How Much Gravel for 800 Square Feet?

How much gravel for 800 square feet depends on depth. At 4 inches you need about 9.88 cubic yards, roughly 13.8 tons at 1.4 tons per yard. Each inch of depth over 800 square feet adds about 2.47 yards.

Volume and tonnage calculator →

Gravel for 800 sq ft by depth

Depth	Cubic yards	Tons	Tons +10%
2 in	4.94	6.9	7.6
3 in	7.41	10.4	11.4
4 in	9.88	13.8	15.2
6 in	14.81	20.7	22.8

Working it out

800 sq ft × (4 ÷ 12) ft = 266.7 cubic feet.
÷ 27 = 9.88 cubic yards.
× 1.4 tons per yard = 13.8 tons.

About gravel

Because ’gravel’ covers so many products, the weight per yard moves with stone size and how much fine material is in the pile. Rounded stone with no fines rolls under tires; crushed stone with fines locks together. Typical weight: 1.3 to 1.5 tons per cubic yard.

Getting the order right

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.

Good and poor uses for gravel

Good uses:

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 15x30 area at 3 inches takes about 5.8 tons.
Weight used here: about 1.4 tons per cubic yard.

Mistakes that throw off the order

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.
Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.

Questions people ask

How many tons of gravel for 800 square feet?

About 13.8 tons at 4 inches deep.

How many cubic yards of gravel for 800 square feet?

About 9.88 yards at 4 inches.

How much gravel for 800 square feet at 2 inches?

About 6.9 tons, or 4.94 cubic yards.

How much does a yard of gravel weigh?

About 1.3 to 1.5 tons.

Should I add extra?

Yes, about 10 percent is a common allowance.

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