Convert Liter to US Gallon
Convert liters to us gallons instantly. 1 liter = 0.2641720524 us gallon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Gallon to Liter converter for the reverse conversion.
Units explained
Liter
The liter is a metric unit of volume equal to one cubic decimeter (0.001 m³). It is the everyday metric volume unit.
Introduced in France in 1795; redefined in 1964 as exactly one cubic decimeter.
The world's common unit for beverages, fuel, and household liquids.
France, 1795; CGPM 1964.
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Liter to US Gallon conversion formula
The relationship between liters and us gallons:
To convert liters to us gallons, multiply the value in liters by 0.2641720524. To reverse, multiply us gallons by 3.785411784.
How to use this converter
Type a value into the calculator. The result in us gallons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Gallon to Liter converter for the reverse direction.
Step-by-step: convert liters to us gallons
- Write down the value in liters (L).
- Multiply that value by the factor 0.2641720524.
- The product is the equivalent value in us gallons (gal).
- To reverse, multiply the us gallon value by 3.785411784.
Worked examples
Example 1 — Convert 1 L to gal:
1 × 0.2641720524 = 0.2641720524 gal
Example 2 — Convert 100 L to gal:
100 × 0.2641720524 = 26.4172052358 gal
Real-world example — Hardware-scale dimensions
A 10-liter fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between liters and us gallons daily when mixing metric and imperial tools.
10 L × 0.2641720524 = 2.6417205236 gal
Real-world example — Postcard and small-object dimensions
A postcard is about 5 liters wide. Converting to us gallons is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 L × 0.2641720524 = 1.3208602618 gal
Real-world example — Ruler-scale measurements
A 30-liter school ruler converts cleanly to us gallons — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 L × 0.2641720524 = 7.9251615707 gal
Liter to US Gallon conversion table
Standard reference values for converting liters to us gallons:
| Liter [L] | US Gallon [gal] |
|---|---|
| 0.01 | 0.0026417205 |
| 0.1 | 0.0264172052 |
| 1 | 0.2641720524 |
| 2 | 0.5283441047 |
| 3 | 0.7925161571 |
| 4 | 1.0566882094 |
| 5 | 1.3208602618 |
| 10 | 2.6417205236 |
| 20 | 5.2834410472 |
| 30 | 7.9251615707 |
| 40 | 10.5668820943 |
| 50 | 13.2086026179 |
| 100 | 26.4172052358 |
| 500 | 132.0860261791 |
| 1000 | 264.1720523581 |
Frequently asked questions
How many us gallons is 1 liter?
How do I convert liters to us gallons?
How do I convert us gallons back to liters?
How many us gallons is 100 liters?
Popular volume unit conversions
Convert Liter to other volume units
Show all Liter conversions
Metric / SI (13 units)
US Customary (Liquid) (15 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Industrial / Specialized (6 units)
Sources & references
Conversion factor (1 L = 0.2641720524 gal) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.