Use this calculator to convert Power in dBm to E-field strength in volt-per-meter (V/m).
The signal at the output connector of a transmitter is expressed in Volt or dBm. The field intensity at any distance away from the transmitter is expressed in terms of V/m.
Enter
- Output power in either dBm or Watt
- Antenna gain (dBi) and
- Distance from the transmitter (meters)
Formula
Field Strength (V/m) = √(30*Pwatt*10(GaindBi/10))/Distance