How accurate is this converter?

This converter uses the exact conversion factor (1 US gallon = 3.78541 liters) for precise results.

Yes, completely free with no sign-up required.

Can I convert in the opposite direction?

Yes, use our Liters to Gallons converter for the opposite conversion.

Convert US gallons to liters instantly. Free online gallons to liters volume converter.

US Gallons (gal)

1 US gallon = 3.78541 liters

Multiply the value in US gallons by 3.78541 to get liters.