Converters
12
US gallons to Liters Converter
Convert us gallons to liters instantly with the formula, worked examples, rounding guidance, and related volume conversions.
Units
85
Mode
Live
Pair-specific conversion guide
US gallon to Liter formula
The US gallon is a unit of volume used in the United States, equal to 3.785411784 liters. This conversion is essential for measuring liquids like fuel or milk. The liter, a metric unit, is widely used globally. Converting gallons to liters requires multiplying the gallon value by 3.785411784.
Formula model
1 gal = 3.785411784 L
1 US gallon equals
Quick factor: 1 gal = 3.785411784 L.
For quick estimates, remember 1 US gallon is about 3.8 liters.
Use the exact factor 3.785411784 for precise scientific or engineering calculations.
Check the measurement system for cooking units: US customary and imperial volumes are not always the same.
Precision and rounding
The calculation uses the catalog's fixed conversion factors between gal and L. Full decimal precision is kept for the calculation; only the displayed value is rounded for readability.
Reference: NIST conversion factorsVolume
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Conversion table
1 US gallon equals
| Unit | Value |
|---|---|
| Liter L | 3.785411784 |
| Milliliter mL | 3785.411784 |
| Cubic meter m3 | 0.003785411784 |
| US teaspoon tsp | 768 |
| US tablespoon tbsp | 256 |
| US fluid ounce fl oz | 128 |
| US cup cup | 16 |
| US pint pt | 8 |
| US quart qt | 4 |
FAQ
US gallon to Liter questions
How many liters are in 5 US gallons?
5 US gallons equal 18.92705892 liters, calculated by multiplying 5 by 3.785411784.
Is the US gallon the same as the imperial gallon?
No, the US gallon is smaller. 1 US gallon equals 3.785411784 liters, while 1 imperial gallon equals about 4.54609 liters.