How to Calculate Liters to Gallons
What is Liters to Gallons?
A liters to gallons converter converts volume measurements between the metric system (litres) and the US customary or imperial systems (gallons). One US gallon equals approximately 3.785 litres.
Formula
gal_US = L × 0.264172; gal_UK = L × 0.219969
- L
- Volume in litres (L) — Metric unit of volume
- gal_US
- US gallons (US gal) — 1 US gallon = 3.78541 litres
- gal_UK
- UK gallons (UK gal) — 1 UK gallon = 4.54609 litres
Step-by-Step Guide
- 11 US Gallon = 3.78541 litres
- 21 Imperial Gallon = 4.54609 litres
- 3Litres ÷ 3.78541 = US Gallons
- 4Litres ÷ 4.54609 = Imperial Gallons
Worked Examples
Input
10 litres
Result
2.642 US gallons or 2.200 imperial gallons
Input
1 litre
Result
0.264 US gallons
Input
50 litres (fuel tank)
Result
13.21 US gallons
Frequently Asked Questions
How many litres is a US gallon?
1 US gallon = 3.785 litres. A UK (imperial) gallon is larger at 4.546 litres. Always verify which type is meant — they differ by about 20%.
Why are US and UK gallons different?
The US gallon derives from the wine gallon used in colonial times; the UK gallon was standardised in 1824 as 10 pounds of water. The US retained the older standard.
How many litres in a half-gallon?
A US half-gallon = 1.893 litres (common milk jug size). A UK half-gallon = 2.273 litres.
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