Well, I depends on how deep you want the layer of gravel to be. But, if you just want a enough gavel to cover the space I would say about 15 to 20 bags of it. Trust me, I have done the exact same thing you are about to do.
(you can get the gravel bags from Lowe's for super cheap)
10x10xhow deep you want it in fractions of a foot = cubic feet needed. Divide total cubic feet by 27 and you have cubic yards. 1.5`` deep = .125, 3`` deep =.250 4``deep = .333 and 6`` deep = .5
Most coin size or smaller gravel runs about $20-25 a yard (ton). That will usually cover about 100 sq. feet at 3 inches deep.
13 1/4
744 Square Feet
32
That depends on how deep you want to spread it. To cover 600 square feet, you need (111/9) cubic yards for every 6 inches of depth.
That depends on the depth of gravel. I am going to assume 3 inches of gravel. One 'yard' really means a cubic yard in this context, which is volume. V = Area of base x depth 7 = (A/9)(3/36) ---- A = 7(12)(9) = 756 sq ft
1
62/3 cubic yards for every 1-foot deep. 5 cubic yards for every 9-inches deep. 31/3 cubic yards for every 6-inches deep. 5/9 cubic yard for every 1-inch deep.
26
You will need at least 32 square yards of carpet to cover that area.
5.16 yd^3 (when they say a "yard" of gravel, they mean a cubic yard).
13.333 square yards.
You will need a minimum of 38.6 square yards of carpet to cover that area.