Convert UK gallons to liters

1 gal (UK)=4.54609L

Use the converter below to change any UK gallons value into liters instantly — with formula, conversion table, and real-world examples.

You have

Equals

4.54609

Conversion formula

Forward

liters = UK gallons × 4.54609

Reverse

UK gallons = liters × 0.22

Example: 10 gal (UK) × 4.54609 = 45.4609 L.

About both units

From

UK Gallon

gal (UK)

The UK imperial gallon equals 4.54609 litres exactly. Defined in 1824 as the volume of 10 pounds of water at 62 °F. Still used for fuel economy reporting in the UK and some older industrial contexts. The UK imperial gallon is about 20% larger than the US gallon.

Real-world: UK petrol sold by litre since 1995, but economy is quoted in UK mpg: a diesel car at 60 mpg (UK) uses 4.7 L/100 km.

Read full uk gallon reference →

Liter

The litre is the metric volume unit most used in everyday life. It equals 1 cubic decimetre (0.001 m³) or 1000 ml exactly. Bottled water, petrol, milk and household chemicals are all sold by the litre throughout Europe, Africa and Asia.

Real-world: A standard European petrol-car fuel tank is 50–60 L. A 2.0 L engine has a 2 litre displacement. A typical home boiler holds 150 L of hot water.

Read full liter reference →

UK Gallon to Liter conversion table

Common UK gallons to liters values for quick reference.

UK Gallon (gal (UK))	Liter (L)
1 gal (UK)	4.54609 L
2 gal (UK)	9.09218 L
5 gal (UK)	22.7305 L
10 gal (UK)	45.4609 L
20 gal (UK)	90.9218 L
50 gal (UK)	227.305 L
100 gal (UK)	454.609 L
200 gal (UK)	909.218 L
500 gal (UK)	2,273.05 L
1,000 gal (UK)	4,546.09 L

Tips & common mistakes

Quick tips

1 UK gallon = 4.54609 L exactly = 160 UK fluid ounces.
1 UK gallon ≈ 1.201 US gallons.
UK mpg × 0.832 = US mpg (same car, different unit).

Avoid these

Comparing UK mpg with US mpg directly — UK figures are about 20% higher for the same car.
Using 4.5 L instead of 4.546 L for precise conversion.
Assuming modern UK car ads quote US gallons — they always use UK gallons.

Frequently asked questions

How many liters in a uk gallon?

One uk gallon equals 4.54609 liters.

How do I convert UK gallons to liters?

Multiply the uk gallon value by 4.54609 to get the equivalent in liters.

What is 100 UK gallons in liters?

100 UK gallons equals 454.609 liters.

Is a uk gallon bigger than a liter?

Yes. 1 uk gallon equals 4.54609 liters, so one uk gallon is larger.

How to convert UK gallons to liters without a calculator?

Multiply by 4.55 for a quick estimate; use a calculator for precise results.

Related volume conversions

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