Construction calculator
Concrete Volume Calculator
Estimate concrete for a rectangular slab, pad, footing, or similar pour.
What the result means
The calculator converts every dimension to feet, finds the rectangular volume, then adds the selected waste allowance. It reports cubic feet, cubic yards, cubic meters, and an estimated number of bags.
Before ordering
- Measure several points when the excavation or base is uneven.
- Use the actual finished thickness, not the nominal lumber size of the form.
- Order quantities and truck minimums vary by supplier.
- Bag yields differ by product and moisture content.