Here is a helpful tool to calculate your pool's water volume. Choose from some of the most common pool shapes and sizes to find your pool's volume.

Calculating the volume of your swimming pool in gallons is essential for proper maintenance and chemical balance. Here’s a simple guide to help you determine the number of gallons in your pool based on its most common sizes and shapes.

**Rectangular/Square Pools:**Measure the length, width, and average depth.**Circular Pools:**Measure the diameter and average depth.**Oval Pools:**Measure the longest diameter (length), the shortest diameter (width), and the average depth.**Irregular Shapes:**Break down the pool into smaller, manageable shapes, measure each section, and calculate the volume for each before adding them up.

**Rectangular/Square Pools:**Volume (cubic feet) = Length (ft) × Width (ft) × Average Depth (ft)**Circular Pools:**Volume (cubic feet) = π × (Radius (ft))² × Average Depth (ft), where Radius = Diameter / 2**Oval Pools:**Volume (cubic feet) = Length (ft) × Width (ft) × Average Depth (ft) × 0.785

**1 cubic foot of water = 7.48 gallons**- Convert the volume you calculated in cubic feet to gallons by multiplying by 7.48.

**Irregular Shapes:**Add up the volumes of individual sections.**Features:**Adjust for steps, benches, and other features by subtracting their estimated volumes from the total.

- Ensure you measure the actual water depth, not just the pool’s maximum depth, as water level may be lower due to evaporation or intentional underfilling.

**Rectangular Pool (30 ft x 15 ft x 5 ft average depth)**

- Volume (cubic feet) = 30 × 15 × 5 = 2250 cubic feet
- Volume (gallons) = 2250 × 7.48 = 16,830 gallons

**Circular Pool (24 ft diameter, 4 ft average depth)**

- Radius = 24 / 2 = 12 ft
- Volume (cubic feet) = π × 12² × 4 ≈ 1,809.56 cubic feet
- Volume (gallons) = 1,809.56 × 7.48 ≈ 13,536.75 gallons

**Oval Pool (30 ft x 15 ft x 4 ft average depth)**

- Volume (cubic feet) = 30 × 15 × 4 × 0.785 = 1,413 cubic feet
- Volume (gallons) = 1,413 × 7.48 ≈ 10,572 gallons

By following these steps, you can accurately determine the number of gallons in your swimming pool, ensuring you maintain proper chemical balance and pool health.

Here is a handy cheat sheet for common pool sizes and their pool volumes.

Here are the top-selling fiberglass pool models, their dimensions including depth, and capacities:

Brand |
Model |
Dimensions (ft) |
Gallons |
---|---|---|---|

Latham Pools | Olympia 12 | 12 x 26 x 3.5-5.5 | 10,368 |

Latham Pools | Olympia 16 | 16 x 35 x 3.5-6.5 | 20,160 |

Latham Pools | Fiji | 15 x 34 x 3.5-6 | 19,000 |

Leisure Pools | Ultimate | 16 x 40 x 3.5-6.5 | 22,000 |

San Juan Pools | Rio | 12 x 24 x 3.5-5 | 9,600 |

Barrier Reef Pools | Coral Sea | 14 x 30 x 3.5-6 | 12,600 |

Thursday Pools | Goliath | 20 x 40 x 3.5-8 | 24,000 |

Gunite pools are custom-built and can be made to any size and shape. Here are standard sizes and their capacities:

Dimensions (ft) |
Depth (ft) |
Gallons |
---|---|---|

12 x 24 | 4 | 8,640 |

14 x 28 | 4 | 11,760 |

15 x 30 | 4 | 13,500 |

16 x 32 | 4 | 15,360 |

18 x 36 | 4 | 19,440 |

20 x 40 | 4 | 24,000 |

Vinyl liner pools are also highly customizable. Here are some common sizes:

Brand |
Model |
Dimensions (ft) |
Depth (ft) |
Gallons |
---|---|---|---|---|

Pool Warehouse | Rectangle Auto Kit | 20 x 40 | 4 | 24,000 |

Blue Haven Pools | Freeform Classic | 18 x 36 | 4 | 19,440 |

Premier Pools | Roman Style | 16 x 32 | 4 | 15,360 |

Kayak Pools | Tropical | 14 x 28 | 4 | 11,760 |

Brand |
Model |
Dimensions (ft) |
Depth (ft) |
Gallons |
---|---|---|---|---|

Intex | Ultra XTR Frame | 18 x 52 | 4.33 | 6,981 |

Bestway | Power Steel | 16 x 48 | 4 | 5,021 |

Coleman | Power Steel | 22 x 52 | 4.33 | 10,668 |

Summer Waves | Elite Frame | 20 x 48 | 4 | 8,241 |

Doughboy | Desert Spring | 24 x 52 | 4.33 | 13,500 |

Understanding your pool's water volume is crucial for several reasons:

**Chemical Balance:**Proper chemical treatment depends on accurate water volume measurements to maintain a safe and clean swimming environment.**Equipment Sizing:**Filters, pumps, and heaters need to be appropriately sized to your pool's volume for efficient operation.**Cost Management:**Knowing the volume helps estimate water usage for filling and maintaining the pool, aiding in budgeting for water bills and chemical supplies.**Maintenance Scheduling:**Volume affects the frequency of maintenance tasks, such as backwashing filters or adding chemicals.

Accurate knowledge of your pool's volume ensures efficient operation and maintenance, leading to a better swimming experience and longer pool life.