Home & Construction calculator

Mulch and Soil Calculator

Measure a rectangular area, choose the finished depth and enter the bag size used by the supplier.

Calculated privately on your device
No account. Formula and assumptions are shown below.

Calculator inputs

Mulch and soil details

Formula & disclaimer

Order Volume = Length × Width × Depth × (1 + Waste); Bags = Ceiling(Order Litres ÷ Litres per Bag)

View assumptions

Formula reviewCalcs at Hand Editorial TeamVerified 31 August 2026 · automated checks included

Three useful checks, kept deliberately short.

What this result includes

The order volume is about 1.58 m³, equivalent to 40 whole 40 L bags.

A practical example

A 6 m × 3 m bed, 8 cm deep, 40 L bags and 10% waste: Convert depth to metres · Calculate cubic volume · Add waste and round bags up.

Common input mistake

For irregular beds, divide the area into simpler shapes and add the volumes.

Order Volume = Length × Width × Depth × (1 + Waste); Bags = Ceiling(Order Litres ÷ Litres per Bag)

Loose material may settle after spreading, so a waste or settlement allowance is useful.

Keep in mind: Confirm bag volume, settlement and minimum delivery quantities with the supplier.

Produced byCalcs at Hand Editorial Team

Last formula check31 August 2026

Review methodKnown examples + boundary cases