Electrical Calculations

Contains adsIn-app purchases
4.8
46.3K reviews
1M+
Downloads
Content rating
PEGI 3
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About this app

Electrical Calculations is the best app in the electrical sector, it has many calculations that can help you in your work. It can not miss in your smartphone!

Main calculations:
Wire size, voltage drop, current, voltage, active / apparent / reactive power, power factor, resistance, Maximum wire length, Current carrying capacity of insulated conductors / bare conductors / busbar, Conduit fill, Sizing the circuit breaker, Admissible let-through energy of the cable (K²S²), Operating current, Reactance, Impedance, Power factor correction, Power factor correction of transformer MV/LV, Capacitor power at different voltage, Earthing system, Short circuit current, Conductor resistance, Calculation of the cable temperature, Power losses in cables, Temperature sensors (PT/NI/CU, NTC, Thermocouples…), Analog signal values, Joule effect, Fault current of strings, Risk assessment of overvoltages with atmospheric origin.

Electronic calculations:
Resistor / Inductor color code, Fuses, Sum resistors / capacitors, Resonant frequency, Voltage divider, Current divider, Zener diode as voltage stabiliser, Resistance to reduce voltage, Resistance for led, Battery life, Primary/Secondary winding of transformer, Antenna length, CCTV Harddrive/Bandwidth calculator.

Calculations concerning the motor:
Efficiency, Motor from three-phase to single-phase, Capacitor start motor single-phase, Motor speed, Motor slip, Maximum torque, Full-load current, Diagrams of the three-phase motor, Insulation class, Motor connections, Motor terminals marking.

Conversions:
Δ-Y, Power, AWG/mm²/SWG table, Imperial / metric conductor size comparison, Section, Length, Voltage (Amplitude), sin/cos/tan/φ, Energy, Temperature, Pressure, Ah/kWh, VAr/µF, Gauss/Tesla, RPM-rad/s-m/s, Frequency / Angular velocity, Torque, Byte, Angle.

Resources:
Fuses application categories, UL/CSA fuse class, Standard resistor values, Tripping curves, Table of cables reactance, Table of resistivity and conductivity, Table of unitary voltage drop, Dimensions and weight of cables, IP/IK/NEMA protection classes, Atex marking, Appliance classes, CCTV resolutions, Thermocouple colour codes and data, ANSI standard device numbers, Electrical symbols, Electricity around the world, Plug and socket types, IEC 60320 connectors, C-Form Sockets (IEC 60309), Nema connectors, EV charging plugs, Wiring color codes, SI Prefixes, Units of measurement, Pipes dimensions.

Pinouts:
Ethernet wiring (RJ-45), Ethernet with PoE, RJ-9/11/14/25/48, Scart, USB, HDMI, VGA, DVI, RS-232, FireWire (IEEE1394), Molex, Sata, Apple Lightning, Apple Dock Connector, DisplayPort, PS/2, Fiber optic color code, led, Raspberry PI, ISO 10487 (Car audio), OBD II, XLR (Audio/DMX), MIDI, Jack, RCA color coding, Thunderbolt, SD Card, Sim Card, Display LCD 16x2, IO-Link.

The app also contains a very useful form.
Updated on
5 May 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Financial info, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.8
44.9K reviews
Barry McArdle
2 August 2022
Just got the paid version. Good app but I thought for all that money that it would show you how it calculated its values as well as giving you an answer. Yes you can go off looking for the formulas. Especially when you print off your calculations. All it does is basically does a screenshot with input values and result. Does not show you how it got to the value through formulas so no evidence to back up your print out. Shame, think that is the only thing it's lacking. Maybe future update?
66 people found this review helpful
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D Baldwin
10 July 2023
This is a very good app. I've used it for years with no issues at all. It saves a TON of hassle on site. My only gripe is that while you used to be able to hid the pro key, with a recent Android change the pro key cannot be hidden anymore and sits in the app list next to the main app icon, which keeps things cluttered and is really annoying!
15 people found this review helpful
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Ettore Gallina
10 July 2023
Hi, regarding your problem we are sorry to inform you that from Android 13 it is no longer possible to hide the pro key, for everything else we thank you for your comment and review.
Pete Evans
14 October 2023
Cracking little App. I use this on a daily basis. Along with the basics it's got some nice little rarely used/seen info that has saved my bacon on more than one occasion. Nice modern look and easy to use. Regularly updated. I've tried a few different trade companion Apps of this type over the years, but this one is by far the best. I'd give it more stars if I could!
22 people found this review helpful
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Ettore Gallina
18 October 2023
Hello, thank you very much for your comment and review.

What's new

v10.4.1
* Mod: Improved unit voltage drop table
* Mod: Improved IEC cable reactance table
* Mod: Improved cable resistance/reactance/impedance calculation
* Mod: Improved images of tripping curves
* Mod: Improved and expanded IEC electrical symbols
* Upd: Arabic language
* Upd: Macedonian language
* Upd: Tamil language
* Upd: Portuguese [BR] language
* Upd: Hebrew language
* Upd: General update of the languages