The program Field Strength and Power Estimator calculates power flux density, electric and magnetic field strength from the transmitted power, associated frequency and gain of the transmitting antenna.
Additionally the input power into a receiver with 50 Ohm input impedance is calculated from the gain of the receiving antenna.
The program automatically converts power flux density into electric and magnetic field strength.
Depending on the transmitted frequency, various parameters influence the received power and field strength, such as non-line-of-sight propagation, changes in polarisation, reflections, and multi-path propagation affect the true values. Additionally antenna VSWR and cable losses have to be considered.

The program Field Strength and Power Estimator does not consider these impairments. It assumes conditions, that are close to the best possible theoretical values. This is why we say the program is an Estimator, not a Calculator.

This application is based on the application note:

"1MA85: Field Strength and Power Estimator"

by Rohde & Schwarz GmbH & Co. KG

( )

What’s New

Version 2.0

This app has been updated by Apple to display the Apple Watch app icon.

- new Look & Feel
- iPad support
- adaptive UI
- 64 Bit support

Ratings and Reviews

4.0 out of 5
3 Ratings

3 Ratings

RangerRick007 ,


This tool is exactly what’s needed to estimate RF field strength at various power levels, distances and antenna gains. It’s very helpful being able to directly convert between the relevant units like dBm, watts, uV/m, etc.

Superbly done. Thank you!!


App Privacy

The developer, Rohde & Schwarz GmbH & Co. KG, indicated that the app’s privacy practices may include handling of data as described below.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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