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Concrete Volume Calculator

Calculate concrete volume in cubic yards, cubic meters, and bags for slabs, footings, columns, stairs, and curbs. Includes bags, cost, and material estimates.

Concrete Shape & Dimensions

Select your structure type and enter dimensions

Structure Type
Dimensions
Units & Quantity
Cost & Materials
Volume Needed
--
cubic yards
-- m³
Bags of Concrete
--
80-lb bags
Material Cost
$--
concrete material only
Weight
-- lbs
~145 lbs/cu ft

Typical Thickness Guide

Sidewalk / Path3–4 in
Driveway4–6 in
Patio / Slab4 in
Garage floor4–6 in
Foundation8–10 in

Bag Coverage (80-lb)

1 bag yields0.60 cu ft
27 cu ft= 1 cu yd
45 bags≈ 1 cu yd
Price range$120–160/yd

Concrete Volume Formulas

Slab

L × W × D

Column / Cylinder

π × r² × H

Stairs

½ × rise × run × W × steps

Footing

L × W × D