Formula: Diameter x 3.1416 = Linear Feet Around a Circle
Example: Length Around an 18 foot diameter round Swimming Pool
18 ft x 3.1416 = 56.55 ft (total linear feet around pool)
To add 2 feet of stone (3 inches deep) around this pool: 56.55 feet x 2 feet= 113.10 feet
113.10 feet x 0.25 (3 inch depth) = 28.28 Cubic Feet
28.28 / 27 = 1.05 Cubic Yards
Formula: Length x Width x 0.7854 = Square Feet
Example: Square footage inside a 24 foot diameter round Swimming Pool
24 feet x 24 feet = 576 feet
576 feet x 0.7854 = 452.39 Square Feet (total inside pool)
To add 4 inches of sand evenly across pool:
452.39 feet x .33 (4 inches depth) = 149.29 Cubic Feet
149.29 / 27 = 5.53 Cubic Yards
To be safe, always round up. You would order 6 Cubic Yards of sand.
Example: Standard Driveway or Pad to be covered with Stone, 6 inches deep.
15 feet x 25 feet = 375 Square Feet
375 feet x 0.50 (6 inch depth) = 187.5 Cubic Feet
187.5 / 27 = 6.94 Cubic Yards (round up to 7 yards)
Example: L-Shaped Driveway or Pad to be covered with stone, 7 inches deep. The calculation is done in two sections.
18 feet x 40 feet = 720 Square Feet
10 feet x 40 feet = 400 Square Feet
400 feet + 720 feet = 1,120 Square Feet
1,120 x .58 (7 inch Depth) = 649.60 Cubic Feet
649.60 / 27 = 24.06 Cubic Yards
Length x Width = Square Feet
Square Feet x Depth = Cubic Feet
Cubic Feet / 27 = Cubic Yards
Note: When figuring quantities, remember to:
These calculators are provided for estimating purposes only.
For exact calculations, please contact The Stone Store at 888-766-4242
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