Concrete Calculator

Plan slabs, footings, post holes and solid concrete steps.

Your inputs

Rectangular slab: length × width × thickness
Measurement units
Material settings & waste

Editable planning allowance, not an optimized cutting plan.

Complete the required inputs to calculate. Check material settings for additional fields.

Results

Enter dimensions and check the material settings to calculate.

Use this calculator as a guide. Independently verify all calculations for accuracy before starting your project.

“Measure twice. Cut once”
-- dad