Gallons to Liters Converter
Convert gallons to liters, or liters to gallons, instantly.
Volume Conversion Formula
Liters = gallons × 3.78541. Gallons = liters ÷ 3.78541.
Worked example
Convert 5 gallons to liters.
5 × 3.78541 ≈ 18.927
5 gallons ≈ 18.927 liters
Worked example (liters to gallons)
Convert 10 liters to gallons.
10 ÷ 3.78541 ≈ 2.642
10 liters ≈ 2.642 gallons
Quick reference: gallons to liters
| Gallons | Liters |
|---|---|
| 1 quart (1/4 gal) | 0.946 |
| 1/2 gallon | 1.893 |
| 1 gallon | 3.785 |
| 5 gallons | 18.927 |
| 55 gallons (drum) | 208.198 |
Keep going
- Gallons-to-liters and ml-to-oz are the same metric-to-imperial volume conversion at opposite ends of the scale; the ml to oz calculator handles the smaller-volume version. ML ↔ OZ Calculator
Frequently Asked Questions
How many liters are in a gallon?
1 US gallon = 3.78541 liters.
How many gallons are in a liter?
1 liter = 0.264172 US gallons.
Is a US gallon the same as a UK (imperial) gallon?
No. A US gallon is 3.78541 liters, while a UK imperial gallon is larger at 4.54609 liters. This calculator uses the US gallon.
How many liters are in a standard 55-gallon drum?
55 × 3.78541 ≈ 208.2 liters (208.19755, rounded). Industrial and shipping drums are almost always sized in US gallons even outside the US, so this is the figure printed on most drum spec sheets.
How do gallons split into quarts, pints, and cups?
1 US gallon = 4 quarts = 8 pints = 16 cups. Since a gallon is 3.78541 liters, a quart works out to 3.78541 ÷ 4 ≈ 0.946 liters and a cup to 3.78541 ÷ 16 ≈ 0.237 liters.
How does a liquor bottle 'fifth' relate to gallons and liters?
A historic 'fifth' of liquor was exactly 1/5 of a US gallon — 3.78541 ÷ 5 ≈ 0.757 liters (757 ml). Modern bottles are metric-standardized at 750 ml instead, just slightly smaller than the old fifth.
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