Concrete Calculator
Estimate how many cubic yards of concrete you need.
Interactive calculator
%
Result
Cubic yards
Includes 10% waste
2.72
Cubic feet
66.67
80-lb bags (≈0.6 ft³)
112
What it is
Buy enough concrete to do the job without paying for a half-truck you don't need. This calculator estimates cubic yards from your slab dimensions.
The formula
Cubic yards = (L × W × D/12) ÷ 27 Add 5–10% waste.
Why it matters
Understanding concrete calculator helps you make a better-informed decision before you commit money or time.
Worked examples
Try the example
Use the defaults above as a starting point — then adjust the inputs to match your situation.
Common pitfalls
- Forgetting to convert depth from inches to feet.
- Skipping a 5–10% waste buffer.
Frequently asked questions
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