Gallons to Liters (gal to L) Converter
1 US gallon = 3.78541 liters. 1 UK imperial gallon = 4.54609 liters.
Formula:1 US gal = 3.78541 L
⇄ Switch to Liters To GallonsLiter to Liter — common values
How to convert Gallons To Liters
To convert gallons to liters, use the formula: 1 US gal = 3.78541 L. Enter any value in the input field above and the result appears instantly. Click the ⇄ button or use the “Switch to Liters To Gallons” link to reverse the conversion.
All conversions use precise mathematical constants validated against international SI standards (NIST and ISO 80000) and are accurate to 8 significant figures.
Frequently Asked Questions
What is the formula to convert Gallons To Liters?
1 US gal = 3.78541 L. 1 US gallon = 3.78541 liters. 1 UK imperial gallon = 4.54609 liters.
Is this converter free?
Yes — completely free, no registration required. Works instantly in your browser.
How do I convert Liters To Gallons?
Use the Liters To Gallons converter or click the ⇄ switch button above.
More Volume conversions
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The full converter supports all unit combinations