Electrical Calculations9.2.0 - App Store

Electrical Calculations is the PROFESSIONAL app for those who work with electrical systems every day: design, size and verify in just seconds, from the job site or the office. Over 200 calculations, diagrams, formulas and tables in a single app, with clear, printable PDF reports to attach to your documents.

Designed for electricians, installers, designers and surveyors, it saves you time and helps you avoid mistakes: from cable sizing to short circuit.

COMPLIANT WITH STANDARDS
Reliable results aligned with the main standards: IEC (International Electrotechnical Commission), CEI (Italian Electrotechnical Committee), NEC (National Electrical Code), CEC (Canadian Electrical Code).

WHY CHOOSE IT
SAVE TIME: the calculations you'd do by hand, instantly available here.
AVOID ERRORS: verified formulas and up-to-date regulatory parameters.
PROFESSIONAL REPORTS: PDF reports ready for printing and archiving.
ALWAYS WITH YOU: over 200 tools including calculations, converters, tables and pinouts.
THE MOST USED CALCULATIONS
Cable sizing and coordination with the protective device, voltage drop, operating current, current intensity, voltage and power (active, reactive, apparent). Power factor and power factor correction. Current capacity of conductors and busbars, sizing of conduits and trunking, maximum cable length.

SHORT CIRCUIT AND PROTECTION
Short-circuit current at a point on the line, earthing system and coordination with the residual current device, cable protection against short circuit (K²S²), power loss, cable temperature, neutral current.

ELECTRIC MOTOR
Motor current, power, voltage, efficiency and power factor, slip, speed, maximum torque and full-load current. Three-phase motor connection diagrams, terminal markings. Three-phase to single-phase.

ELECTRONICS
Color and alphanumeric codes for resistors, capacitors and inductors, SMD code, LED resistor, voltage and current divider, Zener diode, battery life, resonant frequency, fuses and transformers.

CONVERSIONS
Delta-star, AWG, SWG, cross-section, length, energy, temperature, pressure, Ah/kWh, var/µF, Gauss/Tesla, RPM and many more.

RESOURCES AND TABLES
Tripping curves, cable reactance and resistivity, cable dimensions and weight, distribution systems (TT, TN, IT), IP/IK/NEMA protection ratings, ATEX marking, insulation classes, electrical symbols, ANSI device codes, plugs and sockets, IEC 60309, NEMA and EV charging connectors, SI prefixes and units of measurement, thermistors and thermocouples.

PINOUTS
Ethernet RJ-45, Ethernet with PoE, USB, HDMI, VGA, DVI, RS-232, FireWire, SATA, DisplayPort, Apple Lightning, Raspberry Pi, OBD II, XLR audio/DMX, MIDI, Jack, RCA, Thunderbolt, SD Card, SIM Card and LED.
Stop searching everywhere for formulas and tables: PUT YOUR ENTIRE ELECTRICAL LAB IN YOUR SMARTPHONE. Download Electrical Calculations and work faster, with standards-compliant results.
Terms of service (EULA): https://www.egalnetsoftwares.com/terms_of_service_app/

