Liters to Gallons Converter
Enter the volume in liters below to convert it to gallons.
Convert Liters to Gallons (US)
Enter a value in liters (L) to convert to gallons (us) (gal (US)).
Liter to Gallon Conversion Table
Table showing various liter measurements converted to gallons. Click any preset value or arrow to load it into the converter.
| Liters (L) | Gallons (US) (gal (US)) |
|---|---|
| 1 L | 0.2641721 gal (US) |
| 2 L | 0.5283441 gal (US) |
| 5 L | 1.3208603 gal (US) |
| 10 L | 2.6417205 gal (US) |
| 15 L | 3.9625808 gal (US) |
| 20 L | 5.283441 gal (US) |
| 25 L | 6.6043013 gal (US) |
| 30 L | 7.9251616 gal (US) |
| 40 L | 10.5668821 gal (US) |
| 50 L | 13.2086026 gal (US) |
How to Convert Liters to Gallons
To convert liters to gallons, multiply the volume by the following conversion ratio: 0.2641721 gallons/liter.
Since one liter is equal to 0.2641721 gallons, you can use this simple formula to convert:
The volume in gallons is equal to the volume in liters multiplied by 0.2641721.
For example, here's how to convert 40 liters to gallons using the formula above.
How Many Gallons Are in a Liter?
There are 0.2641721 gallons in a liter, which is why we use this value in the formula above.
Our liter to gallon calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Liters and gallons are both units used to measure volume. Keep reading to learn more about each unit.
What Is a Liter?
Metric unit of volume equal to 1 cubic decimeter (1,000 mL). It serves as a primary reference unit for measuring volume across scientific and practical applications. [1]
The liter is classified as a metric and SI-compatible unit of volume. Liters can be abbreviated as L; for example, 1 liter can be written as 1 L.
As the primary coherent reference unit for volume in this category, all other volume units are mathematically anchored to the liter (L).
In practice, liters (L) are widely used across standard volume applications within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Gallon?
A gallon is a unit of volume equal to 3.7854118 liters (L), the base unit for volume. US liquid gallon defined as exactly 231 cubic inches (3.78541 L). [2]
The gallon is classified as a US customary unit of volume. Gallons can be abbreviated as gal (US); for example, 1 gallon can be written as 1 gal (US).
When working with gallons (gal (US)) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gallons (gal (US)) are widely used across standard volume applications within US customary workflows, engineering documentation, and technical data sheets.
When converting volume between liters (L) and gallons (gal (US)), keep full floating-point precision (1 L = 0.2641721 gal (US); 1 gal (US) = 3.7854118 L) during intermediate calculations and round only the final gallon figure to match your instrument tolerance.
More Liter & Gallon Conversions
Need to calculate in the opposite direction? Use our gallons (us) to liters converter (gal (US) to L) to switch your starting unit immediately. You can also explore related tools such as converting quarts (us) to gallons (us), converting cubic feet to gallons (us), or converting liters to cups (us).
Convert from Liters
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Liters (L) to Gallons (US) (gal (US))
- [2]NIST HB 44 SpecificationNIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Liter (L) & Gallon (US Liquid) (gal (US))
- [3]NIST SP 811 ReferenceNIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (L to gal (US))