Soil calculator

Enter each bed or lawn area and the depth of soil. Get volume in cubic metres and litres, and bags when you enter the bag volume.

How the calculation works

Add length × width × entered depth for every section, then multiply by (1 + allowance / 100). Divide by bag volume or yield and round up whole bags.

Measurements and packaging

• Depth is the finished depth of added soil.
• Bag volume is printed on the bag.
• Density is optional and never assumed.
• Allowance defaults to 0%.

Worked example

A 3 × 3 m bed at an entered depth of 0.1 m needs 0.9 m³, or 900 litres. At 40 litres per bag, buy 23 bags.

Frequently asked questions

Can I calculate without creating an account?

Yes. Calculations and locally saved projects need no registration. Saving is optional; results are available before creating a project.

Are prices provided?

No. Enter your supplier’s product coverage, packaging and price. Missing prices are never invented.

Can I reuse measurements?

Save to a named project area, then open a compatible calculator from that area.

Estimates are based on your measurements and product information. Confirm package coverage and quantities with your supplier before purchasing. Not structural or building-code advice.