Biology

Raised Bed Soil Calculator

Find soil volume to fill a raised bed.

Length

Width

Height

Calculated Output

Soil volume 32

Volume 1.185

Bags (1.5 ft³) 22

Formula: volume = length × width × height

Step-by-Step Breakdown

1. Values used:

2. Length = 8

3. Width = 4

4. Height = 1

6. Soil volume = Length x Width = 8 x 4 = 32

7. Volume = 1.185

8. Bags (1.5 ft³) = 22

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The math behind it

volume = length × width × height (all in feet).

8×4×1 ft → 32 ft³ ≈ 22 bags.

Soil mix?

A common blend is ~60% topsoil, 30% compost, 10% aeration.