Sub-Base (MOT Type 1) Calculator

Calculate Type 1 sub-base requirements from area, depth and a standard bulk density.

Sub-base needed for a 2.4m by 1m area at 50mm

For an area measuring 2.4 metres by 1 metres at a depth of 50mm, this estimate covers volume, tonnage and bulk bag equivalents using the default density settings below.

  • Volume0.12 m³
  • Approx tonnage0.26 tonnes
  • Bulk bags1

Results - Sub-Base (MOT Type 1) Calculator

  • Volume0.12 m³
  • Approx tonnage0.26 tonnes
  • Bulk bags1

Sub-base notes

Use this for MOT Type 1 beneath patios, driveways and paving. The density can be adjusted for the source aggregate if needed.

Disclaimer

Material quantities shown are estimates for guidance only. Although typical UK wastage and compaction allowances have been included, actual requirements may vary depending on site conditions, installation methods, and material differences. Please confirm quantities with your installer or supplier before ordering. We accept no liability for inaccuracies, financial loss, or delays arising from the use of these estimates.