Why add waste allowance for concrete?
Ordering slightly above exact volume helps cover grade variance and handling losses.
Concrete Calculator
Estimate concrete volume for slabs with waste allowance and optional unit cost.
Assumptions
- Volume uses slab geometry and converts cubic feet to cubic yards.
- Cost range uses the entered unit cost as a base estimate with a simple planning spread.
How to use
- Enter slab length, width, and thickness.
- Set waste allowance.
- Optionally enter cost per cubic yard.
- Run calculation to see volume and cost estimate.
FAQ
Related calculators
Always confirm requirements with your contractor and local code expectations.