I want to know the unit in which The Signal is calculated. Is it in dBM ? Usually I see the dBM values are in -. What would the - and + values signify in dBM ? Also more the value is positive, does it mean more Signal Strength ? i.e would a value of 42 mean higher signal strength than a value 37 ?

 # nmcli dev wifi

*  SSID                              MODE   CHAN  RATE       SIGNAL  BARS  SECURITY 
*  nixcraft                          Infra  149   54 Mbit/s  42      ▂▄__  WPA2     
   tfarcxin                          Infra  7     54 Mbit/s  37      ▂▄__  WPA2    

1 Answer 1


SIGNAL value is a percentage.

Maximum signal value is 100. You can test this by getting closer to the router.

If you want the output in dBm, use iwlist.

In this case, "-25" is better that "-50".

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