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Convert US mpg to Imperial mpg, Imperial mpg to US mpg - Fuel Economy Conversion

Use these online calculators to convert between US miles per gallon (US mpg) and Imperial miles per gallon (Imp mpg). These Fuel Economy conversion calculators provide a quick and easy way to convert:

  • US mpg to Imperial mpg
  • Imperial mpg to US mpg

Conversion Calculators

Enter your value in one of the conversion calculators below to convert US mpg to Imperial mpg or convert Imperial mpg to US mpg.

Convert US mpg to Imp mpg

Convert Imp mpg to US mpg

How to convert US mpg to Imp mpg: Use the conversion calculator on the left titled "Convert US mpg to Imp mpg". Enter a value in the US mpg field and click on the "Calculate Imp mpg" button. Your answer will appear in the Imp mpg field.

How to convert Imp mpg to US mpg: Use the conversion calculator on the right titled "Convert Imp mpg to US mpg". Enter a value in the Imp mpg field and click on the "Calculate US mpg" button. Your answer will appear in the US mpg field.

Conversion Definitions

The following is a list of definitions relating to conversions between US mpg and Imperial mpg.

What is US miles per gallon (US mpg)?

US miles per gallon is a unit of fuel economy in US Customary Units. US miles per gallon is calculated as the number of miles travelled per US gallon (not to be confused with Imperial gallon). The symbol for US miles per gallon is US mpg.

What is Imperial miles per gallon (Imp mpg)?

Imperial miles per gallon is a unit of fuel economy in the Imperial System. Imperial miles per gallon is calculated as the number of miles travelled per Imperial gallon (not to be confused with US gallon). The symbol for Imperial miles per gallon is Imp mpg.

Understanding the Fuel Economy Units

This table provides a summary of the Fuel Economy units within their respective measurement systems.

Unit Symbol Measurement System
US miles per gallon US mpg US Customary Units
Imperial miles per gallon Imp mpg Imperial System
Litres per 100 kilometers L/100km Metric System