How to calculate concrete
Yards = L × W × (D ÷ 12) ÷ 27
Worked example. Concrete needed: 1.23 cubic yards.
Example inputs — Length: 10 ft; Width: 10 ft; Thickness: 4 in. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Multiply length × width × thickness to get volume, then convert cubic feet to cubic yards.
Assumptions & limitations
- Material estimates only — buy 5–10% extra for waste and cuts.
- Check coverage figures on your product label.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Should I order extra?
Yes, add 5–10% for spillage and uneven ground.