Estimate the concrete for a floor — garage, basement or workshop — in cubic yards, bags and total cost.
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How it works
Cubic feet = Length × Width × (Thickness ÷ 12) · Cubic yards = Cubic feet ÷ 27 · Cost = Cubic yards × price per yard. Floors are usually 4 in thick.
Example
A 20 × 20 ft floor at 4 in is about 4.9 cubic yards — roughly $740 at $150/yard.
Frequently asked questions
- Bags or ready-mix?
- Bags suit small jobs; over ~1 cubic yard, ready-mix delivery is usually cheaper. Add ~10% for waste.