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UK Gallons to Liters (imp gal to L) Converter

1 UK gallon (imp gal) = 4.54609 liters (L). To convert UK gallons to liters, multiply by 4.54609: 25 imp gal × 4.54609 = 113.652 L. Also searched as imperial gallons to litres, UK gallon to litres, gallons to litres UK, UK gallons to litres.

1 imp gal = 4.54609 L
Convert the other way: Liters to UK Gallons

Quick facts

How to convert UK gallons to liters

  1. Take the value in UK gallons.
  2. Multiply it by 4.54609 (the number of liters in one UK gallon).
  3. Round the result to the precision you need.
L = imp gal × 4.54609

Worked example: 25 imp gal × 4.54609 = 113.652 L.

To convert liters back to UK gallons, multiply by 0.219969, or divide by 4.54609.

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

UK Gallons to Liters conversion table

UK Gallons to Liters conversion table
UK Gallons [imp gal]Liters [L]
0.01 imp gal0.0454609 L
0.1 imp gal0.454609 L
1 imp gal4.54609 L
2 imp gal9.09218 L
3 imp gal13.63827 L
5 imp gal22.73045 L
10 imp gal45.4609 L
20 imp gal90.9218 L
50 imp gal227.3045 L
100 imp gal454.609 L
1000 imp gal4546.09 L

imp gal to L chart from 1 to 100

Liters to UK Gallons conversion table

Liters to UK Gallons conversion table
Liters [L]UK Gallons [imp gal]
0.01 L0.0021996925 imp gal
0.1 L0.0219969248 imp gal
1 L0.2199692483 imp gal
2 L0.4399384966 imp gal
3 L0.6599077449 imp gal
5 L1.0998462415 imp gal
10 L2.199692483 imp gal
20 L4.399384966 imp gal
50 L10.998462415 imp gal
100 L21.9969248299 imp gal
1000 L219.9692482991 imp gal

UK Gallons vs Liters

UK GallonLiter
Symbolimp galL
Equals1 imp gal = 4.54609 L1 L = 0.219969 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 liter?

The common metric unit of volume, equal to one cubic decimeter. The standard volume unit worldwide for beverages and fuel outside the US.

Frequently asked questions

How many liters are in a UK gallon?

There are 4.54609 liters in 1 UK gallon (1 imp gal = 4.54609 L).

How many UK gallons are in a liter?

There are 0.219969 UK gallons in 1 liter (1 L = 0.2199692483 imp gal).

How do I convert UK gallons to liters?

Multiply the number of UK gallons by 4.54609. For example, 10 imp gal × 4.54609 = 45.4609 L. To convert back, multiply by 0.219969.

What is 10 imp gal in liters?

10 imp gal = 45.4609 L.

What is 100 imp gal in liters?

100 imp gal = 454.609 L.

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