River Rock Calculator
Updated Formulas shown
River rock is usually laid 2–3 in deep for 1–3 in stones, deeper for larger cobbles. A 20 × 4 ft bed at 3 in needs about 0.8 yd³ (1 ton).
River rock needed
0.78 yd³
1.01 tons at 2,600 lb/yd³
- Weight
- 1.01 tons2,022 lb · 0.92 t
- Cubic feet
- 21 ft³
- Cubic meters
- 0.59 m³
- Area covered
- 80 ft²
Densities are typical loose figures; ask your supplier for theirs. Delivery minimums are often 1–3 yd³.
Quick reference
| Area | 2 in deep | 3 in deep | 4 in deep |
|---|---|---|---|
| 50 ft² | 0.31 yd³ · 0.4 t | 0.46 yd³ · 0.6 t | 0.62 yd³ · 0.8 t |
| 100 ft² | 0.62 yd³ · 0.8 t | 0.93 yd³ · 1.2 t | 1.23 yd³ · 1.6 t |
| 200 ft² | 1.23 yd³ · 1.6 t | 1.85 yd³ · 2.41 t | 2.47 yd³ · 3.21 t |
| 300 ft² | 1.85 yd³ · 2.41 t | 2.78 yd³ · 3.61 t | 3.7 yd³ · 4.81 t |
| 500 ft² | 3.09 yd³ · 4.01 t | 4.63 yd³ · 6.02 t | 6.17 yd³ · 8.02 t |
| 1000 ft² | 6.17 yd³ · 8.02 t | 9.26 yd³ · 12.04 t | 12.35 yd³ · 16.05 t |
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Frequently asked questions
How many square feet does a ton of river rock cover?
About 80 ft² at 3 inches deep, 120 ft² at 2 inches.
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Estimates only. Check quantities with your supplier or contractor before ordering.