Pool Square Foot
Calculator — Water Area Tool

Measure the diameter and use Area = pi x (diameter/2) squared. A 15-foot round pool has an area of 3.14159 x 7.5 x 7.5 = 176.7 square feet.

A 15-foot round pool is approximately 176.7 square feet. Calculation: pi x (15/2) squared = 3.14159 x 56.25 = 176.7 sq ft.

A 12x24 foot rectangular pool is 288 square feet. Simply multiply length by width: 12 x 24 = 288 sq ft.

Calculate the total area including the deck, then subtract the pool area. For a 15 ft round pool with a 4 ft deck around it, the deck area is: pi x 11.5 squared minus pi x 7.5 squared = 238.8 sq ft.

Standard pool covers cost $0.50-2.00 per sq ft for mesh covers and $2-5 per sq ft for solid safety covers. A 200 sq ft pool cover typically costs $100-1,000 depending on type and quality.

Measure the perimeter around the pool area, not the pool square footage. A round pool with a 4 ft deck needs fencing around the outer perimeter: pi x (pool diameter + 8) = circumference in feet of linear fencing.