# Gallons to Liters

> Convert gallons to liters, in US liquid or Imperial units. Shows the formula, the substituted working, and a reference table for both standards.

**URL:** https://www.calculatoranswers.com/gallons-to-liters
**Category:** Conversions

## Quick Answer

Multiply gallons by 3.785411784 for US liquid, or by 4.54609 for Imperial. For example, 5 US gallons is 18.93 liters.

## Definition

A volume conversion tool that turns gallons into liters. One US liquid gallon is exactly 3.785411784 liters, following from its statutory definition as 231 cubic inches. One Imperial gallon is exactly 4.54609 liters. The Imperial gallon is about 20% larger, so the standard has to be stated.

## How to Use

1. **Choose the gallon standard** — Select US liquid or Imperial. The two differ by about 20%, so the choice changes the answer materially.
2. **Enter the volume in gallons** — Type the gallon figure you want to convert.
3. **Read the liter result** — The answer appears with the multiplication substituted, a reverse check, and the standard named.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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