SI unit: kelvin (K)
Temperature Converter
Temperature measures thermal energy - how hot or cold something is. The SI unit is kelvin (K), with Celsius (°C) and Fahrenheit (°F) in common use.
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Reference Table
View a complete conversion table for celsius to fahrenheit.
View Reference Table →Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply Celsius by 9/5 and add 32. Formula: °F = (°C × 9/5) + 32. For example, 20°C equals 68°F.
What is the SI unit of temperature?
The SI base unit for temperature is kelvin (K), where absolute zero is 0 K (-273.15°C).
What is absolute zero?
Absolute zero is 0 K (-273.15°C or -459.67°F), the lowest theoretically possible temperature where all thermal motion ceases.