Pool Volume Formulas
Use these formulas to manually calculate your pool volume:
| Pool Shape | Formula |
|---|---|
| Rectangle | Length × Width × Avg Depth × 7.48 |
| Circle | Diameter × Diameter × Avg Depth × 5.9 |
| Oval | Length × Width × Avg Depth × 5.9 |
| Kidney | Length × Avg Width × Avg Depth × 7.48 × 0.85 |
Note: Results are in gallons. One cubic foot = 7.48 gallons.
Common Pool Sizes
Inground Pools
| Size (ft) | Avg Depth | Gallons |
|---|---|---|
| 12 × 24 | 5 ft | 10,800 |
| 15 × 30 | 5.5 ft | 18,500 |
| 16 × 32 | 5.5 ft | 21,000 |
| 18 × 36 | 6 ft | 29,000 |
| 20 × 40 | 6 ft | 36,000 |
Above Ground Pools
| Size | Depth | Gallons |
|---|---|---|
| 15 ft round | 48 in | 4,978 |
| 18 ft round | 52 in | 7,646 |
| 24 ft round | 52 in | 13,594 |
| 12 × 24 oval | 52 in | 6,797 |
| 15 × 30 oval | 52 in | 10,620 |
Why Pool Volume Matters
- Chemical dosing - All pool chemicals are dosed based on gallons
- Equipment sizing - Pumps, filters, and heaters need to match your pool size
- Fill time - Know how long it takes to fill or top off your pool
- Water costs - Estimate your water bill for filling