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Motor Pie for iOS

Developer's Description

Motor calculations made easy!

As with all our apps this app provides the underlying maths and theory behind the calculations together with worked examples. This will allow you to not just get an answer, but more more importantly to understand how the answer was derived.

This app is written to allow you to undertake ac electric motor calculations with ease. The following two features are available within the app:


This feature provides the following four tools:

Speed RPM: Upon entering a motors supply frequency, number of poles, and percentage slip if applicable, the motors synchronous speed and slip speed in RPM is calculated.

Output Power: Upon entering a motors phase or line voltage, current, power factor, and efficiency the the motors mechanical output power in kW and horsepower HP is calculated.

Torque: Upon entering a motors shaft power and shaft speed the motors torque in Nm and foot-pounds (lbfft) is calculated.

Speed Rads/s: Upon entering a motors shaft speed the motors angular speed in Radians per second is calculated.

Horse Power to kW Converter: Upon entering a Horse Power output power, the app calculates the corresponding kWm output power. By toggling the input value the reverse can also be calculated.


This feature provides the following two tools:

Full Load Current: Upon entering a motors mechanical power rating together with its phase or line voltage, power factor, and efficiency the motors full load current current (Amps) is calculated.

Input Power: Upon entering a motors mechanical power rating together with its power factor and efficiency the motors electrical input power in kW and kVA is calculated.

Written by Engineers for Engineers

About Pork Pie Software:

Pork Pie Software is a mobile app development company based in New Zealand. Our apps are actually written and coded by real engineers that practice in the engineering area that each app is written in.

All feedback and suggestions are genuinely welcome. As we write our own apps we can quickly update and improve our apps based on your feedback.

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Full Specifications

What's new in version 1.7


Release August 26, 2020
Date Added August 26, 2020
Version 1.7

Operating Systems

Operating Systems iOS
Additional Requirements Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.


Total Downloads 0
Downloads Last Week 0
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