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Temperature Converter
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Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin with exact formulas and worked examples.
About this converter
Temperature conversion differs from most converters because scales do not share the same zero point. This page explains the offset-based formulas and when each scale is used.
The base unit for this converter is celsius, which lets us map each unit into one consistent formula layer before converting to the target unit.
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Available units
Celsius
deg CA temperature scale centered around water phase changes.
Also written as °C, C, degC, degree C, degrees C, degree Celsius, degrees Celsius, centigrade.
Fahrenheit
deg FA temperature scale still used heavily in the United States.
Also written as °F, F, degF, degree F, degrees F, degree Fahrenheit, degrees Fahrenheit.
Kelvin
KThe SI base scale for thermodynamic temperature.
Also written as kelvins.
Rankine
deg RAn absolute temperature scale using Fahrenheit-sized degrees.
Reaumur
deg rA historical temperature scale with water freezing at 0 and boiling at 80.
Triple point of water
TPWA reference temperature based on water's solid, liquid, and vapor equilibrium point.