Temperature Converter
Convert temperature between Celsius, Fahrenheit and Kelvin. Free, fast and private.
Your result will appear here.
Enter a value to see the formula used.
How to use Temperature Converter
- Enter the temperature in the Amount box.
- Choose Celsius, Fahrenheit or Kelvin as the From unit, then the To unit.
- The result updates as you type — or press Convert. Use Swap to reverse the direction.
- Read the exact formula shown below the result — temperature is not a simple multiply factor.
- Press Copy Result to copy the answer.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. So 25 °C = 77 °F, and 0 °C = 32 °F.
How do I convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. So 77 °F = 25 °C, and 32 °F = 0 °C.
What is Kelvin and when do I use it?
Kelvin is the scientific temperature scale: K = °C + 273.15. Absolute zero is 0 K (−273.15 °C).
Is the Temperature Converter free?
Yes, it is 100% free with no sign-up. Your data stays in your browser.