Soil Calculator

Estimate the volume of soil needed for a rectangular bed at a chosen depth.

Length (m)Width (m)Depth (cm)Allowance (%)

Estimate only

This estimate uses the dimensions and allowance you enter. Measure the actual area and check the product label before buying soil.

Link to this tool

Copy this HTML to cite this tool from your own site or article.

Soil Calculator calculates volume in cubic metres and bag counts of topsoil needed for garden raised beds, borders, and lawn leveling.

Enter garden bed length, width, and desired soil depth in centimetres or metres.
Select soil settling allowance percentage (typically 10%).
Click Calculate to determine soil volume in cubic metres and bulk bag counts.
Review cubic metres and 25L / 800kg bulk bag estimates.

Bed: 3m x 1m, Depth: 20cm (0.2m), 10% settling allowance Result: 0.66 cubic metres of soil required (approx 1 bulk bag).

How many 25-litre bags equal one cubic metre?

One cubic metre equals 1,000 litres, which equals 40 standard 25-litre soil bags.

How much does a cubic metre of topsoil weigh?

Damp topsoil weighs approximately 1.2 to 1.4 tonnes per cubic metre.

Garden

Estimate the volume of compost needed for a rectangular bed at a chosen depth.

Garden

Estimate the volume of mulch needed for a rectangular bed at a chosen depth.

Garden

Estimate the volume of gravel needed for a rectangular area at a chosen depth.