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UK Gallons to UK Fluid Ounces (imp gal to imp fl oz) Converter

1 UK gallon (imp gal) = 160 UK fluid ounces (imp fl oz). To convert UK gallons to UK fluid ounces, multiply by 160: 25 imp gal × 160 = 4,000 imp fl oz.

1 imp gal = 160 imp fl oz
Convert the other way: UK Fluid Ounces to UK Gallons

Quick facts

How to convert UK gallons to UK fluid ounces

  1. Take the value in UK gallons.
  2. Multiply it by 160 (the number of UK fluid ounces in one UK gallon).
  3. Round the result to the precision you need.
imp fl oz = imp gal × 160

Worked example: 25 imp gal × 160 = 4000 imp fl oz.

To convert UK fluid ounces back to UK gallons, multiply by 0.00625, or divide by 160.

Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).

UK Gallons to UK Fluid Ounces conversion table

UK Gallons to UK Fluid Ounces conversion table
UK Gallons [imp gal]UK Fluid Ounces [imp fl oz]
0.01 imp gal1.6 imp fl oz
0.1 imp gal16 imp fl oz
1 imp gal160 imp fl oz
2 imp gal320 imp fl oz
3 imp gal480 imp fl oz
5 imp gal800 imp fl oz
10 imp gal1600 imp fl oz
20 imp gal3200 imp fl oz
50 imp gal8000 imp fl oz
100 imp gal16000 imp fl oz
1000 imp gal160000 imp fl oz

imp gal to imp fl oz chart from 1 to 100

UK Fluid Ounces to UK Gallons conversion table

UK Fluid Ounces to UK Gallons conversion table
UK Fluid Ounces [imp fl oz]UK Gallons [imp gal]
0.01 imp fl oz0.0000625 imp gal
0.1 imp fl oz0.000625 imp gal
1 imp fl oz0.00625 imp gal
2 imp fl oz0.0125 imp gal
3 imp fl oz0.01875 imp gal
5 imp fl oz0.03125 imp gal
10 imp fl oz0.0625 imp gal
20 imp fl oz0.125 imp gal
50 imp fl oz0.3125 imp gal
100 imp fl oz0.625 imp gal
1000 imp fl oz6.25 imp gal

UK Gallons vs UK Fluid Ounces

UK GallonUK Fluid Ounce
Symbolimp galimp fl oz
Equals1 imp gal = 160 imp fl oz1 imp fl oz = 0.00625 imp gal

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.

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.

Frequently asked questions

How many UK fluid ounces are in a UK gallon?

There are 160 UK fluid ounces in 1 UK gallon (1 imp gal = 160 imp fl oz).

How many UK gallons are in a UK fluid ounce?

There are 0.00625 UK gallons in 1 UK fluid ounce (1 imp fl oz = 0.00625 imp gal).

How do I convert UK gallons to UK fluid ounces?

Multiply the number of UK gallons by 160. For example, 10 imp gal × 160 = 1,600 imp fl oz. To convert back, multiply by 0.00625.

What is 10 imp gal in UK fluid ounces?

10 imp gal = 1,600 imp fl oz.

What is 100 imp gal in UK fluid ounces?

100 imp gal = 16,000 imp fl oz.

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.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026