This gallons to liters converter gives you the gal to L result instantly, in your browser, with the exact ratio so you can verify it. 1 gallon is about 3.78541 liters, and going the other way, 1 liter is 0.264172 gallons. Gallons are a US customary unit; liters are part of the metric system used in most countries.
To convert by hand, multiply the number of gallons by 3.78541. For example, 10 gallons is 37.8541 liters and 100 gallons is 378.541 liters. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
gal to L formula
L = gal × 3.78541
1 gallon is about 3.78541 liters. Multiply the value in gallons by that factor to get liters.
Gallons to Liters conversion table
| gallons | liters | Rounded |
|---|---|---|
| 1 gal | 3.78541 L | 3.79 |
| 2 gal | 7.57082 L | 7.57 |
| 3 gal | 11.3562 L | 11.4 |
| 4 gal | 15.1416 L | 15.1 |
| 5 gal | 18.9271 L | 18.9 |
| 6 gal | 22.7125 L | 22.7 |
| 7 gal | 26.4979 L | 26.5 |
| 8 gal | 30.2833 L | 30.3 |
| 9 gal | 34.0687 L | 34.1 |
| 10 gal | 37.8541 L | 37.9 |
| 12 gal | 45.4249 L | 45.4 |
| 15 gal | 56.7812 L | 56.8 |
| 20 gal | 75.7082 L | 75.7 |
| 25 gal | 94.6353 L | 94.6 |
| 30 gal | 113.562 L | 114 |
| 40 gal | 151.416 L | 151 |
| 50 gal | 189.271 L | 189 |
| 60 gal | 227.125 L | 227 |
| 70 gal | 264.979 L | 265 |
| 75 gal | 283.906 L | 284 |
| 80 gal | 302.833 L | 303 |
| 90 gal | 340.687 L | 341 |
| 100 gal | 378.541 L | 379 |
| 150 gal | 567.812 L | 568 |
| 200 gal | 757.082 L | 757 |
| 250 gal | 946.353 L | 946 |
| 300 gal | 1,135.62 L | 1,136 |
| 500 gal | 1,892.71 L | 1,893 |
| 750 gal | 2,839.06 L | 2,839 |
| 1,000 gal | 3,785.41 L | 3,785 |
Frequently asked questions
How many liters are in 5 gallons?
5 gal = 18.9271 L. Multiply 5 by 3.78541, the number of liters in one gallon. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert gallons to liters?
L = gal × 3.78541. The factor comes from the definitions of the units: 1 gallon is about 3.78541 liters. Worked example: 12 gal = 45.4249 L.
Is 30 gal the same as 113.562 L?
Yes. 30 gal = 113.562 L. Rounded to four decimals it is 113.6 L.
How do I convert liters back to gallons?
Divide by 3.78541, or multiply by 0.264172: 1 liter is 0.264172 gallons. The liters to gallons page linked above lists common values the other way.
Is the gal to L conversion exact?
1 gallon is about 3.78541 liters. The ratio is a defined constant but produces a long decimal, so this page rounds to six significant digits, which is more precision than any everyday measurement needs.