About Electrical Calculator
Electrical Calculator is your all-in-one app for fast, accurate, and essential electrical calculations. Packed with over 65 powerful tools, it’s designed for Electrical and Electronics Engineers, students, and...
Electrical Calculator is your all-in-one app for fast, accurate, and essential electrical calculations. Packed with over 65 powerful tools, it’s designed for Electrical and Electronics Engineers, students, and professionals. All calculators include built-in formulas and support both USCS and SI units. New Additions: . Resistor Color Code Calculators - Convert resistance to color bands and vice versa. . Upgraded Voltage Drop Calculations - Now fully aligned with NEC/IEEE standards. . Transformer Resistance Imbalance Core Calculators: . Voltage Calculator . Current Calculator . Resistance Calculator . Power Calculator . kVA to Amps (Single Phase) Electrical System Calculators: . Voltage Drop Calculator (updated per NEC/IEEE standards) . Wire Size Calculations (AWG & sq.mm) . kVA to Amps (Three Phase) . Amps to kVA (Single & Three Phase) . Power, Current & Horsepower (DC, Single & Three Phase) . Efficiency & Power Factor Calculators Reactance & Impedance: . Inductive Reactance . Capacitive Reactance . Resonant Frequency . Characteristic Impedance (Parallel & Coaxial) Series / Parallel Calculations: . Resistance, Inductance & Capacitance (Series & Parallel) . Unknown Resistance & Capacitance (Series & Parallel) . R and L / R and C / L and C in Series or Parallel . R, L, and C in Series or Parallel Lighting & Energy Tools: . Luminous Intensity, Luminous Flux & Solid Angle . Energy Cost Calculator . Energy Stored in Resistors, Inductors & Capacitors Conversions: . Star to Delta Conversion . Delta to Star Conversion Advanced Load Calculations: . Neutral Current (3-Phase Unbalanced Loads) . Inductor & Capacitor Sizing Formulas Electrical Converters: . Field Strength & Electrical Potential . Resistance, Resistivity, Conductance & Conductivity . Capacitance & Inductance . Charge Converters: Linear, Surface, and Volume Charge Density . Current Density Converters: Linear & Surface Current Density . Power Converter Key Features: . Flexible unit selection for inputs and outputs . Simple, clean interface for both students and professionals . Supports Dark Mode and multiple localizations
Version History • Fixed a bug that caused repeated update prompts. 11.1 Jan 20 • Added resistor color code calculators. • Updated voltage drop per NEC/IEEE standards. 11.0 10/30/2025 Regular update with improvements for a smoother experience. 10.6 07/28/2025 Added dark mode for better usability new calculations added : DC Electrical Generator Transformer Calculations 10.5 07/26/2024 - fixed an issue with the resistance calculator - other minor updates 10.4 04/26/2023 Now the Electrical Calculator App is compatible with Mac Computers. One purchase works on all devices , (iPhones , iPads and Mac ) 10.3.1 05/10/2022 - fixed an issue with French localization - added a new User Interface for Voltage Drop Calculator 9.4 02/07/2022 milliOhm ( mΩ ) conversion added to Resistance Converter. Electrical formulas are structured for better readability in all 62 calculators. 9.3 12/16/2021 - 8 more impedance calculators added to the App 9.2 07/07/2021 This app update brings performance enhancements and bug fixes. 9.0 03/05/2021 Quick fix to address an issue, where the unit selection was not functioning properly in devices running on iOS 12. 8.5.1 10/17/2020 Performance enhancements and bug fixes. New wire size of (sq.mm) added to voltage Drop Calculator. 8.5 10/07/2020 Two more calculations added: - Voltage Divider - RMS Voltage Calculations for sine wave, square wave, triangle wave, saw-tooth,half wave & full wave. 8.4 06/16/2020 - Fixed an issue where, in some cases, the electrical circuit diagrams were not visible. 8.3 05/08/2020 new calculations added : Transformer Calculator 8.0 02/07/2020 new calculators added to the App - Characteristic Impedance (parallel) Characteristic Impedance (coaxial) 7.0 08/31/2019 Voltage drop calculator comes with more units. 6.3 12/19/2018 - minor updations 6.2 06/01/2018 - an option to share the calculator screen has been added - voltage drop percentage has been added - all new user interface 6.1 05/31/2018 - ready for iPhone X 6.0 11/25/2017 - now available in Chinese(simplified) 5.6 09/15/2017 - voltage drop calculator has got SI standards for wire size - Electrical circuits are added to the App 5.5 05/30/2017 - "Voltage Drop Calculator" has been included to the already existing 48 Electrical Calculators. 5.4 02/07/2017 - ready for iOS 10 5.3 11/28/2016 kVA to amps and amps to kVA calculations are added new. Fixes made in input for efficiency for some HP Calculations. 5.1 09/10/2015
Previous Versions
Here you can find the changelog of Electrical Calculator since it was posted on our website on 2021-11-19 15:34:21.
