Raised Bed Soil Calculator
How much soil to fill a raised garden bed
Filling a raised garden bed? Enter the bed length, width and height (as the depth) to get the soil needed in cubic feet, cubic yards and bags.
The best raised-bed mix
A popular blend is roughly ⅓ topsoil, ⅓ compost, ⅓ aeration (peat or coco coir). Enter the bed's inside height as the depth. Beds settle, so fill to the top.
Frequently asked questions
How much soil for a 4x8 raised bed?
A 4×8 ft bed 12 inches deep needs about 32 cubic feet (≈1.2 cubic yards).
Can I just use topsoil in a raised bed?
Mix topsoil with compost and an aerator — pure topsoil compacts and drains poorly.