Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin using standard temperature formulas.

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Temperature Formulas

°C to °F
(°C × 9/5) + 32
°F to °C
(°F − 32) × 5/9
°C to Kelvin
°C + 273.15
Kelvin to °C
K − 273.15

Key Temperature Points

Description °C °F K
Absolute zero−273.15−459.670
Water freezes032273.15
Room temperature2068293.15
Body temperature3798.6310.15
Water boils100212373.15

FAQ

−40 degrees is the same in both Celsius and Fahrenheit. This is the only point where the two scales intersect.
Absolute zero (0 K, −273.15°C, −459.67°F) is the lowest possible temperature where all molecular motion stops. It is the starting point of the Kelvin scale.

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Quick Tip

A quick mental shortcut: to roughly convert °C to °F, double the Celsius value and add 30.