GARDEN & OUTDOOR

Mulch Calculator

Estimate how much mulch you need to cover a garden area based on its dimensions and desired depth.

What would you like to calculate?

Enter garden dimensions

Enter the length, width, and mulch depth using the same unit. Measure the area you want to cover, excluding paths or spaces that do not need mulch.

Extra mulch allowance (optional)

%

Add up to 20% extra to allow for uneven ground, settling, or small measurement differences. Leave at 0% if you do not need an allowance.

How to use the Mulch Calculator

Select the shape of the area you want to cover, enter its measurements, and choose the appropriate units. Enter the depth of mulch you want to spread over the area.

You can optionally add an extra percentage to account for uneven ground, settling, or small measurement differences. The calculator applies this allowance to the estimated volume.

How is the mulch quantity calculated?

Rectangular area:

Length × Width × Mulch Depth

Circular area:

π × Radius² × Mulch Depth

Custom area:

Total Area × Mulch Depth

With extra allowance:

Base Volume × (1 + Extra Percentage ÷ 100)

Measurements are converted to metres before calculating volume. The result is then converted into litres and cubic feet.

1 cubic metre = 1,000 litres. 1 cubic metre ≈ 35.3147 cubic feet.

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