Mulch calculator

Measure each bed, enter the mulch depth and an optional allowance, then add the bag volume to see whole bags and the surplus.

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

• Each bed is a rectangle. Add several beds.
• Depth is the layer depth you plan to spread.
• Bag volume is printed on the bag.
• Allowance defaults to 0%.

Worked example

A 3 × 2 m bed at an entered depth of 0.05 m needs 0.3 m³, or 300 litres. At 40 litres per bag, buy 8 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.