Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 gal(UK) | 0.00454609 L | |
| 0.01 gal(UK) | 0.0454609 L | |
| 0.1 gal(UK) | 0.454609 L | |
| 1 gal(UK) | 4.54609 L | |
| 5 gal(UK) | 22.7305 L | |
| 10 gal(UK) | 45.4609 L | |
| 50 gal(UK) | 227.305 L | |
| 100 gal(UK) | 454.609 L | |
| 1000 gal(UK) | 4546.09 L |
Common uk gallon values converted to liter — factor: 1 gal(UK) = 4.546 L
| UK Gallon (gal(UK)) | Liter (L) | Context |
|---|---|---|
| 0.0065 gal(UK) | 0.02955 L | Tablespoon |
| 0.025 gal(UK) | 0.1137 L | Quarter cup |
| 0.05 gal(UK) | 0.2273 L | Cup |
| 0.125 gal(UK) | 0.5683 L | UK pint |
| 0.25 gal(UK) | 1.137 L | UK quart |
| 0.5 gal(UK) | 2.273 L | Half UK gallon |
| 1 gal(UK) | 4.546 L | UK gallon |
| 2 gal(UK) | 9.092 L | Two UK gallons |
| 5 gal(UK) | 22.73 L | Jerrycan |
| 10 gal(UK) | 45.46 L | 10-gallon drum |
| 20 gal(UK) | 90.92 L | 20-gallon tank |
| 35 gal(UK) | 159.1 L | UK oil barrel |
| 55 gal(UK) | 250 L | Drum barrel |
| 100 gal(UK) | 454.6 L | Large drum |
| 1,000 gal(UK) | 4,546 L | Tank |
Converting uk gallon to liter comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using liter, or a laboratory protocol may specify volumes in uk gallon that need to be measured with equipment calibrated in liter.
In everyday use, knowing that 5 gal(UK) = 22.73 L and 10 gal(UK) = 45.46 L covers most common situations. For bulk calculations, 100 gal(UK) = 454.6 L is a useful anchor. The reverse conversion — liter back to uk gallon — uses the factor 0.22, so 1 L = 0.22 gal(UK).
All conversions use the internationally recognized factor of exactly 1 gal(UK) = 4.546 L. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Liter = UK Gallon × 4.54609
Multiply any uk gallon value by 4.54609 to get liter. One uk gallon equals 4.54609 L.
Reverse: UK Gallon = Liter × 0.21996925
UK gallons × 4.546 = liters. Round to × 4.5 for quick estimates.
One Imperial gallon = 8 Imperial pints = 4.546 L.
UK gallon is 20% larger than US gallon — don't mix them up.
Calculates fuel economy in miles per Imperial gallon, the standard UK efficiency metric.
Orders bulk beer kegs rated in Imperial gallons and reconciles against pint servings.
Applies pesticides at rates specified in Imperial gallons per acre in legacy manuals.
Calculates boat fuel range using Imperial gallons for UK coastal navigation.
Converts UK heating oil deliveries between Imperial gallons and liters for EU reports.
References older British Pharmacopoeia formulations using Imperial gallon quantities.
The Imperial gallon was defined by the British Weights and Measures Act of 1824 as the volume of ten pounds of water at 62°F, later fixed to exactly 4.54609 liters in 1985.
UK gallons are still used in Britain for fuel pricing. Road signs show consumption in miles per Imperial gallon, making UK cars appear more fuel-efficient than identical US models.
Interesting fact: 1 Imperial gallon = 1.20095 US gallons. Confusing the two has caused real-world errors in cross-border fuel cost calculations.
The liter was introduced by the French metric system in 1793, defined as the volume of one kilogram of pure water at 4°C. The word derives from the older French unit litron, from Medieval Latin litra. It was redefined in 1964 as exactly 1 cubic decimeter.
France adopted the liter as part of revolutionary metric standardization, spreading across Europe with Napoleonic expansion. Today it is the standard unit for liquids in most of the world, from soda bottles to fuel pumps.
Interesting fact: A liter of water at 4°C weighs almost exactly 1 kilogram, which is why the kilogram was originally defined through it.