Measured the slab area?
Calculate the cubic yards.
Convert plan-measured square feet and an explicit thickness into concrete volume. See the base quantity, entered waste, and optional supplier-increment rounding as separate numbers.
Runs in your browser · No account · No project values sent to Takeoff
Area-to-volume conversion
Concrete yardage calculator
Thickness is converted from inches to feet. Area times thickness gives cubic feet; dividing by 27 gives cubic yards. Waste and supplier rounding remain visible rather than being folded into one unexplained result.
Calculated planning quantity
- Measured area
- 2,400.00 sq ft
- Base volume
- 1,200.00 cu ft
- Base volume
- 44.44 cu yd
- Entered waste
- 3.11 cu yd
- Waste-adjusted volume
- 47.56 cu yd
- Supplier rounding
- 0.19 cu yd
- Rounded order volume
- 47.75 cu yd
The adjusted volume is rounded up to the entered 0.25-cubic-yard supplier increment, adding 0.19 cubic yards beyond the waste-adjusted result.
Planning aid only. This calculator does not establish the measured area or required thickness and does not account for subgrade variation, thickened edges, footings, beams, slopes, over-excavation, displacement, pump or truck limits, minimum loads, hot-weather loss, placement sequence, local code, engineered design, supplier policies, or field conditions. Confirm the drawings, elevations, yield, mix, supplier increment, and final order with the engineer, supplier, and field team.
Worked slab example
See 2,400 square feet become cubic yards.
The default example uses a 2,400-square-foot slab at six inches thick. That produces 44.44 cubic yards before waste and 47.56 cubic yards after an explicit 7% waste factor.
- Measured area
- 2,400 SF
- Thickness
- 6 in
- Base cubic feet
- 1,200.00 CF
- Base volume
- 44.44 CY
- Waste factor
- 7%
- Adjusted volume
- 47.56 CY
The optional 47.75-CY result rounds up to the entered supplier increment. Replace the thickness, waste, and order increment with the project requirements and confirm the final order with your supplier.
