How Much Does 20 Tons of Gravel Cover?
How much does 20 tons of gravel cover depends on how deep you spread it. At about 1.4 tons per cubic yard, 20 tons is roughly 14.3 cubic yards. Spread 4 inches deep, that covers about 1,157 square feet. Halve the depth and you roughly double the area.
Volume and tonnage calculator →How the coverage is figured
- Tons to cubic yards: 20 ÷ 1.4 = 14.3 yd³.
- Cubic yards to cubic feet: × 27 = 386 cu ft.
- Divide by depth in feet: at 4 inches (0.333 ft), 386 ÷ 0.333 = 1,157 sq ft.
Coverage of 20 tons at different depths
| Depth | Square feet covered | Square yards |
|---|---|---|
| 2 in | 2,314 | 257 |
| 3 in | 1,543 | 171 |
| 4 in | 1,157 | 129 |
| 6 in | 771 | 86 |
About gravel
Plain gravel is a loose term. Yards use it for rounded bank or river stone as well as for crushed rock, so ask whether the load is washed, crushed or a mix before you lock in a tonnage. Weight runs about 1.3 to 1.5 tons per cubic yard, so treat the table as a planning range rather than an exact figure.
Putting 20 tons to use
For delivery, 20 tons means multiple trips or a larger 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.
Good and poor uses for gravel
Works well for:
- Rural driveways and lanes where low upfront cost matters
- Drainage areas and around downspouts
- Temporary access while a site is under construction
Think twice for:
- Steep slopes, where loose stone washes downhill
- Spots plowed often, since plows push gravel into the lawn
- Areas next to doors, because stone tracks inside
Quick reference numbers
- Per inch over 100 sq ft: about 0.43 tons of gravel (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.3 tons.
- Another size for comparison: a 8x16 area at 3 inches takes about 1.7 tons.
- Weight used here: about 1.4 tons per cubic yard.
Where estimates go wrong
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
- Ordering exactly the math. Uneven ground and spillage nearly always need a little more than the flat calculation.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many cubic yards is 20 tons of gravel?
About 14.3 cubic yards at 1.4 tons per yard.
How many square feet does 20 tons of gravel cover at 4 inches?
About 1,157 square feet.
How many square feet does 20 tons cover at 2 inches?
About 2,314 square feet.
How much does a yard of gravel weigh?
About 1.3 to 1.5 tons.
Will 20 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
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Many Tons of Gravel in a Dump Truck? Loads and Coverage
- How Much Does 18 Tons of Gravel Cover?
- How Much Does 19 Tons of Gravel Cover?
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