Gallons to Liters Converter
Convert US gallons to liters instantly. Useful for fuel, water tanks, and cooking.
Formula: gal × 3.78541 = L
Common Conversions
Why Use Our Gallons to Liters Converter?
Instant Results
Type any gallons value and see the liters result immediately as you type.
Highly Accurate
Uses the exact conversion factor. gal × 3.78541 = L
Swap Direction
Easily convert Liters back to Gallons with the swap button. No need to visit a different page.
One-Click Copy
Copy the converted result to your clipboard instantly with the Copy button.
Common Values Table
See a quick reference table of 9 common gallons values and their liters equivalents.
100% Private
All conversions happen in your browser. Nothing is sent to a server or stored anywhere.
Frequently Asked Questions
How many liters in a gallon?
1 gal = see the formula above L. Use the formula: gal × 3.78541 = L.
How to convert gallons to liters?
To convert gallons to liters, use the formula: gal × 3.78541 = L. For example, 5 gal = 18.927 L.
Is this gallons to liters converter accurate?
Yes. The converter uses the internationally accepted exact conversion factor. The result is accurate to at least 6 significant figures.
Can I convert liters back to gallons?
Yes. Click the "Swap direction" button to reverse the conversion. The current result becomes the new input automatically.
Does this work on mobile?
Yes. The converter works on all devices — phones, tablets, and desktops. All calculations happen in your browser.
Is my data stored anywhere?
No. All conversions run entirely in your browser. Nothing is uploaded, logged, or stored.