# How do you figure gallons in a pool?

1 min read

##### Asked by: Katie Zayas

Length times width gives the surface area of the pool. Multiplying that by the depth gives the volume in cubic feet. Since there are 7.5 gallons in each cubic foot, **multiply the cubic feet of the pool by 7.5** to arrive at the volume of the pool, expressed in gallons.

## How many gallons is a 12×12 pool?

2,975 gals

Above Ground Swimming Pool Water Volumes by Size | ||
---|---|---|

12 ft Round | 2,975 gals |
3,398 gals |

15 ft Round | 4,646 gals | 5,310 gals |

18 ft Round | 7,646 gals | 8,602 gals |

21 ft Round | 9,106 gals | 10,408 gals |

## How many gallons is my pool chart?

How Many Gallons Of Water Are In My Swimming Pool?

POOL SIZE | 4′ AVG. DEPTH | 5′ AVG. DEPTH |
---|---|---|

15′ X 30′ | 13,500 | 19,900 |

16′ X 32′ | 15,400 | 19,200 |

18′ X 36′ | 19,400 | 24,300 |

20′ X 40′ | 24,000 | 30,000 |

## How many gallons is a 15ft 4ft pool?

Calculations. Multiply the diameter by the diameter by the depth by the water by the number 5.9 to determine the volume. For a 15-foot round pool that is 4 feet deep, the fomula would look like this: 15 x 15 x 4 x 5.9 = **5,310 gallons** of water.

## How many gallons is a 18ft 4ft pool?

For example, for an 18 ft. pool 4 ft. high you would multiply 18 x 18 = **324**. Then 324 x 4 = 1,296.

## How many gallons is a 15 foot by 42 inch pool?

3,861 gallons

Water capacity is **3,861 gallons** (90%) and it is ready for water in 45 minutes.