Topsoil calculator
How much topsoil? Enter area and depth for cubic yards and 40 lb bag count.
Inputs
The formula
cu yd = (L × W × depth/12) ÷ 27. 40 lb bag ≈ 0.75 cu ft.
Worked example
15 × 10 ft × 4" = 50 cu ft ≈ 1.85 cu yd or 67 bags.
Frequently asked
›How many bags in a cubic yard?
About 36 bags of 40 lb topsoil equal one cubic yard.
›How deep for a new lawn?
4–6" of screened topsoil before seed or sod.