Temperature Converter Online Free
Type a temperature in Celsius, Fahrenheit or Kelvin and get all three conversions instantly.
Using This Temperature Converter Online Free
Temperature units cause constant confusion. Is 98.6F a fever? What is 37C in Kelvin? This temperature converter online free answers all three at once.
Enter a value, select the unit you are converting from, and all three outputs update instantly. The formula used is shown below each result.
Useful for cooking, science, medicine, weather and engineering. No account needed.
What this tool does
How to use it
Enter a value
Type the temperature number you want to convert.
Select the unit
Choose Celsius, Fahrenheit or Kelvin from the dropdown.
Read the results
All three converted values appear instantly below.
Questions About Temperature Converter Online Free
Results use the exact standard formulas (C to F: multiply by 9/5 then add 32). Accurate to 4 decimal places.
Absolute zero is 0 Kelvin, which equals minus 273.15 Celsius and minus 459.67 Fahrenheit.
Yes. Enter a negative number and the converter handles it correctly, including sub-zero Fahrenheit and Celsius values.
Normal body temperature is 37 Celsius, 98.6 Fahrenheit and 310.15 Kelvin.
Kelvin starts at absolute zero so there are no negative values. This makes it practical for thermodynamic calculations.