Calculators toolsUpdated July 2026
Free Gallons to Liters Converter
Convert US gallons to liters online for free, directly in your browser.
Free online tool
No signup
Direct download
Browser-first privacy
AdvertisementTop tool sponsor space
Enter a value to convert.
Your numbers stay in your browser.
AdvertisementBelow tool sponsor space
How to convert gallons to liters
- Type a value in US gallons.
- The result in liters updates instantly.
gallons to liters formula
1 US gallon = 3.785411784 liters exactly. Multiply the gallon value by 3.785411784 to get liters.
Common use cases
- Convert a US fuel volume from gallons to liters
- Check a container size listed in gallons
Frequently asked questions
Is this gallons to liters converter free?
Yes, with no signup or watermark.
Are my numbers uploaded?
No. The conversion runs locally in your browser.
Which gallon does this use?
The US liquid gallon (3.785411784 liters), not the UK imperial gallon.
Can I convert liters to gallons here too?
Yes. Use the swap button, or visit the liters to gallons page directly.