1 L to Gallons – Full Calculation Guide

1 liter is equal to approximately 0.2642 gallons.

This conversion is based on the fact that 1 liter is a metric unit of volume, while gallons are used in the US customary and imperial systems. The US liquid gallon is defined as exactly 3.78541 liters, so converting liters to gallons involves dividing the liter value by this number.

Conversion Tool


Result in gallons:

Conversion Formula

The formula to convert liters to gallons is:

Gallons = Liters ÷ 3.78541

This works because one US liquid gallon contains exactly 3.78541 liters. So, dividing the number of liters by 3.78541 tells you how many gallons it equals. For example, converting 1 liter:

  • Start with 1 liter.
  • Divide by 3.78541: 1 ÷ 3.78541 = 0.264172 gallons approximately.
  • This means 1 liter is about 0.2642 gallons.

Conversion Example

  • Convert 5 liters to gallons:
    • Take 5 liters.
    • Divide by 3.78541: 5 ÷ 3.78541 = 1.3209 gallons.
    • So, 5 liters equals about 1.3209 gallons.
  • Convert 10 liters to gallons:
    • Start with 10 liters.
    • Divide 10 by 3.78541: 10 ÷ 3.78541 = 2.6417 gallons.
    • 10 liters is approximately 2.6417 gallons.
  • Convert 0.5 liters to gallons:
    • Begin with 0.5 liters.
    • Divide 0.5 by 3.78541: 0.5 ÷ 3.78541 = 0.1321 gallons.
    • Therefore, 0.5 liters equals about 0.1321 gallons.
  • Convert 15 liters to gallons:
    • Take 15 liters.
    • Divide 15 by 3.78541: 15 ÷ 3.78541 = 3.9625 gallons.
    • Thus, 15 liters are about 3.9625 gallons.

Conversion Chart

Liters (l) Gallons (gal)
-24.0 -6.3406
-20.0 -5.2834
-15.0 -3.9625
-10.0 -2.6417
-5.0 -1.3209
0.0 0.0000
5.0 1.3209
10.0 2.6417
15.0 3.9625
20.0 5.2834
25.0 6.6042
26.0 6.8652

To use this chart, find the liter value on the left column and read across to see the equivalent gallons in the right column. Negative values represent volumes below zero, which could be hypothetical or used in calculations involving volume changes.

Related Conversion Questions

  • How many gallons are there in 1 liter exactly?
  • What is the gallon equivalent of 1 liter in US measurements?
  • Is 1 liter more or less than 1 gallon?
  • How to convert 1 liter into gallons using a calculator?
  • What’s the difference between liters and gallons for 1 unit?
  • Can 1 liter be expressed as a fraction of a gallon?
  • Why does 1 liter not equal 1 gallon?

Conversion Definitions

Liter (l): A liter is a unit of volume in the metric system, equal to the volume of a cube that measures 10 centimeters on each side. It is widely used to measure liquids and gases, and it equals exactly 1,000 cubic centimeters or one cubic decimeter.

Gallons (gal): A gallon is a unit of volume used in the United States customary and imperial systems. The US liquid gallon equals exactly 3.78541 liters, and it is commonly used for measuring fuel, milk, and other liquids in the US and some other countries.

Conversion FAQs

Can the gallon conversion vary depending on the country?

Yes, gallons differ between the US and the UK. The US liquid gallon is 3.78541 liters, while the UK (imperial) gallon is about 4.54609 liters. The conversion given here uses the US gallon, which is more common in conversions involving liters.

Why is converting liters to gallons not a simple 1-to-1 ratio?

Liters and gallons are based on different measurement systems, metric and customary respectively, with different base units and sizes. Since the gallon is larger, the conversion divides liters by about 3.785 to get gallons.

Is the conversion factor exact or approximate?

The conversion factor 3.78541 liters per gallon is exact for the US liquid gallon definition. This number is standardized and used in scientific and commercial applications.

Can I convert gallons back to liters easily?

Yes, to convert gallons to liters multiply the gallons by 3.78541. This is the inverse operation of dividing liters by gallons.

Does temperature affect the volume conversion between liters and gallons?

Volume measurements can be affected by temperature changes because liquids expand or contract. However, the conversion factor itself stays constant, assuming standard temperature and pressure conditions.