MEASURE ONCE. PLAN YOUR PURCHASE.

Concrete Column calculator.

Estimate repeated round or rectangular columns, with explicit internal voids.

CONCRETE

Your inputs

Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.

Cross-section

Waste allowance

Shortcuts only; choose your own allowance above.

Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

Column group 1

Specified column height

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Identical columns

Outer diameter

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Internal void diameter

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

YOUR ESTIMATE

∑

A clear estimate starts here.

Enter your dimensions and product details to see the quantity and purchase breakdown.

CONTINUE YOUR PLAN

Find the next material.

Keep the quantity, then use another tool for the remaining parts of your purchase.

Explore all calculators

Formula and assumptions

BEHIND THE NUMBERS

How this calculation works.

The cross-section is constant along each group’s height. Any inner rectangle must fit inside both outer dimensions; any inner diameter must fit inside the outer circle.

V = Σ((outer section − inner section) × height × count)Calculated with normalised units

A worked example

Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.

Cross-section: Round
Waste allowance: 10 %
Specified column height: 3 m
Identical columns: 2
Outer diameter: 400 mm
Internal void diameter: 200 mm

Concrete to order: 0.62 m³

Before you purchase

Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.

Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.

Check your purchase assumptions

Measure shaft height separately from a tapered base Use measured internal dimensions for round concrete forms Check void deductions against their own concrete component When to pool packs across work phases

Connected work guides and comparisons

Explore concrete component volumes

Browse all work types

Compare supplied alternatives and quantity changes

Browse all quantity scenarios

Concrete Column calculator.

Your inputs

A clear estimate starts here.

Find the next material.

How this calculation works.

A worked example

Before you purchase

Check your purchase assumptions

Keep the project moving.

Connected work guides and comparisons

Compare supplied alternatives and quantity changes