Concrete rectangular slab volume

How to use this calculator

1. Enter slab length (m). Use the unit shown beside the field.
2. Enter slab width (m). Use the unit shown beside the field.
3. Enter thickness (mm). Use the unit shown beside the field.
4. Select Calculate and review the result. Select Reset to restore the example inputs.

How the calculation works

Slab length (m)*Slab width (m)*Thickness (mm)/1000

Worked example

Slab length (m) = 5; Slab width (m) = 4; Thickness (mm) = 100. Result: 2 m³.

Understand your result

Estimate volume for a rectangular concrete slab. The result is expressed in m³.

Assumptions and limitations

A quantity estimate only; not structural design or an assessment of required thickness. Results are rounded for display.

Questions about this tool