How Much Does 4 Tons of Road Base Cover?
How much does 4 tons of road base cover depends on how deep you spread it. At about 1.5 tons per cubic yard, 4 tons is roughly 2.7 cubic yards. Spread 6 inches deep, that covers about 144 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: 4 ÷ 1.5 = 2.7 yd³.
- Cubic yards to cubic feet: × 27 = 72 cu ft.
- Divide by depth in feet: at 6 inches (0.500 ft), 72 ÷ 0.500 = 144 sq ft.
Coverage of 4 tons at different depths
| Depth | Square feet covered | Square yards |
|---|---|---|
| 4 in | 216 | 24 |
| 6 in | 144 | 16 |
| 8 in | 108 | 12 |
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.
Planning around 4 tons
4 tons is a light load that a single-axle dump truck can often handle, though legal limits vary by truck and state. 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.
Good and poor uses for road base
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
- Skipping drainage. Water sitting under any surface softens the base and leads to ruts and potholes.
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many cubic yards is 4 tons of road base?
About 2.7 cubic yards at 1.5 tons per yard.
How many square feet does 4 tons of road base cover at 6 inches?
About 144 square feet.
How many square feet does 4 tons cover at 4 inches?
About 216 square feet.
How much does a yard of road base weigh?
About 1.4 to 1.65 compacted tons.
Will 4 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 2 Tons of Road Base Cover?
- How Much Does 3 Tons of Road Base Cover?
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