US Fluid Ounces to UK Gallons (fl oz to imp gal) Converter
1 US fluid ounce (fl oz) = 0.00650527 UK gallons (imp gal). To convert US fluid ounces to UK gallons, multiply by 0.00650527: 12 fl oz × 0.00650527 = 0.0780632 imp gal.
Quick facts
- 1 fl oz = 0.00650527 imp gal
- 1 imp gal = 153.722 fl oz
- Formula: imp gal = fl oz × 0.00650527
- Quick estimate: multiply by about 0.0065
How to convert US fluid ounces to UK gallons
- Start with your measurement in US fluid ounces.
- Multiply it by 0.00650527 (the number of UK gallons in one US fluid ounce).
- Check the answer: it should be smaller than the number you started with.
Worked example (a can of soda): 12 fl oz × 0.00650527 = 0.0780632 imp gal.
To convert UK gallons back to US fluid ounces, multiply by 153.722, or divide by 0.00650527.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
US Fluid Ounces to UK Gallons conversion table
| US Fluid Ounces [fl oz] | UK Gallons [imp gal] |
|---|---|
| 0.01 fl oz | 0.0000650527 imp gal |
| 0.1 fl oz | 0.0006505267 imp gal |
| 1 fl oz | 0.0065052671 imp gal |
| 2 fl oz | 0.0130105342 imp gal |
| 3 fl oz | 0.0195158012 imp gal |
| 5 fl oz | 0.0325263354 imp gal |
| 10 fl oz | 0.0650526708 imp gal |
| 20 fl oz | 0.1301053415 imp gal |
| 50 fl oz | 0.3252633538 imp gal |
| 100 fl oz | 0.6505267076 imp gal |
| 1000 fl oz | 6.5052670757 imp gal |
fl oz to imp gal chart from 1 to 100
- 1 fl oz 0.00650527 imp gal
- 2 fl oz 0.0130105 imp gal
- 3 fl oz 0.0195158 imp gal
- 4 fl oz 0.0260211 imp gal
- 5 fl oz 0.0325263 imp gal
- 6 fl oz 0.0390316 imp gal
- 7 fl oz 0.0455369 imp gal
- 8 fl oz 0.0520421 imp gal
- 9 fl oz 0.0585474 imp gal
- 10 fl oz 0.0650527 imp gal
- 11 fl oz 0.0715579 imp gal
- 12 fl oz 0.0780632 imp gal
- 13 fl oz 0.0845685 imp gal
- 14 fl oz 0.0910737 imp gal
- 15 fl oz 0.097579 imp gal
- 16 fl oz 0.104084 imp gal
- 17 fl oz 0.11059 imp gal
- 18 fl oz 0.117095 imp gal
- 19 fl oz 0.1236 imp gal
- 20 fl oz 0.130105 imp gal
- 25 fl oz 0.162632 imp gal
- 30 fl oz 0.195158 imp gal
- 35 fl oz 0.227684 imp gal
- 40 fl oz 0.260211 imp gal
- 45 fl oz 0.292737 imp gal
- 50 fl oz 0.325263 imp gal
- 55 fl oz 0.35779 imp gal
- 60 fl oz 0.390316 imp gal
- 65 fl oz 0.422842 imp gal
- 70 fl oz 0.455369 imp gal
- 75 fl oz 0.487895 imp gal
- 80 fl oz 0.520421 imp gal
- 85 fl oz 0.552948 imp gal
- 90 fl oz 0.585474 imp gal
- 95 fl oz 0.618 imp gal
- 100 fl oz 0.650527 imp gal
UK Gallons to US Fluid Ounces conversion table
| UK Gallons [imp gal] | US Fluid Ounces [fl oz] |
|---|---|
| 0.01 imp gal | 1.5372159027 fl oz |
| 0.1 imp gal | 15.372159027 fl oz |
| 1 imp gal | 153.7215902697 fl oz |
| 2 imp gal | 307.4431805394 fl oz |
| 3 imp gal | 461.1647708091 fl oz |
| 5 imp gal | 768.6079513485 fl oz |
| 10 imp gal | 1537.215902697 fl oz |
| 20 imp gal | 3074.431805394 fl oz |
| 50 imp gal | 7686.0795134849 fl oz |
| 100 imp gal | 15372.1590269698 fl oz |
| 1000 imp gal | 153721.5902696985 fl oz |
US Fluid Ounces vs UK Gallons
| US Fluid Ounce | UK Gallon | |
|---|---|---|
| Symbol | fl oz | imp gal |
| Equals | 1 fl oz = 0.00650527 imp gal | 1 imp gal = 153.722 fl oz |
What is a US fluid ounce?
