RF Power Density Calculator

RF Power Density Calculator

Calculate the RF power density using:
\[ S = \frac{P}{4\pi r^2} \] where \(P\) is the transmitted power (W) and \(r\) is the distance (m).

* Enter the power in watts and the distance from the source in meters.

Step 1: Enter Parameters

Example: 100 W

Example: 10 m

Derived Formula: \( S = \frac{P}{4\pi r^2} \)


Practical Example:
For a power \( P = 100\,\text{W} \) and a distance \( r = 10\,\text{m} \):
\( S \approx \frac{100}{4\pi \times 10^2} \approx \frac{100}{1256.64} \approx 0.0796\,\text{W/m}^2 \).