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How Much Crushed Stone for a 16 Foot Circle?

How much crushed stone for a 16 foot circle: about 3.5 tons at 4 inches deep. A circle 16 feet across covers about 201.1 square feet (3.1416 × 8²).

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The math

  1. Area: 201.1 sq ft.
  2. Depth in feet: 4 ÷ 12 = 0.333 ft.
  3. Cubic yards: 201.1 × 0.333 ÷ 27 = 2.48 yd³.
  4. Tons: × about 1.4 tons per yard = 3.5 tons.

The crushed stone calculator does this for any size.

Crushed stone needed by depth

DepthCubic yardsTons of crushed stoneTons +10%
2 in1.241.71.9
3 in1.862.62.9
4 in2.483.53.8
6 in3.725.25.7

Using a circle of stone

A round gravel area is easy to lay out with a stake and string at the center. Set flexible edging along the line and lay fabric inside before the stone goes in. Do not pile stone against tree trunks; leave a gap at the base.

Ordering and delivery

If you haul it yourself, a typical half-ton pickup should carry only about half a cubic yard of stone, well under what the bed looks like it can hold. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. Round up by about 10 percent for compaction and uneven ground.

Measuring the area

Measure length and width in feet at a few points and use the largest figures, since real sites are rarely square. For odd shapes, split the area into rectangles and circles, work out each one and add them together. Depth is the number most people underestimate: drive a stake, run a level string and measure down to the dug-out surface in several spots.

Tools for the job

For anything bigger than a small path, rent a plate compactor; hand tampers cannot match it. A wheelbarrow, shovels, a hard rake and stakes with string are the rest of the kit. Wet the stone lightly before compacting so it binds.

Questions people ask

How many tons of crushed stone for a 16 ft circle?

About 3.5 tons at 4 inches deep.

How many square feet is a 16 foot circle?

About 201.1 square feet.

How many tons of crushed stone are in a cubic yard?

Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.

Do I need to compact it?

Yes for anything that carries weight. Compact in lifts of a few inches with a plate compactor.

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