Metric & Imperial Unit Converter

Whenever you’re reading about cars on the internet you tend to get a confusing mix of metric and imperial units, and sometimes that can result in some fairy misleading figures and comparisons.


Image credit: Ytsejam

Now must of us will know the difference between miles and kilometres (miles being the correct unit of measure, of course) but can you differentiate between Pferdestärken and kilowatts? What about Newton-Metres versus good old foot-pounds of torque?

If you’re not sure whether 300hp is better than 300PS (it is, by the way) then try using this handy metric/imperial unit converter. You’ve got all you need to convert between the three units for power (horsepower (hp), Pferdestärken (PS) and kilowatts (kW)), torque (pound-feet (lb-ft) and Newton metres (Nm)), speed (miles per hour or kilometres per hour) and liquids (gallons and litres).


Horsepower to Kilowatts HP Kw
Kilowatts to Horsepower Kw HP
PS to Kilowatts PS Kw
Kilowatts to PS Kw PS
PS to Horsepower PS HP
Horsepower to PS HP PS


Nm to lb/ft Nm lb/ft
lb/ft to Nm lb/ft Nm


MPH to Km/h MPH Km/h
Km/h to MPH Km/h MPH


Imperial Gallons To Litres Gallons litres
Litres To Imperial Gallons Litres Gallons


Pounds to Kilograms Pounds Kilograms
Kilograms To Pounds Kilograms Pounds

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Author: Chris Auty

Voted the Breakthrough Blogger of 2013 by SEAT and the Guild of Motoring Writers , Chris has lived and breathed cars since he was old enough to say 'faster'. With a penchant for hot hatches and an allergy to public transport, he would much prefer to drive a bad car than never drive at all. Fortunately his family has learned to put up with this obsession and the internet has provided a channel for his ramblings.

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