Concrete Calculator

Simple concrete estimates for slabs, holes, tubes, curbs, and stairs.

Slabs, Square Footings, or Walls

Length (l)

Width (w)

Thickness / Height (h)

Slab diagram

Post Holes / Columns

Diameter

Depth / Height

Post hole diagram

Tubes / Circular Slabs

Outer Diameter

Inner Diameter

Length / Height

Tube diagram

Curbs & Gutters

Curb Depth

Gutter Width

Curb Height

Flag Thickness

Length

Curb diagram

Stairs

Run

Rise

Width

Platform Depth

Number of risers

Stairs diagram

Quantity

Waste allowance%

Result

Volume: 0.00 cubic feet

or 0.00 cubic yards

or 0.00 cubic metres

Using pre-mixed concrete density of 0 kg/m³:

Weight needed0.00 lbs / 0.00 kg

20kg bags0 bags

25kg bags0 bags

60-lb bags0 bags

80-lb bags0 bags

* Different concrete mixes can have different densities. Always confirm with your supplier.