Free Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin.
Enter a temperature and select the units. It applies the formulas F = C x 9/5 + 32 and K = C + 273.15, so offsets are handled correctly, not just a ratio.
How to use the Temperature Converter
- Enter your values, choosing the units you are working in.
- Read the result and the supporting numbers shown beneath it.
- Check the result against a second method or a reference table before you rely on it.
About the Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin.
Quick, reliable engineering arithmetic saves time on site and in the workshop. These tools show their working so you can check the result.
Getting started with the Temperature Converter
Using the temperature converter takes a minute or two. Your entries are saved in this browser, so you can come back later and carry on.
Tips for better results
Remember that temperature scales have different zero points, so you cannot convert by multiplying alone.
Keep units consistent from start to finish.
These tools are for estimates. Safety critical designs need a qualified engineer.
Privacy and where your data goes
Everything you type into the temperature converter stays on your own device. Zapxa does not receive your numbers or documents. If you clear your browser data, your saved entries will be removed, so download a PDF of anything you want to keep.
Frequently asked questions
What is the formula for Celsius to Fahrenheit?
Multiply the Celsius value by 9/5 and add 32.
At what temperature are Celsius and Fahrenheit equal?
At minus 40 degrees, both scales give the same number.
Is the temperature converter free?
Yes. It is free to use with no signup, no watermark and no usage limits.
Is my data private?
Yes. Your inputs are processed in your browser and saved only in its local storage. They are not uploaded to our servers.
Does it work on mobile?
Yes. Zapxa works on phones, tablets and desktops. Use the print button or download a PDF to keep a copy.
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