Gravel for a 4×20 area
0.99 cubic yards (1.4 tons)
of gravel for 80 sq ft at 4 inches deep. Add about 5% for compaction and spillage.
A 4×20 foot area is 80 square feet. Use 2 to 3 inches for a path or decorative cover, 4 inches for a patio, shed or slab base, and 6 to 8 inches (in layers) for a driveway or parking pad.
Gravel for 4×20 by depth
| Depth | Cubic yards | Tons | 50 lb bags |
|---|---|---|---|
| 2 in | 0.49 | 0.7 | 28 |
| 3 in | 0.74 | 1 | 42 |
| 4 in | 0.99 | 1.4 | 56 |
| 6 in | 1.48 | 2.1 | 83 |
| 8 in | 1.98 | 2.8 | 111 |
| 12 in | 2.96 | 4.1 | 166 |
How it’s worked out
- 20 × 4 × 4 in ÷ 12 = 26.67 cu ft.
- 26.67 ÷ 27 = 0.988 cu yd.
- 0.988 × 1.4 tons per yard = 1.38 tons.
Change the numbers
Other area sizes
- 4×16 area
- 4×24 area
- 4×15 area
- 4×25 area
- 4×12 area
- 4×10 area
- 4×30 area
- 6×20 area
- 4×8 area
- 4×6 area
- 4×4 area
- 4×40 area
Questions
- How much gravel do I need for a 4×20 area?
- 0.99 cubic yards (about 1.4 tons) at 4 inches deep, and 1.48 cubic yards (2.1 tons) at 6 inches.
- How many tons of gravel for 4×20?
- About 1.4 tons at 4 inches, assuming 1.4 tons per cubic yard. Crushed stone with fines can weigh up to 1.5 tons a yard.
- How many bags of gravel for 4×20?
- About 56 bags of 50 lb at 4 inches deep. Above a ton or so, bulk delivery is much cheaper.
- How much does gravel for 4×20 cost?
- About $69 at $50 a ton for a 4 inch layer, before delivery. Prices range from about $15 to $75 a ton depending on stone type.