Gravel for 12×20 ft at different depths
Includes 10% extra for compaction.
| Depth | Cubic yards | Tons (pea gravel) | Tons (crusher run) |
|---|---|---|---|
| 2 in | 1.63 | 2.28 | 2.44 |
| 3 in | 2.44 | 3.42 | 3.67 |
| 4 in | 3.26 | 4.56 | 4.89 |
| 6 in | 4.89 | 6.84 | 7.33 |
What to use for this size
A 12×20 area suits a patio base, parking pad, shed base or path. Under pavers or a shed, use 4–6 inches of compacted crusher run; for a decorative area, 2–3 inches of pea gravel over fabric is plenty.
The math
12 × 20 × (4 ÷ 12) = 80 cu ft
× 1.10 extra = 88 cu ft = 3.26 cu yd
× 1.4 tons/yd³ = 4.56 tons
Common questions
How many tons of gravel for a 12x20 area?
About 4.6 tons at 4 inches deep (pea gravel, 10% extra included). At 6 inches it's 6.8 tons.
How many yards of gravel for 12x20?
3.26 cubic yards at 4 inches deep, including 10% for compaction.
Want the full method, tips and other sizes? See the gravel calculator guide.