How much landscape rock for 100 square feet?
Covering 100 sq ft with rock 2 inches deep takes 0.65 cubic yards — about 0.84 tons of river rock (5% extra included).
Change the numbers
The calculator below is pre-filled for this project. Adjust any value — including feet and inches — and the results update instantly.
Weights per cubic yard are typical; ask your landscape yard for theirs.
Your results
Rock needed0.84 tons
Volume0.65 cu yd
Weight1,685 lb
0.5 cu ft bags35
Rock for 100 sq ft by depth
| Depth | Cubic yards | Tons (river rock) | Tons (lava rock) |
|---|
| 2 in | 0.65 | 0.84 | 0.32 |
| 3 in | 0.97 | 1.26 | 0.49 |
| 4 in | 1.3 | 1.69 | 0.65 |
The math
100 × 2 in ÷ 12 × 1.05 = 17.5 cu ft = 0.65 cu yd
× 1.3 tons/yd³ = 0.84 tons
Common questions
How many tons of river rock for 100 sq ft?
About 0.84 tons at 2 inches deep.
Want the full method, tips and other sizes? See the landscape rock calculator guide.
Last reviewed November 1, 2026. Results are estimates — confirm with your supplier.
Similar sizes
Related calculators