Free on-line temperature converter

The calculator can be used to convert the values between the most popular units that measure the temperature:

  • degrees Celsius (°C)
  • degrees Fahrenheit (°F)
  • Kelvin (K)

To obtain any of them, user needs to input the measuremet, choose the appropriate unit and choose the output unit.

Why do I get NaN as an output?

The value NaN (Not a Number) indicates that the input temperature is below the absolute zero, which is the lowest possible temperature to exist. The absolute zero equals to 0K (Kelvins).