Temperature converter
Convert Celsius, Fahrenheit, Kelvin and Rankine
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How to use it
- Enter your numbers.
- The result updates as you type.
- Change any value to see a different outcome.
Questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (1.8) and add 32. So 20 °C is 20 × 1.8 + 32 = 68 °F.
How do I convert Fahrenheit to Celsius?
Subtract 32 and multiply by 5/9. So 68 °F is (68 − 32) × 5/9 = 20 °C.
At what temperature are Celsius and Fahrenheit equal?
At −40. It is the one temperature that reads the same on both scales.
Is anything I enter stored?
No. Calculations happen in your browser and nothing you type is sent or saved.
Is it free?
Yes, you can use it for free. A subscription removes limits and unlocks premium tools.