S DBW to S Meter Correlation Table

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The following table shows how S DBW (median signal power expected at the receiver input terminals) values can be mapped to S meter readings.

There are a few assumptions: the receiver input impedance is 50 Ohms and the transmission lineloss is minimal. Also we assume that the S meter is correctly calibrated. In practice, S meters are mostly imprecise and can only give relative readings.

S DBW	W (50 Ohm)	dBuV	microvolts	S Meter
-43.01	5.00E-05	93.98	50000.000	S9+60 dB
-53.01	5.00E-06	83.98	15811.388	S9+50 dB
-63.01	5.00E-07	73.98	5000.000	S9+40 dB
-73.01	5.00E-08	63.98	1581.139	S9+30 dB
-83.01	5.00E-09	53.98	500.000	S9+20 dB
-93.01	5.00E-10	43.98	158.114	S9+10 dB
-103.01	5.00E-11	33.98	50.000	S9
-109.03	1.25E-11	27.96	25.000	S8
-115.05	3.13E-12	21.94	12.500	S7
-121.07	7.81E-13	15.92	6.250	S6
-127.09	1.95E-13	9.90	3.125	S5
-133.11	4.88E-14	3.88	1.563	S4
-139.13	1.22E-14	-2.14	0.781	S3
-145.15	3.05E-15	-8.16	0.391	S2
-151.18	7.63E-16	-14.19	0.195	S1

Thank-you This table has been refined as per suggestions by Ahti OH2RZ.