US Gallons to UK Fluid Ounces (gal to imp fl oz) Converter
1 US gallon (gal) = 133.228 UK fluid ounces (imp fl oz). To convert US gallons to UK fluid ounces, multiply by 133.228: 15 gal × 133.228 = 1,998.42 imp fl oz.
Quick facts
- 1 gal = 133.228 imp fl oz
- 1 imp fl oz = 0.00750594 gal
- Formula: imp fl oz = gal × 133.228
- Quick estimate: multiply by about 133
How to convert US gallons to UK fluid ounces
- Take the value in US gallons.
- Multiply it by 133.228 (the number of UK fluid ounces in one US gallon).
- Round the result to the precision you need.
Worked example (a car fuel tank): 15 gal × 133.228 = 1998.42 imp fl oz.
To convert UK fluid ounces back to US gallons, multiply by 0.00750594, or divide by 133.228.
Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).
US Gallons to UK Fluid Ounces conversion table
| US Gallons [gal] | UK Fluid Ounces [imp fl oz] |
|---|---|
| 0.01 gal | 1.3322786954 imp fl oz |
| 0.1 gal | 13.3227869541 imp fl oz |
| 1 gal | 133.2278695406 imp fl oz |
| 2 gal | 266.4557390813 imp fl oz |
| 3 gal | 399.6836086219 imp fl oz |
| 5 gal | 666.1393477032 imp fl oz |
| 10 gal | 1332.2786954064 imp fl oz |
| 20 gal | 2664.5573908128 imp fl oz |
| 50 gal | 6661.3934770319 imp fl oz |
| 100 gal | 13322.7869540638 imp fl oz |
| 1000 gal | 133227.8695406382 imp fl oz |
gal to imp fl oz chart from 1 to 100
- 1 gal 133.228 imp fl oz
- 2 gal 266.456 imp fl oz
- 3 gal 399.684 imp fl oz
- 4 gal 532.911 imp fl oz
- 5 gal 666.139 imp fl oz
- 6 gal 799.367 imp fl oz
- 7 gal 932.595 imp fl oz
- 8 gal 1065.82 imp fl oz
- 9 gal 1199.05 imp fl oz
- 10 gal 1332.28 imp fl oz
- 11 gal 1465.51 imp fl oz
- 12 gal 1598.73 imp fl oz
- 13 gal 1731.96 imp fl oz
- 14 gal 1865.19 imp fl oz
- 15 gal 1998.42 imp fl oz
- 16 gal 2131.65 imp fl oz
- 17 gal 2264.87 imp fl oz
- 18 gal 2398.1 imp fl oz
- 19 gal 2531.33 imp fl oz
- 20 gal 2664.56 imp fl oz
- 25 gal 3330.7 imp fl oz
- 30 gal 3996.84 imp fl oz
- 35 gal 4662.98 imp fl oz
- 40 gal 5329.11 imp fl oz
- 45 gal 5995.25 imp fl oz
- 50 gal 6661.39 imp fl oz
- 55 gal 7327.53 imp fl oz
- 60 gal 7993.67 imp fl oz
- 65 gal 8659.81 imp fl oz
- 70 gal 9325.95 imp fl oz
- 75 gal 9992.09 imp fl oz
- 80 gal 10658.2 imp fl oz
- 85 gal 11324.4 imp fl oz
- 90 gal 11990.5 imp fl oz
- 95 gal 12656.6 imp fl oz
- 100 gal 13322.8 imp fl oz
UK Fluid Ounces to US Gallons conversion table
| UK Fluid Ounces [imp fl oz] | US Gallons [gal] |
|---|---|
| 0.01 imp fl oz | 0.0000750594 gal |
| 0.1 imp fl oz | 0.0007505937 gal |
| 1 imp fl oz | 0.007505937 gal |
| 2 imp fl oz | 0.0150118741 gal |
| 3 imp fl oz | 0.0225178111 gal |
| 5 imp fl oz | 0.0375296852 gal |
| 10 imp fl oz | 0.0750593703 gal |
| 20 imp fl oz | 0.1501187407 gal |
| 50 imp fl oz | 0.3752968517 gal |
| 100 imp fl oz | 0.7505937034 gal |
| 1000 imp fl oz | 7.5059370344 gal |
US Gallons vs UK Fluid Ounces
| US Gallon | UK Fluid Ounce | |
|---|---|---|
| Symbol | gal | imp fl oz |
| Equals | 1 gal = 133.228 imp fl oz | 1 imp fl oz = 0.00750594 gal |
What is a US gallon?
A US customary unit equal to 4 quarts. Used in the US for fuel, milk, and paint.
What is a UK fluid ounce?
A UK imperial unit equal to 1/20 of an imperial pint (exactly 28.4130625 ml). Used in the UK and Canada on older recipes, drinks measures and some bottle labels.
Who Converts US Gallons to UK Fluid Ounces?
US gallons are used mainly in the United States, while UK fluid ounces are used mainly in the UK (pub pints, fuel economy in mpg) and older Canadian recipes. Because the two units come from different systems, Americans, Britons and Canadians often need it when buying from each other online, following each other's recipes or instructions, or filling in official forms.
How big is 1 gal compared with 1 imp fl oz?
1 gal is 133.228 times the size of 1 imp fl oz, so the number gets bigger when you convert US gallons to UK fluid ounces.
US Gallons to UK Fluid Ounces without a calculator
- Closer estimate: multiply by 130 (within 2.4%).
Real-world gal to imp fl oz examples
| Example | US Gallons | UK Fluid Ounces |
|---|---|---|
| A car fuel tank | 15 gal | 1998.42 imp fl oz |
| A gallon of milk | 1 gal | 133.228 imp fl oz |
| A hot-water heater | 50 gal | 6661.39 imp fl oz |
| One imperial pint | 0.150119 gal | 20 imp fl oz |
| Half a pint | 0.0750594 gal | 10 imp fl oz |
| One imperial fluid ounce | 0.00750594 gal | 1 imp fl oz |
How exact is the gal to imp fl oz factor?
The factor is exact by definition, so any error comes only from rounding. Round the final answer, not the factor, and match the precision of the number you started with.
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 gallons and UK fluid ounces
The US gallon is the old English wine gallon of exactly 231 cubic inches.
Related conversions
Next, you might want uk gallons to uk fluid ounces, us gallons to us fluid ounces, uk fluid ounces to milliliters and uk fluid ounces to us fluid ounces. 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 fluid ounces are in a US gallon?
There are 133.228 UK fluid ounces in 1 US gallon (1 gal = 133.2278695406 imp fl oz).
How many US gallons are in a UK fluid ounce?
There are 0.00750594 US gallons in 1 UK fluid ounce (1 imp fl oz = 0.007505937 gal).
How do I convert US gallons to UK fluid ounces?
Multiply by 133.228, or divide by 0.00750594 if that is easier. Example: 10 gal = 1,332.28 imp fl oz.
What is 10 gal in UK fluid ounces?
10 gal = 1,332.28 imp fl oz.
What is 100 gal in UK fluid ounces?
100 gal = 13,322.8 imp fl oz.
Is the gal to imp fl oz 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 gallons to UK fluid ounces?
Closer estimate: multiply by 130 (within 2.4%).
How many UK fluid ounces is 1 gal (a gallon of milk)?
1 gal = 133.228 imp fl oz.
How many US gallons is one imperial fluid ounce (1 imp fl oz)?
1 imp fl oz = 0.00750594 gal.
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