Length unit
Width unit
Thickness or height unit
Examples & guide

Concrete calculator

How to use

Estimate concrete volume, weight and whole bags for slabs, footings, tubes, curbs and stairs.

Limits

Volume equals the cross-sectional area times length. The default uses 133 lb/ft³ for pounds and 2,130 kg/m³ for kilograms. A custom density converts both results from one value. Add any allowance before rounding an order to whole bags.

Examples & guide