---
title: "Imperial gallons to US fluid ounces converter"
description: "1 imperial gallon = 153.7216 US fluid ounces. Conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/imperial-gallons-to-fl-oz/
site: "At One Place"
---

# Imperial gallons to US fluid ounces

**1 imperial gallon in US fluid ounces: 1 imp gal = 153.7216 fl oz**

fl oz = imp gal × 153.7215905

To convert imperial gallons to US fluid ounces, multiply by 153.7215905. The table below gives the values people look up most often, and the converter works for any number.

## Imperial gallons to US fluid ounces table

*Common imperial gallon values converted to US fluid ounces.*

| Imperial gallons | US fluid ounces |
| --- | --- |
| 1 imp gal | 153.7216 |
| 2 imp gal | 307.4432 |
| 3 imp gal | 461.1648 |
| 4 imp gal | 614.8864 |
| 5 imp gal | 768.608 |
| 10 imp gal | 1,537.2159 |
| 15 imp gal | 2,305.8239 |
| 20 imp gal | 3,074.4318 |
| 25 imp gal | 3,843.0398 |
| 30 imp gal | 4,611.6477 |
| 40 imp gal | 6,148.8636 |
| 50 imp gal | 7,686.0795 |
| 75 imp gal | 11,529.119 |
| 100 imp gal | 15,372.159 |
| 250 imp gal | 38,430.398 |
| 500 imp gal | 76,860.795 |
| 1,000 imp gal | 153,721.59 |

## How the conversion works

The relationship is fl oz = imp gal × 153.7215905. Both units measure volume, so the conversion is a fixed factor that never changes.

> Imperial gallon: UK gallon.

## Common questions

### How many US fluid ounces are in one imperial gallon?

One imperial gallon equals 153.7216 US fluid ounces. fl oz = imp gal × 153.7215905.

### How do you convert imperial gallons to US fluid ounces?

Use fl oz = imp gal × 153.7215905. So 10 imp gal is 1,537.2159 fl oz.

### How many imperial gallons are in one US fluid ounce?

One US fluid ounce equals 0.0065053 imperial gallons, which is the reverse of the conversion above.

### Is there more than one kind of imperial gallon?

UK gallon.

## Related pages

- [US fluid ounces to Imperial gallons](https://atoneplace.net/convert/fl-oz-to-imperial-gallons/)
- [Imperial gallons to Liters](https://atoneplace.net/convert/imperial-gallons-to-liters/)
- [Imperial gallons to Milliliters](https://atoneplace.net/convert/imperial-gallons-to-ml/)
- [Imperial gallons to Cubic meters](https://atoneplace.net/convert/imperial-gallons-to-cubic-meters/)
- [Imperial gallons to US gallons](https://atoneplace.net/convert/imperial-gallons-to-gallons/)
- [Imperial gallons to US quarts](https://atoneplace.net/convert/imperial-gallons-to-quarts/)
- [Imperial gallons to US pints](https://atoneplace.net/convert/imperial-gallons-to-pints/)
- [Imperial gallons to US cups](https://atoneplace.net/convert/imperial-gallons-to-cups/)
- [Imperial gallons to Tablespoons](https://atoneplace.net/convert/imperial-gallons-to-tablespoons/)
- [Imperial gallons to Teaspoons](https://atoneplace.net/convert/imperial-gallons-to-teaspoons/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)