Convert Celsius, Fahrenheit and Kelvin
Enter a temperature, choose its scale and the scale you need, and the result appears at once. The same temperature is also shown in the other scales, with a quick table for common values — for weather forecasts, cooking, science and travel.
Temperature scales have different zero points, so they are converted with formulas rather than a simple factor: °F = °C × 9/5 + 32 and K = °C + 273.15. Everything is calculated in your browser.
Why Use This Temperature Converter?
- Celsius, Fahrenheit, Kelvin and Rankine
- Result as you type, negative values included
- The temperature in all scales at once, plus a quick table
- Exact conversion formulas
How to Convert Temperature
- Type the temperature you want to convert
- Choose the scales in the "From" and "To" lists
- Read the result or copy it with one click
Frequently Asked Questions
Is this temperature converter free?
Yes, it is completely free and has no limits.
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (1.8) and add 32. For example, 20 °C × 1.8 + 32 = 68 °F. To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9.
At what temperature are Celsius and Fahrenheit equal?
At −40: −40 °C is exactly −40 °F. Water freezes at 0 °C (32 °F) and boils at 100 °C (212 °F) at sea level, and absolute zero is 0 K, which is −273.15 °C.
Is any data sent to a server?
No. All conversions are calculated in your browser.