Gravel for a 20×40 area
9.88 cubic yards (13.8 tons)
of gravel for 800 sq ft at 4 inches deep. Add about 5% for compaction and spillage.
A 20×40 foot area is 800 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 20×40 by depth
| Depth | Cubic yards | Tons | 50 lb bags |
|---|---|---|---|
| 2 in | 4.94 | 6.9 | 277 |
| 3 in | 7.41 | 10.4 | 415 |
| 4 in | 9.88 | 13.8 | 554 |
| 6 in | 14.81 | 20.7 | 830 |
| 8 in | 19.75 | 27.7 | 1107 |
| 12 in | 29.63 | 41.5 | 1660 |
How it’s worked out
- 40 × 20 × 4 in ÷ 12 = 266.67 cu ft.
- 266.67 ÷ 27 = 9.877 cu yd.
- 9.877 × 1.4 tons per yard = 13.83 tons.
Change the numbers
Other area sizes
- 16×40 area
- 24×40 area
- 15×40 area
- 20×30 area
- 20×50 area
- 25×40 area
- 20×25 area
- 12×40 area
- 20×24 area
- 10×40 area
- 20×20 area
- 20×60 area
Questions
- How much gravel do I need for a 20×40 area?
- 9.88 cubic yards (about 13.8 tons) at 4 inches deep, and 14.81 cubic yards (20.7 tons) at 6 inches.
- How many tons of gravel for 20×40?
- About 13.8 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 20×40?
- About 554 bags of 50 lb at 4 inches deep. Above a ton or so, bulk delivery is much cheaper.
- How much does gravel for 20×40 cost?
- About $691 at $50 a ton for a 4 inch layer, before delivery. Prices range from about $15 to $75 a ton depending on stone type.