How much topsoil do you need for 100 square feet?

Spreading topsoil 4 inches deep over 100 sq ft takes 1.23 cubic yards — roughly 1.4 tons, or 45 bags of 0.75 cu ft.

Change the numbers

The calculator below is pre-filled for this project. Adjust any value — including feet and inches — and the results update instantly.

Weight uses about 1.15 tons per cubic yard; wet soil weighs more.

Topsoil needed1.23 cu yd

Approx. weight1.42 tons

0.75 cu ft bags45

1 cu ft bags34

Depth	Cubic yards	Approx. tons	0.75 cu ft bags
1 in	0.31	0.35	12
2 in	0.62	0.71	23
4 in	1.23	1.42	45
6 in	1.85	2.13	67

Small jobs like this can be done with bags, though a single bulk yard may still be cheaper.

100 × 4 in ÷ 12 ÷ 27 = 1.23 cu yd

How many yards of topsoil for 100 sq ft?

1.23 cubic yards at 4 inches deep; 0.62 at 2 inches.

Want the full method, tips and other sizes? See the topsoil calculator guide.

Last reviewed November 1, 2026. Results are estimates — confirm with your supplier.