US Gallons to Liters Converter
Convert the other wayLiters to US GallonsEnter a volume in US liquid gallons to see litres. Pump labels in the United States use this gallon.
How it works
Multiply US gallons by 3.785411784 to get litres. Five US gallons is 18.9271 L. If your figure is an Imperial gallon (still seen on some UK fuel-economy quotes), that factor is wrong — use 4.54609 L instead, which this page does not apply.
Formula
litres = US gallons × 3.785411784
Worked examples
- 1 US gal → 3.7854 L
- 5 US gal → 18.9271 L
Useful notes
- US liquid gallon only. Imperial gallons are larger.
FAQ
- How many litres are in a US gallon?
- Exactly 3.785411784 litres.
- How many litres in an Imperial gallon?
- 4.54609 litres — not what this converter uses. Pick US vs Imperial on the MPG tools instead.
- Is a gallon of water 3.785 kg?
- A litre of water is about 1 kg, so a US gallon of water is about 3.785 kg at typical density. This tool converts volume, not mass.
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