# gallons to liters

This converter makes instant conversions from US fluid gallons (gal) to liters (l). It also provides the conversion steps. To use the converter, please provide a value in the input field. The converter will begin making conversions as the values are being typed in.

### How many liters in a gallon?

Liter (l) is a unit of volume in the International System of Units (SI). Gallon (gal) is a unit of volume in the United States (US) customary system as well as in a few other systems of measurements. However, the sizes of the gallons are different in these measurement systems. The US customary system is still widely used in few counties today. In the US customary systems, a gallon is defined to have 3.785411784 liters exactly. Based on this definition, there are 3.785411784 liters in a gallon.

### How to convert gallons to liters

Based on the definition of 1 gallon being exactly 3.785411784 liters in the US customary system, the gallon to liter conversion formula is:

liter = 3.785411784 × gallon

Thus, to convert from gallons to liters, multiply a value in gallons by 3.785411784. For example, convert the volume of 5 gallons of water to liters:

5 gal = 5 × 3.785411784 l = 18.927 l