Temperature conversion
Convert Celsius to Fahrenheit and back
Weather, cooking, and travel all mix Celsius and Fahrenheit. The temperature converter converts between C and F instantly, including Kelvin for scientific work.
The fast workflow
Follow the same short workflow every time so the result is predictable.
Enter the temperature
Type the value in either unit.
Choose the direction
Select C to F or F to C.
Read the result
The converted temperature appears instantly.
Check the table
Compare the value across Celsius, Fahrenheit, and Kelvin.
Anchor points to sanity-check results
Water freezes at 0 C (32 F) and boils at 100 C (212 F), and body temperature is about 37 C (98.6 F). Any conversion that contradicts these anchors is a sign of a mistake.
For cooking conversions, pair the temperature converter with the volume converter for cups, tablespoons, and milliliters.
Common problems
- Guessing with the wrong formula and being off by 30 degrees
- Rounding the result for oven temperatures
- Mixing Celsius and Fahrenheit in one recipe
Best practices
- Use the exact formula: F = C x 9/5 + 32
- For ovens, round to the nearest 5 degrees
- Check the table for common values such as 0 C and 100 C
Frequently asked questions
What is the formula for Celsius to Fahrenheit?
Multiply by 9, divide by 5, then add 32. The converter does this exactly and instantly.
At what temperature are C and F equal?
The two scales meet at -40 degrees: -40 C equals -40 F.
Can I convert Kelvin?
Yes. The converter includes Kelvin for scientific and engineering work.
Is my value uploaded?
No. Conversion runs locally in your browser.
Your data stays local
Everything runs in your browser. Files and values are never uploaded or stored.
Open Temperature Converter