How to use this calculator
Enter the requested values, review any options that affect the calculation, and select Calculate. The main answer appears beside the form, with supporting details below it.
How the calculation works
Celsius to Fahrenheit: °F = °C × 9/5 + 32. Kelvin uses the same interval as Celsius, with 0 K equal to −273.15°C.
Example
20°C equals 68°F.
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Frequently asked questions
Can I enter a temperature below absolute zero?
No. The calculator identifies values below 0 K as invalid.