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Home - RF/Microwave Calculators & Conversions - Power Density Calculator

Power Density Calculator

Pasternack's Power Density Calculator is designed to give the power density,  in Watts per square meter, at a given distance, output power and antenna gain. Please note that this calculator is only valid for far-field calculations.

Output Power:
Gain (linear):
Distance:

Result:
Power Density:

Power Density in radar applications, is typically described by the non-directional power density multiplied by the gain of the radar. Notice that the distance D is an exponential component to the equation, due to the three-dimensional "spreading" of the waveform as it propagates through space.

**Note: All of our calculators allow SI prefix input. For example, if you wish to input "25000000", just type "25M" instead. See the quick-reference table below for all compatible SI prefixes.
Prefix Symbol Value
Tera 'T' 1012
Giga 'G' 109
Mega 'M' 106
kilo 'k' 103
Prefix Symbol Value
pico 'p' 10-12
nano 'n' 10-9
micro 'u' 10-6
milli 'm' 10-3