Version History * New: Analog signals with 0-5 V, 1-5 V and 2-10 V ranges
* New: Added type C and A thermocouples
* New: Added SI prefixes ronna, quetta, ronto and quecto
* Fix: In the IEC current-carrying capacity calculation, buried installations (D1/D2) now use the derating factors from tables B.52.18 and B.52.19
* Fix: CEI cable sizing and cable temperature for spaced single-core cables (installation methods 13–16)
* Fix: NEC and CEC calculations now apply the rules for grouped conductors, parallel conductors and small conductor protection
* Fix: Voltage drop with distributed loads in three-phase and two-phase (also in cable sizing)
* Fix: CEC cable-protection coordination: in free air the 70%/85% limit applies to conductors only (Rule 8-104)
* Fix: Design current: efficiency and voltage always applied
* Fix: Conduit and trunking sizing: CEC sizes from 500 kcmil now match the tables
* Fix: Minimum Isc and maximum length: B/C/D magnetic trip thresholds and parallel conductors
* Fix: Maximum cable length (ΔV): the cable type (single-core/multi-core) is now taken into account
* Fix: Correct resistor colors for 8.2 Ω and other standard values, and the standard values table no longer shows 8.19 Ω
* Fix: Motor calculations and design current: efficiency is no longer applied to power in VA and var
* Fix: Correct busbar ampacity with temperature rise above 30 °C and with painted bars wider than 50 mm
* Fix: Busbar ampacity: the suggested spacing is the bar thickness, with its unit of measure
* Fix: SMD resistor and capacitor codes: invalid codes now show an error instead of a wrong value
* Fix: Improved capacitor code decoding: voltages, tolerances and new formats
* Fix: Conversion accuracy
* Fix: Bare conductor ampacity: no crash when changing installation method (CEI) and correct temperature factors (NEC)
* Fix: Specific energy K²S²: correct IEC values for PVC above 300 mm²
* Fix: Parallel impedance: the correct value is now calculated
* Fix: Reactance: the capacitance calculation asks for the frequency again
* Fix: Power factor correction: correct capacitance when the capacitor rated voltage differs from the supply voltage
* Fix: Earthing system: mesh calculated from sides a and b
* Fix: Correct power losses with distributed loads
* Fix: Fuses: 4-band code per IEC 60127 and corrected data for Neozed, NH and automotive fuses
* Fix: LED resistor: in parallel the value is calculated for each LED as shown in the diagram
* Fix: Battery life: correct runtime with depth of discharge below 100%
* Fix: CCTV: storage and bandwidth in SI units (decimal GB/TB and Mbit/s), added AV1 and up to 60 fps
* Fix: Temperature sensors: corrected type K thermocouple voltage, PT/CU temperatures below 0 °C and entry of negative voltages
* Fix: Joule effect: time accepts decimals
* Fix: Single-phase motor run capacitor calculation
* Fix: Motor NEC FLC now matches the tables at 230/460 V and at 120/240/480 V system voltages
* Fix: AWG table up to 2000 kcmil, more accurate SWG diameters and corrected imperial/metric comparison
* Fix: Angle and RPM conversions: no more 60'' seconds, radius required for linear speed
* Fix: Corrected E192 standard values and Class G fuse voltage; added battery fuses (IEC 60269-7)
* Fix: Resistivity table: corrected nickel, zinc, constantan and nichrome values
* Fix: Cable dimensions and weight: wrong diameters and weights corrected
* Fix: Degree of protection: IP digit 0 is back (IP20, IP40…), IK01 = 0.14 J and NEMA → IP equivalents per NEMA 250
* Fix: ATEX marking: added current protection codes; ethanol in group IIB
* Fix: Correct names in CCTV resolutions
* Fix: Electricity around the world: removed obsolete 110/127 V networks and corrected the sockets of several countries
* Fix: C-Form sockets: correct voltages for 5-pin sockets and poles for 12h sockets
* Fix: NEMA connectors: three-phase series now shown (3Ø 250 V, 3ØY 120/208 V)
* Fix: Wiring color codes: IEC DC negative conductor is white (IEC 60445:2021)
* Fix: EV connectors: Tesla 9.2.0 1d ago * Mod: Improved license management
* Fix: Conduit filling ignored in "Conduit and cable tray sizing IEC/CEI"
* Mod: Improved some translations
* Fix: Focus does not select cell 9.1.2 Aug 24 * Mod: Updated images of sockets around the world
* Mod: Improved chatbot support and moved to a more visible position 9.1.1 Jul 20 * Mod: Native ads instead of interstitials
* Mod: Improved some results layouts
* Mod: Thorough review of translations
* Fix: Flowchart in the dark-themed section calculation formulas
* Fix: Crash in calculating the maximum cable length with AWG/kcmil size
* Fix: Dropdown with RTL languages
* Fix: Main view width with RTL languages
* Fix: Crash when selecting a calculation with an index that is no longer valid
* Fix: L- wire nomenclature (Morocco DC) 9.1.0 Jul 5 * ReFix: Crash in some converters
