Topsoil Calculator
Cubic yards & bags of topsoil for lawns and beds
Filling a bed or leveling a lawn? Enter the area and depth to get the cubic yards of bulk topsoil and the equivalent 40 lb bags.
How much topsoil do I need?
Topsoil is area × depth. Use 1–2 inches for leveling, 6–12 inches for new beds.
Bags vs. bulk
A 40 lb bag holds ~0.75 ft³ (≈36 bags per cubic yard). Bulk is far cheaper past a small bed.
Frequently asked questions
How many 40 lb bags of topsoil in a cubic yard?
About 36 (27 ÷ 0.75).
How deep should topsoil be for new grass?
4–6 inches of quality topsoil for a healthy new lawn; 1–2 inches to topdress.