US miles per gallon to imperial miles per gallon converter

Convert US miles per gallon to imperial miles per gallon in the Fuel economy family. See a sample calculation, unit definitions, and the interactive converter.

Example conversion: 10 mpg-us

12.00949927 imperial miles per gallon

This example is calculated from the same unit registry used by the interactive converter.

Formula and unit definitions

Compare miles per gallon and liters per 100 kilometers. Values are reciprocal, not linear.

Fuel economy uses a reciprocal relationship; the exact expression depends on the source and target unit.

Source unit: US miles per gallon (mpg-us), factor Special relationship, offset 0.

Target unit: imperial miles per gallon (mpg-uk), factor Special relationship, offset 0.

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Important note

The calculation is performed locally from the listed unit definitions. Display results are rounded for readability; high-precision and regulated work should use the governing standard and appropriate significant figures.

For high-precision, regulated or safety-critical use, check the underlying standard and its required precision. Historical and approximate units are identified in their names or family descriptions.

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