How Much Topsoil for 400 Square Feet? (Cubic Yards & Bags)

How Much Topsoil for 400 Square Feet?

4.94cubic yards

at 4 inches deep — about 178 bags (0.75 cu ft each) or 5.43 tons

Depth	Cubic yards	Cubic feet	40 lb bags (≈0.75 cu ft)	Approx. tons
2 in	2.47 yd³	66.7 ft³	89	2.72
4 in (typical)	4.94 yd³	133.3 ft³	178	5.43
6 in	7.41 yd³	200 ft³	267	8.15

New garden beds typically need 4–6 inches of topsoil, raised-bed topping 2–4 inches, and lawn leveling only ½–1 inch. Topsoil is heavy — about 1.1 tons per cubic yard — so plan delivery for anything over a yard.

The math: 400 sq ft × depth in feet ÷ 27 = cubic yards. One cubic yard of topsoil covers 162 sq ft at 2" · 81 sq ft at 4" · 54 sq ft at 6".

For lawn top-dressing at ½ inch, divide the ½-inch numbers from the 1-inch figure — or use the calculator with a custom depth.

How Much Topsoil for 400 Square Feet?

Different area?

Same area, other materials