Conversions

Gallons to Liters Calculator

Convert US liquid gallons to liters.

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Gallons to Liters Calculator

Enable JavaScript to use the interactive calculator; the example and formula are described below.

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How to use this gallons to liters calculator

Enter the values requested above and select Calculate. Change any input to compare another scenario. The calculation runs locally in your browser and does not require an account.

Formula and method

Liters = US gallons × 3.785411784.

Example

5 US gallons ≈ 18.927 liters.

What this calculator is useful for

Convert US liquid gallons to liters. The result is intended for quick estimates, checking arithmetic and comparing scenarios. When a result affects a contract, tax filing, medical decision, building-code requirement or other high-stakes situation, verify the result with the appropriate professional or authoritative source.

Gallons to Liters Calculator: a practical example

Five U.S. gallons equal about 18.93 liters (5 × 3.785411784).

What the result means

This is the U.S. liquid gallon commonly used for fuel purchases.

Limits to consider

An imperial gallon is larger and gives a different conversion.

Related tools: Fuel Economy Converter · Inches to CM Calculator

Frequently asked questions

What does the Gallons to Liters Calculator calculate?

Convert US liquid gallons to liters.

How does the Gallons to Liters Calculator work?

Liters = US gallons × 3.785411784.

Is the Gallons to Liters Calculator free to use?

Yes. ERICH Calculators is free to use and does not require an account.

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Method, assumptions & corrections

See how formulas, sources and limitations are handled across ERICH Calculators.