The 'micro' EMF calculator allows you to construct a two dimensional model of a set of power lines and calculate the magnetic field produced by these lines at various lateral distances away.

You can calculate the electromagnetic field generated by up to 2 symmetrically or asymmetrically loaded 3-phase electrical power lines and cables (circuits). This can be expanded up to 30 3-phase circuits in a single model via an in-app purchase.

After an in-app purchase you can also calculate the induced current in nearby passive wires earthed at both ends (earth wires).

-- Define --
* Describe the geometry of the three phase circuits and earth wires, above or below ground.
* For each circuit, describe the electrical loading using active and reactive powers (or phase currents) and line voltage.
* Include a neutral wire or earth return in a circuit, with residual current automatically calculated.
* See a vector diagram showing magnitude and direction of each phase current.
* For each earth wire, describe the Geometric Mean Radius and DC resistance.

-- Calculate --
* Calculate the resultant field (in mG or µT, configurable via iOS app settings) using a power supply frequency of 50 Hz or 60Hz (configurable via iOS app settings).
* See a zoomable visual representation of the wire geometry.
* See a graph of the EMF (RMS) levels across your specified measurement band.

-- Manage and share --
* Email a model and its results (including as an attachment in csv format).
* Sync your models across all your iOS devices (iPhone and iPad) using iCloud.

What’s New

Version 1.3.3

[Bug fix] Earth wire induced current calculations updated.

App Privacy

The developer, Madhouse Development, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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