLS FOR REAL PROJECTS
BUILD • PLAN • ESTIMATE

Construction calculators that make projects simpler.

Estimate materials, quantities, coverage and costs in seconds. Free, practical and designed for homeowners, DIYers and contractors.

Open calculators ↓How it works →
✓ No sign-up✓ Works on mobile✓ Metric & imperial-ready✓ Browser-based results

Choose a calculator

Start with your project type. Results are shown instantly, with formulas and assumptions explained.

QUANTITY ESTIMATOR

Concrete calculator

Estimate the concrete volume and order quantity for a rectangular slab.

Free tool
YOUR ESTIMATE
Enter your project dimensions
Your result will appear here.
Formula: Enter dimensions above to see the calculation method.
How to use these tools →Measure, calculate, allow for waste and verify your order.Frequently asked questions →Understand estimates, allowances and safe use.About BuildCalc →Learn why we make practical project tools.