There are 128 ounces in a gallon.

**1 US gallon = 128 US fluid ounces**

**1 UK gallon = 160 UK ounces**

The gallon is a non-metric liquid measurement unit accepted in many countries. The US liquid gallon (about 3.785 liters) and the imperial gallon (about 4.54 liters) are the most common definitions of this unit. The US gallon consists of 128 US fluid ounces, and the imperial gallon consists of 160 imperial fluid ounces. The Ounce (abbr. oz) is a widely-spread non-metric unit of mass or volume (fluid ounce), which is used in various systems and has several definitions. The US fluid ounce equals to about 29.6 milliliters, and the imperial fluid ounce equals to about 28.4 milliliters.

## Gallons To Ounces Chart

Gallon |
Ounce |
---|---|

1 Gallon = | 128 Ounce |

2 Gallon = | 256 Ounce |

3 Gallon = | 384 Ounce |

4 Gallon = | 512 Ounce |

5 Gallon = | 640 Ounce |

6 Gallon = | 768 Ounce |

7 Gallon = | 896 Ounce |

8 Gallon = | 1024 Ounce |

9 Gallon = | 1152 Ounce |

10 Gallon = | 1280 Ounce |

11 Gallon = | 1408 Ounce |

12 Gallon = | 1536 Ounce |

13 Gallon = | 1664 Ounce |

14 Gallon = | 1792 Ounce |

15 Gallon = | 1920 Ounce |

16 Gallon = | 2048 Ounce |

17 Gallon = | 2176 Ounce |

18 Gallon = | 2304 Ounce |

19 Gallon = | 2432 Ounce |

20 Gallon = | 2560 Ounce |