ConcreteCalculatorHQ

Concrete Calculator

Calculate the volume and weight of concrete necessary to cover a given area. Supports slabs, footings, post holes, walls, columns, curb & gutter, circular pours, and stairs. Purchasing slightly more concrete than the estimated result reduces the probability of having insufficient concrete.

Units
Concrete Volume1.36 yd³
Bags
62 × 80 lb
Weight
5,500 lb
Loads
1

How to use this concrete calculator

  • Choose a form (slab, footing, post holes, wall, stairs, etc.)
  • Select imperial or metric units (or change per-field units)
  • Enter your dimensions and quantity
  • Set waste and density (optional but recommended)
  • Add prices for a quick cost estimate (optional)
  • Use “Copy link” to share, or “Print” to save a summary

Common volume presets

Volume = Length × Width × Thickness

10×10 slab 4in
10 ft × 10 ft × 4 in
1.23 yd³
20×20 patio 4in
20 ft × 20 ft × 4 in
4.94 yd³
20×10 patio 4in
20 ft × 10 ft × 4 in
2.47 yd³
Fence posts (4)
10 in dia × 36 in deep
0.29 yd³