dBf to dBm Calculator

This tool converts from dBf (deciBel Femtowatt) to dBm (deciBel milliwatt) and Watt.


	

			

		

						

				

				

                

			

			
						

		

		






 dBm to dBf





Formula





dBm = dBf – 120





PdBf = 10*log10(PfW)





1 Femtowatt = 10-15 Watt





1 Watt = 1015 Femtowatt





Background





dBf is used to specify the sensitivity of Frequency Modulation (FM) Radio receivers. dBm is generally used for RF power measurements. 





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FM Receiver Sensitivity