US Gallons to Liters converter (gal to L)
Convert US Gallons (gal) to Liters (L) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
Liters to US Gallons (L to gal) ►
How to convert US Gallons to Liters
1 US gallon (gal) is equal to 3.78541 liters (L).
L = gal × 3.78541
Multiply the gallons by 3.78541:
Example: Convert 5 gal to liters:
L = 5 × 3.78541 = 18.9271 L
What is a US Gallons?
The US Gallons (gal) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Liters?
The Liters (L) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts volume from US Gallons into Liters. One gal equals 3.78541 L.
US Gallons to Liters conversion table
Common gal values and the matching L result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| US Gallons (gal) | Liters (L) |
|---|---|
| 1 gal | 3.78541 L |
| 2 gal | 7.57082 L |
| 5 gal | 18.92705 L |
| 10 gal | 37.8541 L |
| 20 gal | 75.7082 L |
| 50 gal | 189.2705 L |
| 100 gal | 378.541 L |
How this calculator works
The form on this page is a US Gallons-to-Liters converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the L result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many L are in 1 gal?
1 gal = 3.78541 L.
How do I convert US Gallons to Liters?
Multiply the gallons by 3.78541:
Is this gal to L converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.