For 1 foot deep, 400 cu ft. For 3 inches deep, 100 cu ft.
2.37 cubic yards of stone for every 3 inches deep it needs to be
3000 sq ft * 4 inches = 1000 cubic feet.
Plan on about 2.2 cubic yards (2.8 tons) of gravel.
630 cubic inches
For 1 foot deep, 400 cu ft. For 3 inches deep, 100 cu ft.
You will need 1500 cubic feet.
To give you an answer, we need to know how wide, how long and how deep. You gave us 2 of the 3 numbers we need. No answer for you.
Plan on about 2.2 cubic yards (2.8 tons) of gravel.
3000 sq ft * 4 inches = 1000 cubic feet.
2.37 cubic yards of stone for every 3 inches deep it needs to be
Usually a cubic yard will cover 15 square yards at 3 inches deep so I would reckon on 22 cubic yards. Hold on that I've got that wrong it's 2 cubic yards .Sorry.
630 cubic inches
54sqare feet
2 inches = 1/6 foot Volume = 3,500/6 = 5831/3 cubic feet = 21.605 cubic yards
An area 10 foot x 10 foot is 100 square feet. 100 cubic feet of sand would cover it with a one foot deep layer of sand. If the sand needs to be 6 inches deep, then 50 cubic feet are be needed, or 25 cubic feet if the sand is to be 3 inches thick.
100' x 200' x 1/3' = 6666.66... recurring cubic feet.