CONVERSION · EN
US & Imperial gallons to liters
Convert U.S. liquid gallons or imperial gallons to liters (L) without mixing the two gallon definitions.
Guide
Formula
1 U.S. gal = 3.785411784 L; 1 imp gal = 4.54609 L
The word “gallon” is ambiguous: the U.S. liquid gallon and imperial gallon are different volumes. The converter requires or displays the variant explicitly to avoid a silent regional assumption.
Note : If a source only says “gal”, verify which gallon system it uses before converting.
Example : 5 gal US
U.S. gallons
Display rounded to at most 6 decimal places.
| gal US | L |
|---|---|
| 1 | 3.785412 |
| 2 | 7.570824 |
| 5 | 18.927059 |
| 10 | 37.854118 |
| 20 | 75.708236 |
Imperial gallons
Display rounded to at most 6 decimal places.
| gal imp | L |
|---|---|
| 1 | 4.54609 |
| 2 | 9.09218 |
| 5 | 22.73045 |
| 10 | 45.4609 |
| 20 | 90.9218 |
Related conversions
Definition sources
Measurement
Enter a value and its unit.
Calculation details and sources are available below the result.
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Useful conversions
Approximate fraction
This approximation certifies neither a part nor an instrument’s accuracy.
Fractions and precision
| Step | Fraction | Error in mm | Limit |
|---|
Error = approximate fraction − requested measurement. Exact comparison before display rounding.
A list
One measurement per line. The unit is detected independently on every line, including common typos.
Applies only to numbers without a unit. Written units always take precedence.
For bare numbers, choose their common unit. No unit is guessed.
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| Line | Original | Detected | To | Result | Status |
|---|