Quantity to area
How gravel coverage is calculated
Coverage reverses the normal material estimate. Instead of starting with area, it converts the available gravel into volume and divides that volume by the finished depth.
If the quantity is supplied by weight, the calculator first divides weight by bulk density to estimate volume. That makes the density selection important when you start with tons, tonnes, or bags.
Coverage from one cubic yard
One cubic yard contains 27 cubic feet. At 2 inches deep, divide 27 by 2/12 to get 162 square feet. At 3 inches deep, the same yard covers 108 square feet. At 4 inches deep, it covers 81 square feet.
Coverage from one ton
A ton is a weight, so coverage changes with density. A light product occupies more volume per ton than a dense product. Use the supplier bulk density or select the nearest material in the calculator.
Linear path coverage
Enter a path width to turn area into length. For example, 120 square feet of coverage on a 3-foot-wide path provides about 40 linear feet.