Landscaping

Soil & raised beds calculator

Estimate fill for a rectangular bed in litres, cubic yards and bags, with a settlement allowance.

Your project

ft
ft
in
%
Extra material for cuts, spillage or irregular edges. Adjust for your project.
ft³
Optional. Enter your supplier’s price; 0 leaves cost out.

YOUR ESTIMATE

Enter your measurements and select Calculate estimate.

Planning estimate only. Confirm the product’s coverage and your measurements before ordering.

How to use this estimate

Use the internal dimensions of a raised bed, excluding its timber or masonry walls. Account for drainage layers and existing fill by entering only the missing depth. Soil settles differently with composition, moisture and placement; the allowance is editable and is not a universal compaction factor.

The calculation

Fill volume = length × width × depth. Add the selected allowance, then divide by the bag volume and round up.

A worked example

A 2 × 1 m raised bed filled 0.3 m deep holds 600 L. At 10% extra, 660 L requires 17 bags of 40 L.

This estimates volume, not soil suitability or bed load capacity. Structural support for rooftop or balcony beds needs professional review.

Common questions

Does this include delivery?

No. Material cost uses your entered unit price. Add delivery, tax, access charges and minimum-order fees from the supplier.

References & method

Material volume reference. See how we check calculations. Reference links provide context; no supplier endorses this site.