Noise Temperature to Noise Figure Calculator

This tool converts Noise Temperature to Noise Figure.

Enter the Noise and Reference Temperatures along with appropriate units – Celsius or Kelvin.

Noise Figure to Noise Temperature


Noise Figure (dB) = 10*Log10(TNoise/TRef + 1)


Noise temperature is a measure of noise power introduced by a component or source.

Example Calculation

The default value of Tref is the room temperature or 290 K. If the noise temperature measurement of a Low Noise Amplifier is 82 K, then its noise figure is calculated to be 1.08 dB.


Noise figure is used to determine the sensitivity of a radio receiver. This number in addition to others impacts the range of a radio system.