18th November 2019

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19

How many cubic feet are in a 40 pound bag of topsoil?

a 40 lb bag of compost equals 0.75 cubic feet. i made 4 boxes 4'x4'x6" and used approx 2-3 bags of compost per box, all in all It took one 3.3cu ft bag of peat moss (compressed) and about 1 1/4 4cu ft bags of medium vermiculite.

How do you calculate how much dirt you need?

EXAMPLE #1: We need soil for two 8′ x 4′ x 18″ raised beds.
  1. Convert all dimensions into feet (18” ÷ 12” = 1.5')
  2. Multiply length x width x height (16' x 4' x 1.5' = 96 cubic feet)
  3. Divide (96 ÷ 27 = 3.56 cubic yards)
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