Convert Imperial gallons to US fluid ounces
1 imperial gallon = 153.72 US fluid ounces · fl oz = imp gal × 153.7215905
When you need this conversion
This conversion goes from imperial gallons, the UK volume unit about 20 percent larger than a US gallon, to US fluid ounces, used for drinks and recipe liquids. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
Imperial gallons to US fluid ounces conversion table
| Imperial gallons (imp gal) | US fluid ounces (fl oz) |
|---|---|
| 1 imp gal | 153.72 fl oz |
| 2 imp gal | 307.44 fl oz |
| 3 imp gal | 461.16 fl oz |
| 5 imp gal | 768.61 fl oz |
| 10 imp gal | 1,537.22 fl oz |
| 15 imp gal | 2,305.82 fl oz |
| 20 imp gal | 3,074.43 fl oz |
| 25 imp gal | 3,843.04 fl oz |
| 50 imp gal | 7,686.08 fl oz |
| 75 imp gal | 11,529.12 fl oz |
| 100 imp gal | 15,372.16 fl oz |
| 250 imp gal | 38,430.4 fl oz |
| 500 imp gal | 76,860.8 fl oz |
| 1,000 imp gal | 153,721.59 fl oz |
The formula
fl oz = imp gal × 153.7215905Because both units measure volume, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
US fluid ounces to imperial gallons →Related volume conversions
- Milliliters to US fluid ounces
- Milliliters to US cups
- Liters to cubic meters
- Liters to US gallons
- Cubic meters to liters
- Cubic meters to cubic feet
- Cubic feet to cubic meters
- US gallons to liters
- US cups to milliliters
- US fluid ounces to milliliters
- Liters to US fluid ounces
- Cubic meters to US fluid ounces
Frequently asked questions
- How many US fluid ounces are in a imperial gallon?
- There are 153.72 US fluid ounces in 1 imperial gallon. The formula is fl oz = imp gal × 153.7215905.
- How do you convert imperial gallons to US fluid ounces?
- Use the formula fl oz = imp gal × 153.7215905. For example, 10 imperial gallons equals 1,537.22 US fluid ounces.
- Is the imperial gallons to US fluid ounces conversion exact?
- Yes. Imperial gallons and US fluid ounces are both units of volume, related by an exact defined factor. Displayed results are rounded for readability.
- What is imp gal short for?
- imp gal is the standard symbol for imperial gallon. fl oz is the symbol for US fluid ounce.