PRACTICAL TOOLS · MATERIAL ESTIMATES
Concrete Calculator
Estimate concrete volume for a rectangular slab or footing with an adjustable order allowance.
This estimates volume only. Reinforcement, mix strength and structural dimensions must come from the project specification.
How the calculation works
Concrete volume = length × width × depth. Order volume = volume × (1 + extra percentage ÷ 100).
Before you order
Measure your project, use consistent units and replace example assumptions with your own product or project specifications. These tools estimate quantities; they do not specify structural design or guarantee purchase quantities.