20 × 20 ft area: the short answer
Covered 3 inches deep with crushed stone, a 20 × 20 ft area needs about 5.00 tons of gravel — about 3.70 cubic yards (100 cubic feet).
Area size
Gravel for a 20 × 20 ft area
A 20 × 20 ft area covered 3 inches deep with crushed stone needs about 5.00 tons of gravel — that's 3.70 cubic yards, or 100 cubic feet. Change the depth and stone type below.
Gravel needed
—Enter area and depth to estimate gravel.
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Shopping list
Run the calculator to prepare a list.
Estimate only.
Gravel is sold by the (short) ton or cubic yard. Weights use approximate densities that vary
with stone size, moisture, and compaction — order about 5–10% extra for spreading and
settling, and confirm tonnage with your supplier.
Adjust for your job
Lighter stone like pea gravel weighs a little less per yard; a driveway base goes deeper than a path. Change depth and stone type in the calculator, and order 5–10% extra for spreading.
Approximate crushed-stone density at 3″; 1 ton = 2,000 lb. Estimates only.
What a 20 × 20 ft area is usually used for
A 20 × 20 ft square is a common footprint for a parking pad, a turning area, a shed yard, or a generous patio. Because the area is wide, small depth errors multiply into large tonnage differences, so measuring the actual footprint and choosing one consistent depth is the most useful planning step.
How to decide
Square pads often serve mixed use: part parking, part storage, part walking. Decide the controlling use first, because vehicle areas need a compacted angular base and a thicker top layer than a patio or yard area. The calculator uses a 3-inch surface reference; enter your planned depth to see how quickly tonnage changes.
Checks before you order
- Measure the true dimensions, including any irregular edges, before trusting the total.
- Choose the depth from the controlling use rather than splitting the difference.
- Price both bags and bulk delivery; at this size bulk is usually cheaper per ton.
FAQ
How much gravel for a 20 × 20 ft area?
At 3 inches of crushed stone, a 20 × 20 ft area needs about 5.00 tons (3.70 cubic yards, 100 cubic feet). A 4-inch driveway base needs about a third more — set your depth in the calculator.
How many cubic yards of gravel for a 20 × 20 ft area?
About 3.70 cubic yards at 3 inches deep. Suppliers sell by the ton or the cubic yard, so the calculator shows both — order about 5–10% extra for spreading and settling.
Sources & verification
Source links and page assumptions reviewed .
- QUIKRETE: All-Purpose Gravel product data — Manufacturer product data for washed, graded gravel used in landscaping and drainage.
Estimate only, based on approximate crushed-stone density at 3″ depth. Weights vary with stone size, moisture, and compaction. Confirm tonnage with your supplier before delivery.