Wifi Range Calculator
Also calculates "Free Space Loss" "Fresnel Zones" "System Performance" and "milliWatts to dBm (and vice versa)"Calculating your 802.11 power output.
Use this calculator to walk through all the factors that make up your Total Power Output. The Total Power Output is the the total power being output from your wireless system and is the sum of:
* Radio Transmit Power
* -Less - cables and connectors losses
* Antenna gain