Gallon Imperial to Gallon US Converter

1 Gallon Imperial = 1.20094992550485492967 Gallon US
Gallon Imperial (imp gal) ➜ Gallon US (US gal)
 
imp gal

Gallon Imperial vs Gallon US Comparison Chart

Source - Gallon ImperialTarget - Gallon US

Gallon Imperial (imp gal) - Definition and Overview

What is Gallon Imperial?

An Imperial Gallon is defined as 4.54609 liters or approximately 277.42 cubic inches. The Imperial gallon is primarily used in the United Kingdom and some other Commonwealth countries.

Summary

  • The Imperial gallon is a unit of volume that is commonly used in the United Kingdom and some other Commonwealth countries to measure the volume of liquids, such as gasoline, milk, and water
  • It is also used in the brewing and distilling industries to measure the volume of beer and spirits
  • The Imperial gallon is a convenient unit of volume because it is easy to convert to other units of volume, such as liters and cubic inches.

Gallon US (US gal) - Definition and Overview

What is Gallon US?

A US Gallon is defined as 231 cubic inches or approximately 3.78541 liters. The US gallon is used for measuring liquid volume in United States and some Latin American and Caribbean countries.

Summary

  • The US gallon is a unit of volume that is commonly used in the United States and some Latin American and Caribbean countries to measure the volume of liquids, such as gasoline, milk, and water
  • It is also used in the brewing and distilling industries to measure the volume of beer and spirits
  • The US gallon is a convenient unit of volume because it is easy to convert to other units of volume, such as liters and cubic inches.

How to Convert Gallon Imperial to Gallon US?

1 Gallon Imperial is equal to 1.20094992550485492967 Gallon US. To convert Gallon Imperial to Gallon US, use this simple formula:

Gallon US = Gallon Imperial x 1.20094992550485492967

So, just multiply the number of Gallon Imperial by 1.20094992550485492967 to get equivalent value in Gallon US.

Example 1:

Convert 5 Gallon Imperial to Gallon US
5 x 1.20094992550485492967 = 6.00474962752427464835 Gallon US

Example 2:

Convert 7.5 Gallon Imperial to Gallon US
7.5 x 1.20094992550485492967 = 9.007124441286411972525 Gallon US

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.

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