Concrete Pour Calculator
Calculate rectangular, L-shaped, T-shaped or multiple concrete pours, then get an order quantity and packing list.
Enter your project details
Each dimension can use its own unit—for example feet for length and inches for thickness. Package counts are rounded up.
Formula and calculation steps
Cubic yards = area × depth (ft) ÷ 27- Calculate the selected footprint area: 120 ft².
- Multiply by 0.33 ft depth and divide by 27.
- Add 10% allowance.
Worked example
A patio and walkway can be entered as separate pours; each gets its own dimensions and the total is ordered once.
How to use this calculator
- Choose the pour shape or add multiple segments.
- Enter length, width and depth with the units on your plan.
- Set waste % and optional local price, then read volume, order quantity and packing.
Example: A patio and walkway can be entered as separate pours; each gets its own dimensions and the total is ordered once.
Questions about this calculator
How do I calculate concrete for an L-shaped pour?
Select L-shape or enter each rectangle as a separate segment so the calculator totals both legs correctly.
Does this include waste?
Yes. Enter your waste percentage and the order quantity rounds up after waste is applied.
Can I use mixed units?
Yes. Choose feet, inches, metres or centimetres and the calculator converts each input before calculating.
Is this a final material order?
No. Confirm drawings, product coverage, local code and site conditions before buying or building.
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<iframe src="https://www.buildcalclab.com/embed/concrete-calculator/?theme=light" width="100%" height="640" title="BuildWise calculator" style="border:0;max-width:720px"></iframe>Assumptions and references
Results are estimates based on the dimensions and values you enter. Verify final quantities, manufacturer coverage and site-specific requirements before ordering.
Last reviewed: July 2026 · Read our calculation methodology