Direct answer
What is the liters-to-US-gallons formula?
Multiply liters by 0.2641720524 to calculate US liquid gallons. The equivalent method divides liters by 3.785411784.
The division value is based on the exact relationship that one US liquid gallon equals 3.785411784 liters.
The multiplication factor is the reciprocal of the number of liters in one gallon.
Enter a whole or decimal liter value and receive the calculated US-gallon result.
Main equations
The two standard conversion methods
Useful for calculators, spreadsheets, code, and repeated conversions.
Divides the volume by the number of liters in one gallon.
Both equations provide equivalent answers. Small differences can appear only when a shortened conversion factor is used or the result is rounded at different stages.
Conversion-factor origin
Where does 0.2641720524 come from?
One US liquid gallon equals exactly 3.785411784 liters. Therefore, one liter is one divided by 3.785411784 US gallon.
One liter therefore equals approximately 0.2641720524 US gallon.
The displayed multiplication factor is rounded. Using more digits can retain slightly more numerical precision, but most everyday conversions do not require every available decimal place.
Opposite conversion directions
Why the two factors look different
Liters to gallons and gallons to liters use reciprocal factors because the conversion direction changes.
Or divide by 3.785411784
Or divide by 0.264172
One gallon is larger than one liter
Multiplying liters by 3.785411784 reverses the intended conversion and produces an incorrect result.
Formula applications
Worked examples using the formula
Convert 3.785411784 liters
This liter value equals exactly one US liquid gallon.
Convert 8 liters
Eight liters equals approximately 2.11338 US gallons.
Convert 25 liters
Twenty-five liters equals approximately 6.60430 US gallons.
Convert 200 liters
Two hundred liters equals approximately 52.8344 US gallons.
Non-whole measurements
Using the formula with decimal liters
Decimal liter measurements are inserted into the same equation without modification.
Convert 0.75 liter
Three-quarters of a liter equals approximately 0.198129 US gallon.
Convert 12.5 liters
Twelve and one-half liters equals approximately 3.30215 US gallons.
Keep the original decimal value during the calculation and round only the final result.
Opposite direction
What is the US-gallons-to-liters formula?
One US liquid gallon equals exactly 3.785411784 liters.
For 5 US gallons:
Five US liquid gallons equals approximately 18.9271 liters.
Choosing factor length
How many conversion-factor digits should be used?
| Factor | Typical use | 20-liter result |
|---|---|---|
| 0.26 | Rough estimate | 5.2 US gal |
| 0.264 | Closer estimate | 5.28 US gal |
| 0.264172 | General accurate conversion | 5.28344 US gal |
| 0.2641720524 | Detailed calculation | 5.283441048 US gal |
Use enough digits for the task, but do not imply more real-world accuracy than the original measurement provides.
Formula limitations
The factor applies only to US liquid gallons
Imperial gallons and US dry gallons have different volumes. The factor 0.2641720524 should not be used for those units.
Matches this formula
Requires another factor
Different volume definition
Continue reading
Related liters-to-US-gallons guides
Questions and answers
Frequently asked questions
What is the formula for liters to US gallons?
Multiply liters by approximately 0.2641720524.
Can I divide liters to calculate gallons?
Yes. Divide liters by 3.785411784.
Why is the factor approximately 0.264172?
It is the reciprocal of 3.785411784 liters per US liquid gallon.
Does the formula apply to imperial gallons?
No. Imperial gallons use a different conversion factor.
Convert a volume
Use the Liters to US Gallons Converter
Enter any positive whole or decimal liter measurement to calculate US liquid gallons instantly.
Open Liters to US Gallons ConverterLast updated: July 27, 2026