Calculating Circles
How to calculate the length around a circle
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
How to calculate the square footage inside a circle
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.
- Calculate Area
- Calculate Distance
- Calculate Depth
- Calculate Aggregate
- Calculate Driveway or Pad Coverage
Other Helpful Calculators
Store Hours:
Monday - Friday:
7 am - 6 pm
Saturday:
8 am - 3 pm

Due to the nature of our earth’s products: color, exact sizing, and special characteristics cannot be guaranteed. Please be aware of computer monitors and desktop printers when selecting colors whereas they may appear different from the actual. Please visit our Terms and Conditions page / Product quality section for further details.