A US customary unit equal to 1/16 of a US pint. Used in the US for beverage and bottle sizes.
What is a UK gallon?
The imperial gallon, defined as exactly 4.54609 litres (UK Weights and Measures Act 1985); about 20% larger than the US gallon. Used in the UK and Canada for fuel economy (miles per gallon), garden and aquarium volumes, and older fuel prices.
When You Need to Convert US Fluid Ounces to UK Gallons
US fluid ounces are used mainly in the United States, while UK gallons are used mainly in the UK (pub pints, fuel economy in mpg) and older Canadian recipes. This conversion bridges the US customary and metric systems, so it comes up whenever a figure crosses the US border with Canada or the Atlantic with the UK: product specifications, travel, recipes, school work and trade.
How big is 1 fl oz compared with 1 imp gal?
1 fl oz is only 0.00650527 of 1 imp gal: you need 153.722 US fluid ounces to make 1 imp gal, so the number gets smaller when you convert.
US Fluid Ounces to UK Gallons without a calculator
- In your head: multiply by 0.007 (about 7.6% off). 16 fl oz × 0.007 ≈ 0.112 imp gal.
- Closer estimate: multiply by 0.0065 (within 0.081%).
- Or divide: divide by 150 (within 2.4%), which is often easier than multiplying by a small decimal.
Real-world fl oz to imp gal examples
| Example | US Fluid Ounces | UK Gallons |
|---|---|---|
| A can of soda | 12 fl oz | 0.0780632 imp gal |
| A US pint glass | 16 fl oz | 0.104084 imp gal |
| One cup | 8 fl oz | 0.0520421 imp gal |
| A shot (jigger) | 1.5 fl oz | 0.0097579 imp gal |
| One imperial gallon | 153.722 fl oz | 1 imp gal |
| A small aquarium | 1537.22 fl oz | 10 imp gal |
| A garden water butt | 6917.47 fl oz | 45 imp gal |
How exact is the fl oz to imp gal factor?
The factor is exact by definition, so any error comes only from rounding. Keep at least 4 significant figures for school work, and the full factor for anything legal or commercial.
Mistakes to avoid
- US and imperial (UK) measures share names but not sizes. Check which one a recipe, label or fuel figure uses before converting.
Background on US fluid ounces and UK gallons
The imperial gallon was introduced in 1824 and is defined as exactly 4.54609 litres.
What people convert next
Related conversions you may need next: uk fluid ounces to uk gallons, us fluid ounces to us gallons, uk gallons to liters and uk gallons to us gallons. The full volume converter lists every unit.
On pakmath.com, the percentage calculator is a useful next step; Adzita offers a free gas mileage calculator.
Frequently asked questions
How many UK gallons are in a US fluid ounce?
There are 0.00650527 UK gallons in 1 US fluid ounce (1 fl oz = 0.0065052671 imp gal).
How many US fluid ounces are in a UK gallon?
There are 153.722 US fluid ounces in 1 UK gallon (1 imp gal = 153.7215902697 fl oz).
How do I convert US fluid ounces to UK gallons?
Multiply the number of US fluid ounces by 0.00650527. For example, 10 fl oz × 0.00650527 = 0.0650527 imp gal. To convert back, multiply by 153.722.
What is 10 fl oz in UK gallons?
10 fl oz = 0.0650527 imp gal.
What is 100 fl oz in UK gallons?
100 fl oz = 0.650527 imp gal.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.
What is an easy way to convert US fluid ounces to UK gallons?
In your head: multiply by 0.007 (about 7.6% off). 16 fl oz × 0.007 ≈ 0.112 imp gal.
How many UK gallons is 1.5 fl oz (a shot (jigger))?
1.5 fl oz = 0.0097579 imp gal.
How many US fluid ounces is one imperial gallon (1 imp gal)?
1 imp gal = 153.722 fl oz.
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