The electrical app for electricians or anyone involved within the electrical industry. Electrical tools, tables, charts and calculators.

The Electrician's app for electricians, electrical engineers and anyone working within the electrical industry. This Electrical Tools and Reference App is packed full of printable electrical charts & tables, multiple electrical calculators, electrical tools and guides.

Electrical Tools and Reference is a great addition to your toolkit enabling the instant lookup of cable rating charts, EICR next inspection (frequency of inspections) charts or to look up a Zs value or carry out a quick volt drop calculation.

This electrical app is full of charts, tables calculators and electrical tools and electrical formulator calculators designed to assist with the day to day requirements of electricians.

- Direct call to the local DNO
- Easy to navigate sidebar menu
- Print electrical charts
- Print MCCB max Zs tables
- Save and print your own notes
- Regularly maintained
- Dedicated support team

Watts amps volts calculator:
- Single phase convert to or from Watts, Volts & Amps
- Three phase convert to or from kW, volts, amps &
power factor

kVA calculator:
- Single phase convert to or from kVA, volts, & amps
- Three phase convert to or from kVA, volts, & amps
- kVA-PF-kW calculate to or from kVA, power factor &

Max Zs Values (18th Edition):
- Common BS EN devices
- Some 60947-2 MCCB manufacture Zs value charts
- RCD's in TT earthing systems max Zs values
- Max REC Ze values
- Uo 55v (110V) single & three phase 63.5v Zs values
- Calculate to or from Ze + R1+R2 = Zs

Earthing & Bonding:
- Main earthing & bonding size calculator
- Circuit cpc (earth) size calculator
- Adiabatic Equation

Other Electrical Calculators:
- Ring final circuits r1+r2 to R1+R2 converter
- PFC fault current calculator
- Cable size calculator
- Volt drop calculator
- Line conductor to cpc ratio calculator
- Calculates the expected ring circuit r2+r2 from the
r1+r1 value
+ Many more...

Printable charts and tables.
- Bathroom zones
- IP ratings of equipment in bathrooms
- Cable rating charts
- Cable resistance per meter chart
- CPC ratio chart for ring final circuits
- EICR frequency of inspections
- IP codes and the level of protection offered for each
code chart

RCD trip times charts:
- BS EN 61008-1 & 61009.-1
- BS 4293 & 7288

SPD surge protection charts:
- SPD types and their applications

- SWA steel armour copper equivalent size chart
- SWA cleat selection chart
- SWA gland selection chart
- Safe wiring zones
- Types of wiring (wiring codes for electrical
- Cable installation method codes (for electrical
- BS 5308 part 1 + 2 and ENATS 09-06 cable colour codes
- RJ45 connection guide colour codes
- Telephone point connection guide colour codes
- Harmonised wiring colours table (old to new)
+ Many more...

Electrical software for the electrical installer, maintenance engineer, installation electrician or electrical testing & inspection engineer.

You may also like our Electrical Certification Software "Pro Certs" for iPad.

Contact our dedicated support team at to offer improvement suggestions or request new features.

Check out our full collection of electrical apps in the app store or at

What’s New

Version 10.42.6

Added an Ohm's Law calculator, updated RCD & SPD tables and some optimizations.

Ratings and Reviews

4.2 out of 5
29 Ratings

29 Ratings

sparky hero ,

Good app

Good app worth getting still a few bugs with the single cable calculator but much better than it was much better than its competitors

Developer Response ,

Thank you for your feedback. We have fixed the bugs you report above in our new version 10.4 released on 2nd Jan 2019. We have also added a print feature to the electrical charts. Feel free to email us at for any further improvement suggestions.

Shaan1991 ,

10/10 App

I never ever ever leave reviews. But with this app I make an exception. This app is easily THE MOST USEFUL app I have ever owned. I use it daily and it has absolutely everything in one convenient place. If you are discouraged by the price let me tell you… if it was £50 I would pay for it just because of how useful it is. Amazing app and we’ll worth a purchase!

Developer Response ,

Thank you for your feedback, it’s nice to hear after the amount of work we have and continue to put in to this app.

JH361986 ,

Information at your fingertips

Had this app for sometime now and really recommend it for any electrician, engineer, trainee and designer. It provides a great level of information at the touch of a button and prevents having to carry reference books out on site.

App Privacy

The developer, Pro Certs Software Ltd, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

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


  • Family Sharing

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

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