Sub-Base (MOT Type 1) Calculator

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

Results - Sub-Base (MOT Type 1) Calculator

Enter your measurements and press calculate.

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.

Popular sizes

Popular pre-filled calculator pages.

2m × 1m × 40mm
Sub-Base (MOT Type 1) Calculator
2m × 1m × 50mm
Sub-Base (MOT Type 1) Calculator
2m × 1.2m × 40mm
Sub-Base (MOT Type 1) Calculator
2.4m × 1m × 40mm
Sub-Base (MOT Type 1) Calculator
2m × 1m × 75mm
Sub-Base (MOT Type 1) Calculator
2m × 1.2m × 50mm
Sub-Base (MOT Type 1) Calculator
2.4m × 1m × 50mm
Sub-Base (MOT Type 1) Calculator
2m × 1m × 100mm
Sub-Base (MOT Type 1) Calculator
2.4m × 1.2m × 40mm
Sub-Base (MOT Type 1) Calculator
2m × 1.2m × 75mm
Sub-Base (MOT Type 1) Calculator
2m × 1.5m × 40mm
Sub-Base (MOT Type 1) Calculator
2.4m × 1m × 75mm
Sub-Base (MOT Type 1) Calculator

Pre-filled calculator pages help visitors jump straight to a useful estimate and then refine the result 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.