Free FSPL Wi-Fi Coverage Calculator

FSPL Wi-Fi Coverage Calculator

FSPL, short of Free-space Path Loss, is the attenuation of radio energy between transmitter and receiver antennas. Below is the simple calculator of checking Wi-Fi range and signal strength base on the FSPL formula. You can select output power of Wi-Fi AP/Router/Booster, and select the antenna gain, then you will get the estimated signal strength in terms of theory.

The calculation is base on 2.4GHz Wi-Fi frequency. The 5.8GHz frequency will loss extra 6dB signal strength.

dBm to Watt Conversion Table

dBm Watts   dBm Watts   dBm Watts
0
1.0 mW
  16 40 mW   32 1.6 W
1
1.3 mW
  17 50 mW   33 2.0 W
2
1.6 mW
  18 63 mW   34 2.5 W
3
2.0 mW
  19 79 mW   35 3.2 W
4
2.5 mW
  20 100 mW   36 4.0 W
5
3.2 mW
  21 126 mW   37 5.0 W
6 4 mW   22 158 mW   38 6.3 W
7 5 mW   23 200 mW   39 8.0 W
8 6 mW   24 250 mW   40 10 W
9 8 mW   25 316 mW   41 13 W
10 10 mW   26 398 mW   42 16 W
11 13 mW   27 500 mW   43 20 W
12 16 mW   28 630 mW   44 25 W
13 20 mW   29 800 mW   45 32 W
14 25 mW   30 1.0 W   46 40 W
15 32 mW   31 1.3 W   47 50 W

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