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Concrete & Masonry Calculators

Concrete Column Calculator

Concrete for round or rectangular columns and piers, with formwork area and rebar estimate.

Enter values

Results update as you type.

Result

Concrete required

1.134 m³

Per column
0.27 m³
Cement bags (50 kg)
13
Formwork area
14.4 m²
Main bars (4 per column)
16
Main bar length
56 m
Weight
2,722 kg

About the Concrete Column Calculator

Concrete for round or rectangular columns and piers, with formwork area and rebar estimate.

Also known as: column concrete volume, pier concrete, post hole concrete, pillar concrete.

How to use this calculator

  1. Enter shape, height, number of columns, mix ratio and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

Volume = cross-sectional area × height × number of columns

Worked example

Using the values pre-filled in the calculator above:

  • Shape: Rectangular
  • Width = 0.3 m
  • Depth = 0.3 m
  • Height = 3 m
  • Number of columns = 4
  • Mix ratio: 1 : 1 : 2 (M25) — 25 MPa — columns and beams

the calculator returns:

  • Concrete required: 1.134 m³
  • Per column: 0.27 m³
  • Cement bags (50 kg): 13
  • Formwork area: 14.4 m²