Gallon (UK) to Liter Converter

Volume Converter

40 units available

Decimals:

From

To

4.54609

1 gal (UK) = 4.54609 L

Formula:

L = gal (UK) × 4.54609

With your value: 1 gal (UK) = 4.54609 L

How big is that?

Everyday references on a logarithmic scale, all expressed in gallon (uk) so you can sanity-check the result.

Milk carton (1/4.5e+3 your value)0.000220 gal (UK)

Kitchen bucket (1/4.5e+2 your value)0.00220 gal (UK)

Car fuel tank (1/91 your value)0.0110 gal (UK)

Bathtub (1/23 your value)0.0440 gal (UK)

Hot tub (1/3.0 your value)0.330 gal (UK)

Your value1.00 gal (UK)

Other Gallon (UK) to Liter conversions

2 gal (UK) to L 3 gal (UK) to L 4 gal (UK) to L 5 gal (UK) to L 6 gal (UK) to L 7 gal (UK) to L 8 gal (UK) to L

Gallon (UK) to Liter Conversion Table

Gallon (UK) (gal (UK))	Liter (L)
0.5	2.273045
1	4.54609
2	9.09218
5	22.73045
10	45.4609
15	68.19135
20	90.9218
25	113.65225
50	227.3045
100	454.609
250	1,136.5225
500	2,273.045
1000	4,546.09

Liter to Gallon (UK) Conversion Table

Liter (L)	Gallon (UK) (gal (UK))
0.5	0.109985
1	0.219969
2	0.439938
5	1.099846
10	2.199692
15	3.299539
20	4.399385
25	5.499231
50	10.998462
100	21.996925
250	54.992312
500	109.984624
1000	219.969248

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Gallon (UK) (gal (UK))

Volume

Exact conversion

The imperial gallon is exactly 4.546 09 L (Weights and Measures Act 1985).

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Liter (L)

Volume

Exact conversion

The litre is exactly 10⁻³ m³ (1 dm³) and is accepted for use with the SI.

Source: Units accepted for use with the SI, SI Brochure Table 8

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Gallon (UK) to Liter

To convert from Gallon (UK) (gal (UK)) to Liter (L), multiply the value by 4.54609.

Formula: L = gal (UK) × 4.54609

Reverse: gal (UK) = L × 0.2199692483

Step-by-Step Example

Start with your value in Gallon (UK). For example: 5 gal (UK)
Multiply by the conversion factor: 5 x 4.54609
The result is: 22.73045 L

About Gallon (UK)

The imperial gallon equals exactly 4.54609 litres, about 20% larger than the US gallon — a frequent source of fuel-economy confusion.

Common uses: UK fuel figures, brewing, older recipes.

About Liter

The liter is a metric unit of volume equal to 1,000 milliliters or 1 cubic decimeter. It is widely used for measuring liquids.

Common uses: beverages, fuel, cooking.

Frequently Asked Questions

How many Liter are in 1 Gallon (UK)?

There are exactly 4.54609 Liter in 1 Gallon (UK). This means the conversion factor from Gallon (UK) to Liter is 4.54609.

What is the formula to convert Gallon (UK) to Liter?

The formula to convert Gallon (UK) to Liter is: L = gal (UK) × 4.54609. For example, to convert 10 Gallon (UK) to Liter, you would multiply 10 by 4.54609.

What is a Gallon (UK)?