Swimming Pool Dimensions & Volumes
Outdoor Living · 8 specs
Direct Answer
Swimming pool dimensions and water volumes are standardized by World Aquatics (formerly FINA) and residential building codes into Olympic Long Course (50.0 × 25.0 × 2.0 m / 2.5 million liters / 660,000 gallons), Short Course (25.0 m / 25.0 yards), and standard residential rectangular sizes (12×24 ft to 20×40 ft).
Source: World Aquatics Facility Rules (FR 2) / ISPSC (International Swimming Pool and Spa Code) / USA Swimming · Last reviewed Aug 28, 2026
Specs
| Governing Standards | World Aquatics (FINA) Facility Rules FR 2 / ISPSC / USA Swimming Rules |
| Olympic Long Course (50m) | Length: 50.00 m (164.04 ft) | Width: 25.00 m (82.02 ft) | Depth: 2.00 to 3.00 m | 10 Lanes (2.5 m width each) |
| Olympic Pool Water Volume | Exact: 2,500,000 Liters (2,500 m³) = ~660,430 US Gallons (5.51 million lbs of water) |
| Short Course Metric (25m) | 25.00 m × 21.00 m (or 25.00 m) | Depth: 2.0 m minimum | ~1,050,000 Liters (277,000 Gallons) |
| Short Course Yards (25yd / SCY) | 75.00 ft (22.86 m) × 60.00 ft | Standard US high school and NCAA collegiate competition pool |
| Residential Small (12 × 24 ft) | Average depth 4.5 ft | ~9,700 to 10,800 US Gallons (~36,700–40,800 Liters) |
| Residential Medium (16 × 32 ft) | Average depth 5.0 ft | ~19,200 to 21,500 US Gallons (~72,700–81,400 Liters) |
| Residential Large (20 × 40 ft) | Average depth 5.5 ft | ~33,000 to 36,000 US Gallons (~125,000–136,000 Liters) |
Standard Swimming Pool Dimension & Water Volume Matrix
| Pool Classification | Dimensions (Length × Width) | Dimensions (Metric) | Average Depth | Water Volume (US Gallons) | Water Volume (Liters / Metric) |
|---|---|---|---|---|---|
| Olympic Long Course | 164.04 ft × 82.02 ft | 50.00 m × 25.00 m | 2.00 m to 3.00 m | ~660,430 Gallons | 2,500,000 Liters (2,500 m³) |
| Short Course Metric (25m) | 82.02 ft × 68.90 ft | 25.00 m × 21.00 m | 2.00 m | ~277,000 Gallons | 1,050,000 Liters |
| NCAA Short Course (25yd) | 75.00 ft × 60.00 ft | 22.86 m × 18.29 m | 6.0 ft to 12.0 ft | ~240,000 Gallons | ~908,000 Liters |
| Residential Small | 12.0 ft × 24.0 ft | 3.66 m × 7.32 m | 4.5 ft (1.37 m) | ~9,700 Gallons | 36,700 Liters |
| Residential Medium | 16.0 ft × 32.0 ft | 4.88 m × 9.75 m | 5.0 ft (1.52 m) | ~19,200 Gallons | 72,700 Liters |
| Residential Large | 20.0 ft × 40.0 ft | 6.10 m × 12.19 m | 5.5 ft (1.68 m) | ~33,000 Gallons | 125,000 Liters |
| Residential Lap Pool | 10.0 ft × 50.0 ft | 3.05 m × 15.24 m | 4.5 ft (1.37 m) | ~16,800 Gallons | 63,600 Liters |
The Mathematical Water Volume Calculation Formulas
To accurately dose chlorine, salt, and pH chemicals, pool volume must be calculated using exact geometric formulas:
-
Rectangular Pools:
Gallons = Length (ft) × Width (ft) × Avg Depth (ft) × 7.48 -
Circular / Round Pools:
Gallons = 3.1416 × (Radius in ft)² × Avg Depth (ft) × 7.48 -
Metric Conversion: Multiply cubic meters by 1,000 to obtain volume in liters (1 m³ = 1,000 L). One US gallon of pool water weighs exactly 8.34 lbs (3.78 kg).