Gallon to Liter Converter
Convert gallons to liters. Supports US and UK/Imperial gallon measurements.
1 US Gallon(s) =
3.7854 liters
All Conversions
3.7854
Liters
3,785.41
Milliliters
4
Quarts
16
Cups
Gallon Types
US Gallon3.78541 L
UK/Imperial Gallon4.54609 L
Note: The UK gallon is about 20% larger than the US gallon.
Quick Reference (US)
1/2 gallon
= 1.89 liters
1 gallon
= 3.79 liters
5 gallons
= 18.93 liters
10 gallons
= 37.85 liters
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: NIST Guide to SI Units
by National Institute of Standards
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.