Noise Figure to Noise Temperature Calculator

This tool converts Noise Figure to Noise Temperature.

Enter the Noise Figure in dB and Reference Temperatures in either Celsius or Kelvin. Select the unit for Noise Temperature.

Noise Temperature to Noise Figure


TNoise = TRef *(10NF/10 – 1)

In the above, both TNoise and TRef are in Kelvin while NF is in dB.


Noise temperature is a measure of noise power introduced by a component or source. Noise figure on the other hand is a measure of the degradation in Signal-to-Noise ratio.

Example Calculation

The default value of TRef is the room temperature or 290 K. For a noise figure of 1 dB, TNoise is calculated to be 75.1 K.