Concrete Volume & Bags

Work out the volume of a slab, footing or column, and how many bags of mix it needs.

Size

Shape Slab or footing (L x W x D) Column or pier (round)

Length (m) Width (m)

Depth or height (mm)

Volume

0.00 m³

Bags of mix

Bag size 20 kg 25 kg 40 kg

0

Assumes about 0.01 m³ of mixed concrete per 20 kg bag, plus 5% waste.

Estimates only. Check against your engineer's specification and the bag manufacturer's yield.