Unit Converter

1 U.S. MPG to British MPG

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1 U.S. MPG = 1.2009499255049 British MPG

U.S. MPG to British MPG Conversion Formula

British MPG = (Imperial Gallon × U.S. MPG) ÷ US Gallon
Imperial Gallon = 4.54609 Liters
US Gallon = 3.785411784 Liters

1 U.S. MPG to British MPG Conversion breakdown and explanation

So according to the formula above if we want to convert US Miles Per Gallon to British Miles Per Gallon we need to multiply US Milles Per Gallon by Imperial Gallon in Liters and divide the result by US Gallon in Liters.

With 1 US MPG we have: (4.54609 × 1) ÷ 3.785411784 = 4.54609 ÷ 3.785411784 = 1.2009499255049 British MPG

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