Liters to Gallons Converter
Result
1 gallon
Also Equal To
How Liters to Gallons Conversion Works
A liter-to-gallon conversion translates a metric volume measurement into the gallon unit used in the United States and historically in the United Kingdom. One liter equals approximately 0.264172 US gallons or 0.219969 Imperial gallons. These factors are the mathematical inverses of the gallon-to-liter conversions defined by the National Institute of Standards and Technology (NIST).
This conversion is critical for travelers comparing fuel costs, international shippers calculating tank capacities, and anyone moving between metric and US customary measurement systems. According to the US Energy Information Administration, the average US retail gasoline price fluctuates between $2.50 and $4.00 per gallon, while most of the world quotes fuel prices in liters or cubic meters. Understanding the liter-to-gallon relationship is essential for accurate price comparison.
Our Gallons to Liters Converter handles the reverse calculation. For broader volume conversions, use the Volume Converter, and for cooking-specific measurements, see the Cooking Converter.
The Liters to Gallons Formula
The formula divides the liter value by the gallon's liter equivalent:
Gallons = Liters / Conversion Factor
- For US gallons: divide by 3.78541 (or multiply by 0.264172)
- For Imperial gallons: divide by 4.54609 (or multiply by 0.219969)
Worked example: Your European rental car's fuel tank holds 60 liters. In US gallons: 60 / 3.78541 = 15.85 US gallons. If fuel costs EUR 1.65 per liter, a full tank costs EUR 99. In US terms, that is EUR 99 / 15.85 gallons = EUR 6.25 per gallon equivalent -- helpful for comparing to US prices.
Key Terms You Should Know
- Liter (L) -- A metric unit of volume equal to 1,000 milliliters, 1 cubic decimeter, or approximately 0.264 US gallons. The liter is the worldwide standard for liquid volume measurement in commerce, cooking, and fuel sales outside the US.
- US Liquid Gallon -- Equal to 3.78541 liters or 128 US fluid ounces. Used exclusively in the United States for fuel, milk, water, and other liquid retail sales. Derived from the 18th-century English wine gallon.
- Imperial Gallon -- Equal to 4.54609 liters or 160 Imperial fluid ounces. Still referenced in UK fuel economy ratings (mpg) even though UK fuel is sold in liters at the pump. About 20% larger than the US gallon.
- Milliliter (mL) -- One thousandth of a liter. Equal to 1 cubic centimeter. Common for small liquid measurements in cooking, medicine, and science. There are 3,785.41 mL in 1 US gallon.
- L/100km -- Liters per 100 kilometers, the standard fuel consumption metric used outside the US. Lower values indicate better fuel efficiency. Most European cars achieve 5-8 L/100km (29-47 US mpg).
Liters to Gallons Conversion Table
Common liter-to-gallon conversions for both US and Imperial gallons.
| Liters | US Gallons | Imperial Gallons |
|---|---|---|
| 1 L | 0.264 | 0.220 |
| 2 L | 0.528 | 0.440 |
| 5 L | 1.321 | 1.100 |
| 10 L | 2.642 | 2.200 |
| 20 L | 5.283 | 4.399 |
| 40 L | 10.567 | 8.799 |
| 50 L | 13.209 | 10.998 |
| 60 L | 15.850 | 13.198 |
| 100 L | 26.417 | 21.997 |
| 1,000 L | 264.172 | 219.969 |
Practical Examples
Understanding European fuel prices: You see fuel priced at EUR 1.85 per liter in Germany. To understand this in US terms: EUR 1.85 x 3.78541 = EUR 7.00 per US gallon. At a EUR/USD exchange rate of 1.08, that is about $7.56 per US gallon -- roughly double a typical US price. The higher cost reflects European fuel taxes, which fund road infrastructure and climate initiatives. Use our Fuel Efficiency Converter for direct mpg calculations.
Pool chemical dosing: A pool chemical requires dosing at 1 gallon per 10,000 gallons of pool water. Your pool holds 45,000 liters. Converting: 45,000 / 3.78541 = 11,887 US gallons. You need 11,887 / 10,000 = 1.19 gallons of chemical, or about 4.5 liters.
Water consumption tracking: The WHO recommends drinking about 2 liters of water per day. In US terms: 2 / 3.78541 = 0.528 gallons, or about 67.6 fluid ounces. The common "eight glasses a day" guideline (64 fl oz) is approximately 1.89 liters -- close to but slightly under the WHO recommendation. Use our Cups to mL Converter for smaller volume conversions.
