How Much Road Base for 4,000 Square Feet?
How much road base for 4,000 square feet depends on depth. At 6 inches you need about 74.07 cubic yards, roughly 111.1 tons at 1.5 tons per yard. At 4 inches the order drops to 74.1 tons.
Volume and tonnage calculator →Road base for 4,000 sq ft by depth
| Depth | Cubic yards | Tons | Tons +10% |
|---|---|---|---|
| 4 in | 49.38 | 74.1 | 81.5 |
| 6 in | 74.07 | 111.1 | 122.2 |
| 8 in | 98.77 | 148.1 | 163.0 |
Working it out
- 4,000 sq ft × (6 ÷ 12) ft = 2,000.0 cubic feet.
- ÷ 27 = 74.07 cubic yards.
- × 1.5 tons per yard = 111.1 tons.
About road base
Road base (also called base rock, ABC, or Class 2 base in different states) is a graded mix of stone and fines made to compact into a load-bearing layer. Typical weight: 1.4 to 1.65 compacted tons per cubic yard.
Ordering checklist
- Measure odd shapes in pieces. Split curves and L-shapes into rectangles and add them.
- Add a margin. About 10 percent covers compaction and low spots.
- Bulk or bags. Bulk delivery is the practical choice here.
- Prep first. Remove sod, compact the subgrade and set edging before the stone arrives.
Use the volume and tonnage calculator for any other size.
Where road base fits
Good uses:
- Base under asphalt and concrete
- Gravel roads and drives
- Equipment and shed pads
Poor fit for:
- Drainage layers
- Decorative surfaces
- Surfaces that will stay uncompacted
Quick reference numbers
- Per inch over 100 sq ft: about 0.46 tons of road base (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.6 tons.
- Another size for comparison: a 8x16 area at 4 inches takes about 2.4 tons.
- Weight used here: about 1.5 tons per cubic yard.
Where estimates go wrong
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
Questions people ask
How many tons of road base for 4,000 square feet?
About 111.1 tons at 6 inches deep.
How many cubic yards of road base for 4,000 square feet?
About 74.07 yards at 6 inches.
How much road base for 4,000 square feet at 4 inches?
About 74.1 tons, or 49.38 cubic yards.
How much does a yard of road base weigh?
About 1.4 to 1.65 compacted tons.
Should I add extra?
Yes, about 10 percent is a common allowance.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Ton of Gravel Cover? Depth Chart
- How Much Road Base for 3,000 Square Feet?
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