Gravel for 20×20 ft at different depths
Includes 10% extra for compaction.
| Depth | Cubic yards | Tons (pea gravel) | Tons (crusher run) |
|---|---|---|---|
| 2 in | 2.72 | 3.8 | 4.07 |
| 3 in | 4.07 | 5.7 | 6.11 |
| 4 in | 5.43 | 7.6 | 8.15 |
| 6 in | 8.15 | 11.41 | 12.22 |
What to use for this size
A 20×20 area is driveway-sized. For a driveway, a common build is 4 inches of compacted crusher run topped with 2–3 inches of #57 stone, over landscape fabric on soft soil.
The math
20 × 20 × (4 ÷ 12) = 133.3 cu ft
× 1.10 extra = 146.7 cu ft = 5.43 cu yd
× 1.4 tons/yd³ = 7.6 tons
Common questions
How many tons of gravel for a 20x20 area?
About 7.6 tons at 4 inches deep (pea gravel, 10% extra included). At 6 inches it's 11.4 tons.
How many yards of gravel for 20x20?
5.43 cubic yards at 4 inches deep, including 10% for compaction.
Want the full method, tips and other sizes? See the gravel calculator guide.