Unit Converter › Temperature
offset scale · base kelvin
Temperature converter
Celsius, Fahrenheit, kelvin and Rankine. 4 units, every one shown at once.
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offset scale · base kelvin
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why temperature is different
Every other category is one multiplication. Temperature scales start at different zero points, so they need an offset as well — which is why doubling °C does not double °F.
Other categories
Mass
Kilograms, pounds, stone, ounces and both tons.
Length
Metric, imperial, and the nautical mile.
Volume
Litres, and US and Imperial measures kept apart.
Speed
km/h, mph, knots and metres per second.
Energy
Joules, calories, watt-hours and BTU.
Area
Square metres, feet, acres and hectares.
Time
Seconds through years, with the year defined.
Data
Decimal MB and binary MiB, kept apart.
Data rate
Megabits per second versus megabytes per second.
Pressure
Bar, psi, atmospheres and millimetres of mercury.
Power
Watts, and the two different horsepowers.
Angle
Degrees, radians, gradians and turns.
Frequency
Hertz, kilohertz, megahertz and RPM.
Force
Newtons, kilogram-force and pounds-force.
Torque
Newton-metres and pound-feet.
Fuel economy
mpg and L/100 km — where bigger means worse.
Density
kg/m³, g/cm³ and pounds per cubic foot.
Cooking
Spoons and cups, with the country stated.
Illuminance
Lux and foot-candles.