US Gallon to Imperial Gallon (UK) Converter

This US gallon to Imperial gallon conversion tool is deigned to accurately calculate Imperial gallon from US gallon. This converter is reliable and completely free to use.

How a US gallon is different from an Imperial gallon

Both US gallon and Imperial gallon are units of volume measurements. However, they are different on the basis of historical definitions and regional prevalence. The US gallon is a popular volume unit in the United States whereas the imperial gallon is prevalently used in the United Kingdom and other European countries. 

1 US gallon is equivalent to 3.78541 liters (American spelling). Besides the USA, this unit is also used in many Latin American countries. The US gallon is further equivalent to 128 fluid ounces. If you convert 1 US gallon into cubic inches, the value will be 231 cubic inches. 

1 UK imperial gallon is equivalent to 4.54609 litre (British spelling) or 277.4194 cubic inches. Some of the commonwealth countries use this unit for volume measurement. The imperial gallon is further divided into 160 fluid ounces. The value of the imperial gallon is 20% larger than the US gallon. It means 1 imperial gallon is equivalent to 1.2 US gallon. 

The US gallon dates back to the early 1700s and is primarily used for measuring wine. However, the imperial gallon was introduced in 1824. It was earlier used to measure the volume of distilled water at a specific temperature.

How to use the US gallon to imperial gallon converter

• Step 1: Open any browser and search calculatormpg.co.uk . Then you need to navigate the US gallon to imperial gallon converter tool which will be in the header menu bar.
• Step 2: After you click and open our converter tool you need to enter the US gallon value in the input field. Then you just need to click the calculate button to see the result which will be in the Imperial gallon.
• Step 3: On the same page you can also find the UK imperial gallon to US gallon converter tool. You just need to put the value of the imperial gallon and click calculate to see the result in US gallons.

How to convert US gallon to Imperial gallon with formula

For Converting a US gallon to an imperial gallon we need to use this formula. 

Imperial gallon = US gallon * 0.832674 

For converting imperial gallons to US gallons you have to use the following formula, 

US gallon = imperial gallon * 1.20095 

For your better understanding, I am explaining this formula with an example. 

So, first of all, let us assume our vehicle is traveling from one place to another, and for that, we have taken 5 US gallons of fuel. Now, for converting US gallons into the UK imperial gallon we have calculated it step-by-step. 

Let us put the value first in the conversion formula for the desired answer. 

So, Imperial gallon = 5 * 0.832674 = 4.15

Imperial gallon = 4.1633 or 4.16 

Now, let us take another example to make the conversion formula clearer. 

Suppose, you are making a recipe and it requires water of 3 imperial gallons. 

Now, apply the conversion formula to convert it into the US gallon. 

So, US gallon = 3 * 1.20095 = 3.6 

US gallon to UK gallon conversion table

UK gallon to US gallon conversion table

Relationship between US gallons and Imperial gallons

In Graph 1, I have considered the X-axis AND Y-axis as Imperial gallons and US gallons respectively. The slope of the graph is upwards. It indicates that the increase in the number of imperial gallons is directly proportional to the increase in the number of US gallons.

In Graph 2, the X-axis and Y-axis represent US gallons and imperial gallons respectively. Like Graph 1, the line shows an upward slope but is steeper than Graph 1, indicating the value of the imperial gallon is larger than the US gallon.

Final Words

To conclude, the converter will help you switch between two volume units fast. You can avoid confusions at the time of purchasing fuel or filling up your fuel tank. So, use the converter confidently and stop thinking about any errors.