Convert US gallons to liters
Scenario: A container holds 5 US liquid gallons.
Result: 5 US gallons equals approximately 18.9271 liters.
One US liquid gallon is exactly 3.785411784 liters, multiplied by five.
🔄 Converters
Volume Converter
Convert liters, milliliters, cubic meters, and common US volume units.
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How to use the Volume Converter
Convert liquid and volumetric measurements among metric units and common US customary units.
Convert liquid and solid volume units including liters, milliliters, cubic measures, cups, and gallons. Unit labels specify the supported system because US and imperial volumes differ.
The conversion runs locally using the stated factors or formulas. Keep enough precision for the task and verify regulated or engineering work against its controlling standard.
- Enter a volume value.
- Choose the starting and destination units.
- Fieldlet converts through liters using standard conversion factors.
Last reviewed for accuracy:
Worked examples
Convert a US recipe measure
Scenario: A recipe uses 2 US cups and a metric container is marked in milliliters.
Result: 2 US cups is approximately 473.176 milliliters.
One supported US cup is 236.5882365 milliliters, so the converter doubles that defined factor.
How the result is produced
The converter uses liters as a common base and applies explicit US or imperial definitions. Cubic length values are converted with a cubed linear factor.
- 1 liter = 1,000 milliliters
- 1 US liquid gallon = exactly 3.785411784 liters
- US and imperial cups, pints, and gallons are not identical
Liquid-unit systems are not interchangeable
Fieldlet labels US customary teaspoons, tablespoons, cups, pints, quarts, and gallons explicitly because similarly named imperial units have different sizes. Metric milliliters and liters avoid that naming ambiguity.
- 1 US gallon = 3.785411784 liters.
- 1 US cup = 236.5882365 milliliters.
- Volume-to-mass conversion requires a known density.
Limitations and common mistakes
- Cooking measures can vary by country and recipe convention.
- Converting volume to mass requires the substance's density and conditions.
Common questions
Are the cup and gallon values US units?
Yes. The customary units on this page use US definitions rather than imperial UK definitions.
Can liters be converted directly to kilograms?
Not without density. A liter measures volume and a kilogram measures mass; the relationship depends on the material and conditions.