iPhone Screenshots


CableCalc BS7671 for iPhone is a mobile version of our popular Windows CableCalc software.

This free app will calculate ring, radial and lighting circuits wired in twin and earth or 3 core and earth pvc cable up to 16mm. Calculations and checks include current carrying capacity, volt drop, correction factors, operating temperature, maximum Zs and minimum cpc size with a detailed summary.

CableCalc is a registered Trade Mark of Castline Systems.

What’s New

Version 1.1

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

Updated for BS7671 amendment 3, newer iOS versions.

Ratings and Reviews

5.0 out of 5
4 Ratings

4 Ratings

Sivoodoo ,

Excellent app

Does what it says. Very useful!

App Privacy

The developer, Castline Systems, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

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


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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