hp to kW converter: power and torque
hp, kW and PS/CV; N·m and lb-ft; power from torque and rpm.
MPH to KPH, MPG and EV efficiency converter
Convert speed, fuel consumption and electric efficiency between the units used in the US, the UK and Europe, all at once.
Result
Definitions used
- 1 international mile = 1.609344 km (exact).
- 1 US gallon = 3.785411784 L; 1 imperial (UK) gallon = 4.54609 L (exact). That is why the same car shows a higher mpg figure in the UK than in the US.
- L/100 km and mpg are reciprocal: L/100 km = 235.215 / mpg (US) = 282.481 / mpg (UK).
Worked example: 40 mpg (US) = 5.88 L/100 km = 48.0 mpg (UK) = 17.0 km/L.
Limitations
- These are exact unit conversions. They do not convert between test cycles (EPA, WLTP, NEDC), which give different figures for the same car.
Sources
- NIST Special Publication 811, conversion factors for the mile and the US gallon; UK Weights and Measures Act 1985 for the imperial gallon.
Want to know what a trip costs? Try the fuel cost calculator.
More tools
Engine displacement and compression ratio
Displacement from bore and stroke; compression ratio and chamber volume.
Petrol vs diesel vs hybrid vs electric: cost calculator
Total cost of ownership with your mileage and today’s prices. Shows when a pricier car pays back.
Diesel vs petrol calculator
Which one is cheaper for your mileage, and from how many km a year diesel pays off.
EV vs hybrid calculator
Total cost of an electric car against a hybrid with your charging situation.
Hybrid vs plug-in hybrid calculator
When a plug-in pays off: it depends on how often you charge it.