📏 Imperial gallons to US fluid ounces Converter
Convert imperial gallons (imp gal) to us fluid ounces (fl oz) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 imperial gallon (imp gal) = 153.72159 us fluid ounces (fl oz). Formula: fl oz = imp gal × 153.72159.
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Imperial gallons to US fluid ounces Converter inputs
Result
1 imp gal =
153.72159 fl oz
fl oz = imp gal × 153.72159
1 imperial gallon = 153.72159 fl oz · fl oz to imp gal
Imperial gallons to US fluid ounces conversion table
| Imperial gallons (imp gal) | US fluid ounces (fl oz) |
|---|---|
| 0.1 imp gal | 15.372159 fl oz |
| 0.5 imp gal | 76.860795 fl oz |
| 1 imp gal | 153.72159 fl oz |
| 2 imp gal | 307.44318 fl oz |
| 3 imp gal | 461.16477 fl oz |
| 5 imp gal | 768.60795 fl oz |
| 10 imp gal | 1,537.2159 fl oz |
| 20 imp gal | 3,074.4318 fl oz |
| 25 imp gal | 3,843.0398 fl oz |
| 50 imp gal | 7,686.0795 fl oz |
| 100 imp gal | 15,372.159 fl oz |
| 1,000 imp gal | 153,721.59 fl oz |
Other volume conversions
imp gal to mLimp gal to Limp gal to m³imp gal to tspimp gal to tbspimp gal to fl ozimp gal to cupimp gal to ptimp gal to qtimp gal to gal
How to convert imperial gallons to us fluid ounces
Multiply the number of imperial gallons by 153.72159 to get us fluid ounces: fl oz = imp gal × 153.72159.
Example: 5 imp gal = 768.60795 fl oz.
The imperial gallon (imp gal) and the us fluid ounce (fl oz) are both units of volume. Need the opposite direction? Use the fl oz to imp gal converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many us fluid ounces are in a imperial gallon?
1 imperial gallon = 153.72159 us fluid ounces.
How do I convert imperial gallons to us fluid ounces?
Use the formula fl oz = imp gal × 153.72159. For example, 5 imp gal = 768.60795 fl oz.
How do I convert us fluid ounces back to imperial gallons?
1 us fluid ounce = 0.0065052671 imperial gallons. Use the fl oz to imp gal converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.