Pool Volume Calculator
Calculate swimming pool volume in gallons and liters by pool shape.
Enter dimensions for rectangular, round, or oval pools.
Enter pool dimensions in feet — see volume in gallons and liters.
Pool Volume
Pool volume formulas by shape.
Rectangular pool:
- Volume = Length x Width x Average Depth x 7.48 (for US gallons)
- Volume = Length x Width x Average Depth (for cubic feet)
Round pool:
- Volume = Radius2 x Pi x Average Depth x 7.48
Oval pool:
- Volume = (Long Radius x Short Radius) x Pi x Average Depth x 7.48
Average depth = (Shallow End + Deep End) / 2
Conversion factors:
- 1 cubic foot = 7.48 US gallons = 28.317 liters
- 1 US gallon = 3.785 liters
Typical pool volumes:
- Small above-ground (12 ft round, 4 ft deep): 3,400 gallons (12,870 L)
- Medium in-ground (16x32 ft, 5 ft avg): 19,200 gallons (72,700 L)
- Large in-ground (20x40 ft, 6 ft avg): 35,900 gallons (135,900 L)
- Olympic pool (50x25 m, 2 m deep): 660,000 gallons (2,500,000 L)