How much MOT Type 1 for a 10 m2 base?

A 10 m2 MOT Type 1 base at 10 cm depth needs the volume, tonnes, and bag count shown below. This is a material quantity estimate only; compacted depth, ground preparation, and drainage need to be confirmed for the actual project.

How to use this project example

This example uses a 10 m2 finished area at 10 cm depth. It estimates 1 m3 before applying density and allowance, so it is best used as a quantity check after the finished area and depth are decided.

• Measure inside the edging line or finished border, not the rough excavation area.
• Keep sub-base, compaction, and drainage decisions separate from decorative gravel coverage.
• Split irregular shapes into sections and add the results together.

Ordering checks

The example uses 2 t/m3 density and 850 kg bags, giving 2.2 tonnes after allowance. Supplier bag weights, moisture, and delivery options can change the practical order.

• Confirm the supplier bulk-bag weight because 800 kg, 850 kg, and tonne bags are not interchangeable.
• Check delivery access and where the aggregate can be dropped.
• Keep a small allowance for edging losses, settlement, and topping up.

10 m2 Type 1 base gravel checks

Example inputs used

• Length: 5
• Width: 2
• Depth: 10
• Aggregate density: 2
• Bag size: 850

These are starting values for this example. Measure or confirm your own figures, then open them in the gravel calculator.

Assumptions and limits

• Uses 5 x 2 m as a simple 10 m2 base area.
• Uses 2.0 t/m3 as a planning density for MOT Type 1.
• Uses 850 kg as the bulk bag weight.
• Includes a 10% waste and settling allowance.

Related guide