Sizu Home › Calculators › Soil volume
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From the book — Chapter 2. Volume is area × depth, with every dimension in the same unit — so a depth given in inches gets divided by 12 first. A cubic yard is 27 cubic feet, which is why a bulk load goes so much further than a boot full of bags. New beds settle 15–20% over the first season, so overfilling slightly on purpose saves you topping off in spring.
Depth shortcuts: 2 in = ⅙ ft · 3 in = ¼ ft · 4 in = ⅓ ft · 6 in = ½ ft · 8 in = ⅔ ft. 1 cu ft ≈ 7.48 gallons. Everything stays in your browser.