How many gals does a 15X15X4 pool hold?

To calculate the volume of a rectangular pool, use the formula: Volume = length × width × depth. For a 15x15x4 pool, the volume is 15 × 15 × 4 = 900 cubic feet. Since there are 7.48 gallons in a cubic foot, the pool holds approximately 6,737 gallons (900 × 7.48).