The latest version is 11.1 and it was updated on 2026-06-24 10:04:21. See below the changes in each version.
Electrical Calculator version 11.1
Updated At: 2026-06-03
Changes: Version History • Fixed a bug that caused repeated update prompts. 11.1 Jan 20 • Added resistor color code calculators.
• Updated voltage drop per NEC/IEEE standards. 11.0 10/30/2025 Regular update with improvements for a smoother experience. 10.6 07/28/2025 Added dark mode for better usability
new calculations added :
DC Electrical Generator
Transformer Calculations 10.5 07/26/2024 - fixed an issue with the resistance calculator
- other minor updates 10.4 04/26/2023 Now the Electrical Calculator App is compatible with Mac Computers.
One purchase works on all devices , (iPhones , iPads and Mac ) 10.3.1 05/10/2022 - fixed an issue with French localization
- added a new User Interface for Voltage Drop Calculator 9.4 02/07/2022 milliOhm ( mΩ ) conversion added to Resistance Converter.
Electrical formulas are structured for better readability in all 62 calculators. 9.3 12/16/2021 - 8 more impedance calculators added to the App 9.2 07/07/2021 This app update brings performance enhancements and bug fixes. 9.0 03/05/2021 Quick fix to address an issue, where the unit selection was not functioning properly in devices running on iOS 12. 8.5.1 10/17/2020 Performance enhancements and bug fixes.
New wire size of (sq.mm) added to voltage Drop Calculator. 8.5 10/07/2020 Two more calculations added:
- Voltage Divider
- RMS Voltage Calculations for sine wave, square wave, triangle wave, saw-tooth,half wave & full wave. 8.4 06/16/2020 - Fixed an issue where, in some cases, the electrical circuit diagrams were not visible. 8.3 05/08/2020 new calculations added :
Transformer Calculator 8.0 02/07/2020 new calculators added to the App -
Characteristic Impedance (parallel)
Characteristic Impedance (coaxial) 7.0 08/31/2019 Voltage drop calculator comes with more units. 6.3 12/19/2018 - minor updations 6.2 06/01/2018 - an option to share the calculator screen has been added
- voltage drop percentage has been added
- all new user interface 6.1 05/31/2018 - ready for iPhone X 6.0 11/25/2017 - now available in Chinese(simplified) 5.6 09/15/2017 - voltage drop calculator has got SI standards for wire size
- Electrical circuits are added to the App 5.5 05/30/2017 - "Voltage Drop Calculator" has been included to the already existing 48 Electrical Calculators. 5.4 02/07/2017 - ready for iOS 10 5.3 11/28/2016 kVA to amps and amps to kVA calculations are added new.
Fixes made in input for efficiency for some HP Calculations. 5.1 09/10/2015
Electrical Calculator version 11.1
Updated At: 2026-01-20
Changes: • Fixed a bug that caused repeated update prompts.
Electrical Calculator version 1.2
Updated At: 2022-05-20
Changes: May 20, 2022 Version 1.2
Fixed an issue where in some cases, the App shows an update window very often.
Electrical Calculator version 1.1
Updated At: 2022-05-10
Changes: May 10, 2022 Version 1.1
- Fixed few errors.
Electrical Calculator version 9.4
Updated At: 2022-02-07
Changes: Feb 7, 2022 Version 9.4
- fixed an issue with French localization
- added a new User Interface for Voltage Drop Calculator
Electrical Calculator version 9.3
Updated At: 2021-12-16
Changes: Dec 16, 2021 Version 9.3
milliOhm ( mΩ ) conversion added to Resistance Converter.
Electrical formulas are structured for better readability in all 62 calculators.
Electrical Calculator version 9.2
Updated At: 2021-07-07
Changes: Jul 7, 2021 Version 9.2
- 8 more impedance calculators added to the App
Disclaimer
Official App Store Link
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