A cubic yard of gravel will cover 81 square feet at 4" of thickness. Multiply the width of the patio by the length of the patio to get your square footage. Gravel is usually sold by the cubic yard.
The amount of gravel needed to cover 252 square feet depends on how thick (that is, deep) you want the gravel. If you want the gravel to be 3 inches thick... Convert the measurement to the same units. We'll use feet. 3 inches = 1/4 foot Multiply the thickness times the area to get volume in cubic measure. 1/4 feet x 252 feet = 63 cubic feet Gravel in the US is usually sold by the cubic yard, which is 27 cubic feet Thus, 63/27 = 2 1/3 cubic yards 2 1/3 cubic yards of gravel will cover 252 square feet of area to a dept of 3 inches.
It depends how thick the gravel is being laid - at 4 inches thick, a cubic yard will cover 81 square feet.
A 50lb bag of Pea gravel will cover about half a cubic foot.
9.26 cubic yards for every inch of depth.
92.593 cubic yards for every inch deep.
Ten cubic feet will do the job!
1 cubic yard equals 27 cubic feet. At a six inch depth 1 cubic foot will cover 2 square feet, so 27 cubic feet will cover 54 square feet.
Plan on about 2.2 cubic yards (2.8 tons) of gravel.
You'll need about 28.704 cubic yards (37 tons) of gravel.