How many UK gallons are in one liter?

One liter equals exactly 1 ÷ 4.54609 ≈ 0.219969 UK imperial gallons. Equivalently, one UK gallon equals exactly 4.54609 liters.

Is the UK gallon the same as the US gallon?

No. The UK imperial gallon is about 20% larger. 1 UK gal = 4.54609 L, while 1 US liquid gallon = 3.785412 L. This tool uses the UK imperial gallon only.

Where does the 4.54609 factor come from?

The UK imperial gallon is defined by the Weights and Measures Act 1985 as exactly 4.54609 liters. This is the legally binding definition used throughout the United Kingdom.

Can I convert UK gallons back to liters?

Multiply the UK gallon value by 4.54609 to get liters. For example, 5 UK gal × 4.54609 = 22.730 L.

Does this handle large volumes like thousands of liters?

Yes. The tool works for any positive number and formats the result to six significant figures, which handles everything from small containers to industrial tank volumes.

Liters to UK Gallons Converter

Enter a volume in liters and get the exact equivalent in UK (imperial) gallons instantly.

Enter Volume in Liters

Liters (L)

Quick presets

Formula: UK gal = L ÷ 4.54609 · 1 UK gal = 4.54609 L

UK Gallons Result

Enter a value in liters to see the UK gallons equivalent

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Summary

This tool converts any volume in liters to UK imperial gallons using the exact conversion factor: 1 UK gallon = 4.54609 liters (as defined by the Weights and Measures Act 1985). Results update instantly as you type. Use the quick presets for common volumes like 1, 5, 10, 20, or 50 liters.

How it works

Enter a volume in liters in the input field.
The tool divides the value by 4.54609 to get UK imperial gallons.
The result updates instantly as you type.
Click a preset button to load a common volume.
Use the Copy button to copy the result to your clipboard.
Press the clear button or delete the input to reset.

Use cases

Convert fuel tank sizes from liters to UK gallons for British vehicles.
Translate European beverage container volumes to UK imperial gallons.
Calculate aquarium or water-butt capacity in UK gallons.
Convert irrigation or water-usage figures for UK reports.
Verify product capacities listed in metric for UK distribution.
Quick reference when buying bulk liquids priced per imperial gallon.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu