Noise Factor to Noise Figure Calculator

This tool converts Noise Factor (F) to Noise Figure (NF). 


	

			

		

						

				

				

                

			

			
						

		

		






 Noise Figure to Noise Factor





Formula





NF = 10*Log10(F)





Background





Noise factor (F) is defined as the degradation in Signal-to-Noise ratio due to a component in a signal chain [1]. 





F = SNRin/SNRout





Where SNRin and SNRout are the input and output Signal-to-noise ratios, respectively.





Since the SNR at the output of a component or subsystem is always lower than at the input, the Noise Factor F > 1. As a result, the Noise Figure is always a positive value. That is, NF > 0 dB.





What are the units of Noise Factor?





Noise factor is a ratio of Signal-to-noise and therefore it has no units. 





References





[1] Noise Figure article on Wikipedia