These converters change the unit on a figure you already have. They do not supply a missing length, power, or economy. Tyre placards and gauges often use psi, bar, or kPa, and the pressure page also reads kg/cm² and atmospheres. Engine power is listed as horsepower, kilowatts, or metric horsepower (PS). Torque is newton-metres or pound-feet. Fuel economy uses miles per gallon or litres per 100 kilometres, and it stays separate from electric efficiency, which uses kilowatt-hours per 100 kilometres and related units. Speed covers kilometres per hour and miles per hour. Length covers millimetres and inches for the body. Volume covers litres and gallons for boot and cargo space. Mass covers kilograms and pounds for kerb weight. Energy covers kilowatt-hours and megajoules. Temperature covers Celsius and Fahrenheit. Trip fuel, range, charge time, and battery energy are on the fuel and EV page.