* Fix: Crash in "UL/CSA Fuse Ratings" on iPad 9.0.8 May 7 * Fix: Crash in some converters 9.0.7 May 6 * Mod: Differentiation between HP (Imperial Horsepower) and CV (Metric Horsepower)
* Fix: Selecting the type of installation in "Wire size with distributed loads (IEC)"
* Fix: Added flowchart to wire size calculation formulas
* Fix: Checking the ampacity when calculating the maximum cable length with voltage drop
* Mod: Improved TableView efficiency 9.0.6 May 5 * Mod: Improved calculation of the bars ampacity
* Mod: Improved IEC protection device selection when using fuses with rated current less than 16A
* Add: Guide on safe operating currents for circuit breakers and fuses
* Add: Support for IEC circuit breakers up to 6300
* Mod: Single power factor in settings
* Fix: Corrected the layout "size and weight" of NEC cables
* Upd: Arabic language (by Abd Al Aziz)
* Upd: General update of the languages 9.0.5 Mar 3 * Imp: The standard is automatically selected (when possible)
* Imp: Together with the type of installation, the type of cable (single-core / multi-core) is also shown
* Upd: Updated some external libraries
* Upd: Chatbot model updated to Gemini 2.5
* Upd: Russian language (by Djek-Energetik)
* Upd: Macedonian language (by Dragančo Velkov)
* Upd: General update of the languages 9.0.4 Jan 12 * Fix: Crash when selecting CEC standard in channel fill calculation 9.0.3 11/07/2025 * Mod: Improved data (size and weight) for CEI, IEC, and harmonized cables
* Mod: Channel fill calculation now fully supports the CEI standard
* Upd: Macedonian language (by Dragančo Velkov) 9.0.2 11/05/2025 * Upd: General update of the languages 9.0.1 09/30/2025 * Add: Full compatibility with iOS 26
* Fix: Updating of available wire sizes based on the type of installation when choosing the CEI protection device
* Fix: Fixed a crash when calculating voltage drop with distributed loads using a multicore cable
* Upd: Arabic language (by Majed Al-Shagdari)
* Upd: Russian language (by Djek-Energetik)
* Upd: Persian language (by Sajad Sahragard)
* Upd: General update of the languages 9.0.0 09/22/2025 * New: The app now supports CEI standards in addition to the international IEC ones
* New: Voltage drop calculation with equally distributed loads
* New: Wire size calculation with equally distributed loads
* New: Possibility to select 4 loaded conductors in the current carrying capacity calculation
* Mod: Improved ground resistance calculation
* Mod: Copper resistivity is now set to 0.01851 Ω*mm²/m for short-circuit current calculations
* Fix: Ads volume
* Upd: Macedonian language (by Dragančo Velkov)
* Upd: Arabic language (by Hamad Houcine and هزيم الرعد)
* Upd: Simplified Chinese language (by Jeven)
* Upd: Romanian language (by Pătrașcu Laurențiu) 8.0.0 09/15/2025 * Mod: Minor graphic improvements
* Upd: General update of the languages 7.5.2 07/15/2025 * Fix: Viewing the Tab Bar on iPad 7.5.1 06/24/2025 * New: Calculation of the maximum length of the cable protected from short-circuit
* New: Device acronyms
* Mod: The default load surcharge is now set to 0% to avoid oversizing the cable
* Fix: Settings row height
* Upd: Macedonian language (by Dragančo Velkov)
* Upd: Arabic language (by Majed Al-Shagdari) 7.5.0 06/23/2025 * Upd: The guide is now also translated into other languages 7.4.3 06/11/2025 * Fix: The conductor resistance calculation did not take frequency into account
* Upd: Updated some external libraries
* Upd: Tamil language (by Tamizharasan)
* Upd: Portuguese [BR] language (by Murillo Gumiero)
* Upd: Polish language (by Adamszopki)
* Upd: General update of the languages 7.4.2 05/26/2025 * 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
* Fix: Tripping curves with dark theme
* Upd: Arabic language (by Majed Al-Shagdari)
* Upd: Macedonian language (by Dragančo Velkov)
* Upd: Tamil language (by Tamizharasan)
* Upd: Portuguese [BR] language (by Murillo Gumiero)
* Upd: Hebrew language (by Arken)
* Upd: General update of the languages 7.4.1 05/05/2025 * New: Protection for emergency lighting lines 7.4.0 04/01/2025 * Fix: Fixed keyboard distance from safe area
* Mod: Improved guidance on full load current of motors (NEC) 7.3.1 03/18/2025 * Add: Ability to search for installation method by name or description
* Mod: Small improvements
* Mod: Bottom sheet
* Add: Support for floating keyboard
* Mod: Improved license captions
* Mod: Migration to Gemini 2.0 for chatbot
* Mod: The terms of service are more prominent
* Upd: Traditional Chinese language (by king)
* Upd: Macedonian language (by Dragančo Velkov)
* Upd: General update of the languages 7.3.0 03/10/2025 * Mod: Improved the calculation of the design current
* Upd: Updated some external libraries 7.2.3 01/08/2025 * Fix: Reduced neutral and protection conductors in parallel when exceeding 6000A (NEC and CEC)
* Fix: Displaying awg sizes in the picker
* Mod: Improved purchase management
* Upd: Simplified Chinese language (by wangwei)
* Upd: Macedonian language (by Dragančo Velkov) 7.2.2 12/09/2024