To determine how much crushed stone is needed for 280 square feet, you'll first need to decide on the depth of the stone layer. For example, if you plan to use a depth of 2 inches, you'll need about 1.56 cubic yards of crushed stone. You can calculate this by multiplying the area (280 sqft) by the depth (2/12 feet) and converting cubic feet to cubic yards (divide by 27). Adjust the depth accordingly to find the volume needed for different depths.
9000 sqft
15 x 15 = 225 sqft, each paver is 1 sqft so 225.
13,760 sqft = 1,278.34m2
144 sqft is 13.378 sqm
1.80$ per sqft
600 sqft/ton so 2 1/2 ton
$9.75/sqft
750,000 gal.
Volume = 900 sqft * 1/12 ft = 75 cubic feet.
80.0 Sqft
7.48 gallons in 1 sqft sooo... .13 sqft in a gallon of water but i dont see how this is useful.
There is not enough info here to provide an answer. Would need the ambient room conditions along with an accurate load calculation for the room.