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Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin instantly

Enter Temperature

Results

Celsius (°C)
100
Fahrenheit (°F)
212
Kelvin (K)
373.15

Conversion Formulas

°F = (°C × 9/5) + 32
K = °C + 273.15
°C = (°F − 32) × 5/9
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How Temperature Conversion Works

Temperature is a measure of thermal energy. The three most common scales are Celsius, Fahrenheit, and Kelvin.

Celsius (°C)

Used worldwide for everyday temperature measurement. Water freezes at 0°C and boils at 100°C at standard atmospheric pressure.

Fahrenheit (°F)

Used primarily in the United States. Water freezes at 32°F and boils at 212°F.

Kelvin (K)

The SI unit of temperature used in science. Starts at absolute zero (−273.15°C). There are no negative Kelvin values.

Frequently Asked Questions

How do you convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5 and add 32. Formula: F = (C x 9/5) + 32. For example, 25°C = (25 x 1.8) + 32 = 77°F.
What is absolute zero?
Absolute zero is 0 Kelvin, which equals -273.15°C or -459.67°F. It is the lowest possible temperature where all molecular motion ceases.
What is the difference between Celsius and Kelvin?
Both have the same degree size, but Kelvin starts at absolute zero. To convert: K = °C + 273.15.
At what temperature are Celsius and Fahrenheit equal?
-40 degrees. At -40°C the Fahrenheit value is also -40°F.