Convert gallons to liters
Gallon (gal) to liter (l). One gallon equals 3.7854 liters.
Formula
Gallon to liter conversion table
| Gallons | Liters | Liters | Gallons |
|---|---|---|---|
| 1 gal | 3.7854 l | 1 l | 0.264172 gal |
| 2 gal | 7.5708 l | 2 l | 0.528344 gal |
| 3 gal | 11.3562 l | 3 l | 0.792516 gal |
| 5 gal | 18.9271 l | 5 l | 1.3209 gal |
| 10 gal | 37.8541 l | 10 l | 2.6417 gal |
| 20 gal | 75.7082 l | 20 l | 5.2834 gal |
| 50 gal | 189.27 l | 50 l | 13.2086 gal |
| 100 gal | 378.54 l | 100 l | 26.4172 gal |
| 500 gal | 1892.71 l | 500 l | 132.09 gal |
| 1000 gal | 3785.41 l | 1000 l | 264.17 gal |
Decimal gallons to liters conversion table
The exact decimal amounts people look up most often, worked out with the same factor the converter above uses. Every row is calculated, not rounded off a chart.
| Gallons | Liters |
|---|---|
| 0.5 gal | 1.8927 l |
| 1 gal | 3.7854 l |
| 2 gal | 7.5708 l |
| 3 gal | 11.3562 l |
| 4 gal | 15.1416 l |
| 5 gal | 18.9271 l |
| 6 gal | 22.7125 l |
| 7 gal | 26.4979 l |
| 8 gal | 30.2833 l |
| 9 gal | 34.0687 l |
| 10 gal | 37.8541 l |
| 11 gal | 41.6395 l |
| 12 gal | 45.4249 l |
| 13 gal | 49.2104 l |
| 14 gal | 52.9958 l |
| 15 gal | 56.7812 l |
| 16 gal | 60.5666 l |
| 17 gal | 64.352 l |
| 18 gal | 68.1374 l |
| 19 gal | 71.9228 l |
| 20 gal | 75.7082 l |
| 21 gal | 79.4936 l |
| 22 gal | 83.2791 l |
| 23 gal | 87.0645 l |
| 24 gal | 90.8499 l |
| 25 gal | 94.6353 l |
| 26 gal | 98.4207 l |
| 27 gal | 102.21 l |
| 28 gal | 105.99 l |
| 29 gal | 109.78 l |
| 30 gal | 113.56 l |
| 31 gal | 117.35 l |
| 32 gal | 121.13 l |
| 33 gal | 124.92 l |
| 34 gal | 128.7 l |
| 35 gal | 132.49 l |
| 36 gal | 136.27 l |
| 37 gal | 140.06 l |
| 38 gal | 143.85 l |
| 39 gal | 147.63 l |
| 40 gal | 151.42 l |
| 41 gal | 155.2 l |
| 42 gal | 158.99 l |
| 43 gal | 162.77 l |
| 44 gal | 166.56 l |
| 45 gal | 170.34 l |
| 46 gal | 174.13 l |
| 47 gal | 177.91 l |
| 48 gal | 181.7 l |
| 49 gal | 185.49 l |
| 50 gal | 189.27 l |
| 55 gal | 208.2 l |
| 60 gal | 227.12 l |
| 75 gal | 283.91 l |
| 100 gal | 378.54 l |
Liters back to gallons
The same conversion in reverse, for when you have the answer and need the question.
| Liters | Gallons |
|---|---|
| 1 l | 0.264172 gal |
| 5 l | 1.3209 gal |
| 10 l | 2.6417 gal |
| 20 l | 5.2834 gal |
| 50 l | 13.2086 gal |
| 100 l | 26.4172 gal |
Where the gallon to liter factor comes from
- One US liquid gallon is defined as exactly 231 cubic inches.
- That volume is exactly 3.785411784 litres.
- litres = US gallons × 3.785411784. So 5 US gal is 18.93 L and 10 US gal is 37.85 L.
- An imperial (UK) gallon is bigger, exactly 4.54609 L, so 5 imperial gallons would be 22.73 L instead.
Sources
Common mistakes
Which gallon is on the label
A '5 gallon' US bucket holds 18.93 L, but a UK '5 gallon' drum holds 22.73 L. The word gallon alone does not tell you the size; the country does. This converter assumes the US gallon.
Miles per gallon does not convert one to one
US and UK fuel economy both read in 'mpg', but on different gallons, so 40 US mpg is about 48 UK mpg for the same car. Convert the gallon size when comparing, or switch both figures to litres per 100 km.
To convert gallons to liters, multiply the number of gallons by 3.7854. One gallon equals 3.7854 liters, and one liter equals 0.264172 gallons, so the relationship is fixed and exact. As a worked example, 10 gal comes to 37.8541 l. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a volume conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common gallon values already worked out in liters, plus the reverse liter to gallon direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many litres is 5 gallons?
5 US gallons is 18.93 litres. Multiply US gallons by 3.785412: 5 × 3.785412 = 18.93. Five imperial gallons would be 22.73 L.
How many litres is 10 gallons?
10 US gallons is 37.85 litres. The factor is constant, so 20 US gal is 75.71 L.
How many litres in a gallon?
A US gallon is 3.7854 litres; an imperial (UK) gallon is 4.5461 litres. This page uses the US gallon.
How many liters are in a gallon?
One gallon equals 3.7854 liters. The ratio is constant, so you can multiply any number of gallons by 3.7854 to get liters.
What is the formula to convert gallons to liters?
Use liters = gallons × 3.7854. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert liters back to gallons?
Go the other way by using one liter equals 0.264172 gallons. You can also press the swap button in the converter above to flip the direction in one click.
Is this gallon to liter converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.