Gallons to Liters Converter
Convert gallon (us) to liter instantly. 1 gal = 3.785411784 L, worked steps and a full reference table.
How to use it
- Type the value in gallon (us) — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 gal | 3.785411784 L |
| 5 gal | 18.92705892 L |
| 10 gal | 37.85411784 L |
| 100 gal | 378.5411784 L |
One gallon (us) equals 3.7854118 liters (L). To convert gallon (us)s to liters, multiply by 3.7854118; to go back the other way, multiply by 0.26417205 instead.
The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.
What gallon (us)s and liters actually measure
Gallon (US) (gal) — A US gallon is 3.785 litres. Fuel and large liquid volumes in the United States.
Liter (L) — A litre is a thousand cubic centimetres. Drinks, fuel and engine capacity in most of the world.
Gallons to Liters conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| gal | L |
|---|---|
| 1 gal | 3.7854118 L |
| 2 gal | 7.5708236 L |
| 5 gal | 18.927059 L |
| 10 gal | 37.854118 L |
| 25 gal | 94.635295 L |
| 50 gal | 189.27059 L |
| 100 gal | 378.54118 L |
How to convert gallon (us)s to liters by hand
Multiply the number of gallon (us)s by 3.7854118.
For example, 25 gal × 3.7854118 = 94.635295 L.
Going the other way, divide by 3.7854118 — or multiply by 0.26417205, which is the same thing and easier to do in your head.
Everything runs in your browser
There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.
Questions people ask
How many L are in 1 gal?
1 gal equals exactly 3.785411784 L. Multiply any value in gallon (us) by 3.785411784 to get liter.
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Last updated 18 August 2026