How Much Does 7 Tons of Road Base Cover?
How much does 7 tons of road base cover depends on how deep you spread it. At about 1.5 tons per cubic yard, 7 tons is roughly 4.7 cubic yards. Spread 6 inches deep, that covers about 252 square feet. Go thinner and it covers more; go deeper and it covers less.
Volume and tonnage calculator →How the coverage is figured
- Tons to cubic yards: 7 ÷ 1.5 = 4.7 yd³.
- Cubic yards to cubic feet: × 27 = 126 cu ft.
- Divide by depth in feet: at 6 inches (0.500 ft), 126 ÷ 0.500 = 252 sq ft.
Coverage of 7 tons at different depths
| Depth | Square feet covered | Square yards |
|---|---|---|
| 4 in | 378 | 42 |
| 6 in | 252 | 28 |
| 8 in | 189 | 21 |
About road base
Road base is meant to be compacted at close to the right moisture. Dry base rock does not lock up well; a light spray of water before rolling helps. Weight runs about 1.4 to 1.65 compacted tons per cubic yard, so treat the table as a planning range rather than an exact figure.
Putting 7 tons to use
For delivery, 7 tons usually fits on one smaller dump truck. Ask the supplier how they will split it. Spread from the pile with a loader, skid steer or wheelbarrow, then rake to depth before compacting if the material calls for it.
- Check depth as you go. Stakes marked at the target depth help keep the spread even.
- Expect some loss. Compaction and uneven ground use more than the flat-math figure. Keep about 10 percent in reserve.
- Ask about moisture. Wet material weighs more, so a ton of it covers less.
To run your own numbers, use the volume and tonnage calculator.
Where road base fits
Best suited to:
- Base under asphalt and concrete
- Gravel roads and drives
- Equipment and shed pads
Less suited to:
- 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 15x30 area at 4 inches takes about 8.3 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.
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- 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 cubic yards is 7 tons of road base?
About 4.7 cubic yards at 1.5 tons per yard.
How many square feet does 7 tons of road base cover at 6 inches?
About 252 square feet.
How many square feet does 7 tons cover at 4 inches?
About 378 square feet.
How much does a yard of road base weigh?
About 1.4 to 1.65 compacted tons.
Will 7 tons fit in one truck?
It depends on the truck. Single-axle dump trucks often carry under 10 tons and tandems around 13 to 16; your supplier will know their limits.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Does 5 Tons of Road Base Cover?
- How Much Does 6 Tons of Road Base Cover?
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