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Find a calculator, bed size or guide

Will your beds fit, and can you reach the middle?

Enter your garden space and up to six beds. The drawing shows whether they fit with the paths you want, and whether you can reach the middle of each bed from the sides you can stand at.

Example: a bed 8 × 4 ft inside, 12 in of soil

22bags of 1.5 ft³ soil

or mix your own: 15 topsoil+8 compost

Bag size, ft³
32cubic feet of soil
1.2cubic yards
2,600 lbabout, as topsoil
  • About 2,600 lb: 3 trips in a vehicle with 1,250 lb of room after its driver, or one delivered load.
  • 1.2 cubic yards in bulk. Suppliers’ minimum loads run 1 to 5 yards, so get one delivered quote before buying 22 bags.
Soil depth · Bed 18 × 4 ft inside
Bed 1: 12 in of soil, 2 in left empty, 4 ft inside width. 12 in of soil 2 inleft empty 4 ft inside width

12 in of soil: room for carrots and most crops. On open ground, roots carry on into the soil below the bed. Depth by crop

At other bag sizes: 43 of 0.75 ft³ · 32 of 1 ft³ · 22 of 1.5 ft³ · 16 of 2 ft³ · 11 of 3 ft³

Bed 1: 12 in of soil.

Weight uses Sands and Soils screened topsoil at 2,200 lb a cubic yard. Choose another material in Soil order.

Measure the inside of the bed

Choose a bed to start with

Soil depth is the inside height less the space you leave empty at the top for mulch and watering.

Prepare the spot for this bed

Leave room to work

Use each bed’s outside footprint, including corners and legs, and the path width you need to walk, kneel or push a barrow. Reach is measured from the sides you mark as open. The bed width guide and the path width guide give the figures extension services publish.

Choose a bed width you can reach.