Tips for Accurate Liters to Gallons Conversion
- Use the "divide by 4" shortcut: Dividing liters by 4 gives an approximate US gallon value that overestimates by about 5.7%. Example: 40 liters / 4 = 10 US gallons (exact: 10.57). Good enough for quick estimates.
- Remember "4 liters per gallon": One US gallon is slightly less than 4 liters. A 4-liter container holds 1.057 US gallons. This is the easiest anchor point for mental conversion.
- Distinguish US from Imperial for fuel economy: When reading UK car reviews quoting mpg, they use Imperial gallons. A UK rating of 50 mpg (Imperial) equals about 41.6 mpg (US) -- the same car appears to get better mileage in UK numbers because Imperial gallons are larger.
- Use L/100km for international comparison: To convert US mpg to L/100km, divide 235.215 by the mpg figure. To convert L/100km to US mpg, divide 235.215 by the L/100km figure. This single number (235.215) handles all conversions.
- Cross-check with familiar containers: A 2-liter soda bottle is about 0.53 US gallons (half a gallon). A US gallon jug of milk is about 3.79 liters. Use these familiar objects as mental calibration points.
Global Fuel Measurement Standards
The liter is the dominant unit for fuel sales worldwide. Canada switched from Imperial gallons to liters in the 1970s during its metrication program. The UK began selling fuel in liters in 1995, although British fuel economy is still reported in miles per Imperial gallon. According to the BIPM, the liter was originally defined in 1795 as the volume of one kilogram of pure water at 4 degrees Celsius. Since 1964, it has been defined as exactly 1 cubic decimeter (1,000 cubic centimeters). The US remains the only major economy where fuel is sold by the gallon at retail, though US automotive manufacturers increasingly include L/100km ratings alongside mpg on new vehicle window stickers.
Frequently Asked Questions
How many gallons is 1 liter?
One liter equals approximately 0.2642 US gallons or 0.2200 Imperial gallons. The precise value is 1 divided by 3.785411784, giving 0.264172 US gallons. For quick mental math, remember that 4 liters is slightly more than 1 US gallon (1.057 gallons exactly). A standard 1-liter bottle is slightly more than 1 US quart (1.057 quarts). This conversion is defined by NIST.
How many gallons is 2 liters?
2 liters equals approximately 0.528 US gallons or 0.440 Imperial gallons. The calculation is 2 x 0.264172 = 0.528344 US gallons. A standard 2-liter soda bottle holds just over half a US gallon -- specifically, about 67.6 US fluid ounces out of 128 in a gallon. In more familiar terms, 2 liters is about 8.45 US cups. The 2-liter format was introduced in the US in 1970 by Pepsi, making it one of the earliest metric consumer products in American retail.
How do I convert liters per 100 km to miles per gallon?
To convert L/100km to US mpg, divide 235.215 by the L/100km value. For example, a car consuming 8 L/100km equals 235.215 / 8 = 29.4 US mpg. For Imperial mpg, divide 282.481 by the L/100km value. Note that L/100km is an inverse scale -- lower numbers mean better fuel economy, while higher mpg numbers mean better economy. The average European car consumes about 6-7 L/100km (34-39 US mpg).
How many liters is a US gallon of gas?
One US gallon of gasoline equals exactly 3.785411784 liters. When you buy 10 gallons at the pump, you are purchasing 37.85 liters. According to the EIA, the US consumes about 369 million gallons (1.4 billion liters) of gasoline daily. When comparing fuel prices internationally, US gas at $3.50 per gallon equals $0.92 per liter, while European fuel at EUR 1.70 per liter equals about EUR 6.44 per US gallon.
What is 20 liters in gallons?
20 liters equals approximately 5.283 US gallons or 4.399 Imperial gallons. The US gallon calculation is 20 / 3.78541 = 5.2834 gallons. The 20-liter volume is significant because it is a standard jerry can size used worldwide for fuel transport. A 20-liter jerry can holds about 5.3 US gallons of fuel, weighing approximately 14.9 kg (32.8 pounds) when filled with gasoline. Many countries restrict portable fuel containers to 20 liters for safety.
How many liters is a 5-gallon bucket?
A 5-gallon bucket holds approximately 18.927 liters (US gallons) or 22.730 liters (Imperial gallons). In practice, most 5-gallon buckets sold in the US hold exactly 18.93 liters. These are standard in construction, food service, and homebrewing. A full 5-gallon bucket of water weighs about 41.7 pounds (18.9 kg). The 5-gallon standard evolved from historical barrel fractions -- the standard US barrel is 31.5 gallons, and 5 gallons became a common subdivision.