Electrical Formulator6.0 - App Store
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Publisher Description
Electrical Formulator: Your Complete Electrical Calculation Tool
Solve virtually any electrical design or engineering challenge with this powerful and intuitive electrical formulator. Packed with hundreds of conversion and calculation tools, it’s the most versatile utility in your toolkit. Save, print, or email your results. Easily access your most-used and recently used formulas. Every calculation is automatically saved for future reference.
Key Features:
. Instant access to over 100 professional-grade electrical formulas
. Save and organize your results for later reference
. Share results via email or print
. Highlights your most-used and recent formulas
. Designed for engineers, electricians, and energy professionals
Formula Categories:
Batteries
. Starting motor amperage
. Number of cells required
. Estimated operating time
Cost Calculations
. Appliance and lighting energy usage
. Estimated usage hours for new bulbs
. Insulation payback period
BTU Conversions
. BTU to joules, horsepower-hr, watt-hr, calories, foot-pounds, and more
Generator Calculations
. DC generator output
. Generator amperage and efficiency
Impedance & Reactance
. Resistance & reactance combinations
. Inductive and capacitive reactance
. Total impedance and parallel circuits
Kilowatts & Joules
. Convert kilowatts to BTU/hr, joules/sec, lumens, horsepower, megajoules/hr, and more
Motors
. Single- and three-phase motor calculations
. Locked rotor current
. Motor kVA (including multiple input scenarios)
. Motor speed analysis
Ohm’s Law
. Calculate for power, voltage, resistance, or current
Transformers
. Primary and secondary amperage
. Full-load transformer sizing (208V, 240V, 480V for single and three-phase)
. Impedance and amperage capacity calculations
Voltage Drop
. Copper and aluminum wire voltage drop (1-phase and 3-phase)
. US/Imperial and metric units supported
Wiring & Conduits
. Wire size and resistance (copper and aluminum)
. Wire length calculations
. Conduit sizing
Whether you’re working in the field, the lab, or the classroom, this electrical formulator helps you work faster, smarter, and with confidence.
Users are able to calculate twelve formulas for FREE. Purchase a subscription to calculate additional formulas. All subscriptions come with a 1-WEEK FREE TRIAL and SUPPORT Family Sharing.
Version History Completely rewritten from scratch. New interface, ability to save multiple results, and ability to export results. 6.0 06/09/2025 Pro Bug Fix 5.0.1 07/07/2016 Totally redone code. Basis for future growth. Redone UI. Ability to see underlying formulas if you unlock pro version 5.0 06/27/2016 new charts 4.2.5 05/10/2013 New Formula, small bug fixes 4.2 03/25/2013 Electrical Charts, Links to download the latest Electrical Codes by State 4.1 01/04/2013 bug fix 4.0.2 12/06/2012 Critical Bug Fix 4.0.1 10/09/2012 iPhone 5 Support 4.0 09/26/2012 Over 35 new formulas in the voltage drop, bug fixes 3.9 09/12/2012 New Motor Formulas. Support for iPad Retina 3.8 04/23/2012 iOS 5 Compatibility 3.7 10/12/2011 New Section with Power Demand formulas and charts 3.6 08/23/2011 New Interface, Support for E Printing 400 new metric conversion formulas 3.5 06/05/2011 Added additional metric formulas plus wring chart for EU, GB, Canada and Australia 3.2 04/20/2011 New UPS calculations, Fixed Saved Calculation sync on iphone, formula tweeks 3.1 03/15/2011 Critical upgrade to prevent crash on upgrades only 3.01 11/08/2010 IF your iphone crashes on starting after upgrade delete the app and redownload a new version is on the way. iPad Native, new transformer formulas, totally redone conversion sections with over 100 new formulas. New area formulas 3.0 10/27/2010 10 New Power Factor Conversions
fractions to decimals and metric
New Wring Calculation 2.9 05/03/2010 Six new formulas
AWG inputs for Conduit Size
Conduit Offset formula
4 Motor Pulley Formulas 2.8 02/11/2010 Section in Lighting that includes:Lighting Loads for both Metric and Imperial, Hours of Usage, Number of Fittings, Room Index,
Two new transformer formulas for secondary windings
New Conversion Square Measures Metric Conversion
In² to cent², Ft² to Mt²Acres to Hectors Acres to Square Kilometers and reverse of the above
Cubic conversion: Cubic Inches to Cubic Centimeters, Cubic Feet to Cubic Meters and Cubic Yards to Cubic Meters and the reverse of the above. 2.7 12/20/2009 Four new formulas for Voltage Drop that allow entry of voltage drop in AWG
Four new formulas in Voltage Drop that allow entry in Millimeters
600 Volt Transformer Formula 2.6 11/05/2009 45 Area Formulas on Rectangles, Pyramids,Squares,Cylinders,Circles, Cones, Ellipses and Parallelograms.
Six formulas in Direct-Current Permanent Motors.
Bug Correction in Kilometers and Kilo conversions.
Bug Fix for certain regions and decimal point entry. 2.5 09/29/2009 New Motor Calculations for:
Full Load Torque
Starting Time
Energy to Overcome Inertia
Full Load Speed
Conversion from G to ft sec and back
Bug Fix In Recent
Better E-mail to support 2.4 08/19/2009 Two Phase Four Wire Calculations for Amperes when HP is known, KW is known, KVA is known, Kilowatts and Kilovolts as well as Horsepower. Additional Impedance Calculation when Resistance and Reactance are known as well whe Inductive Reactance and Capacitive REactance are known.
Conversion Section Reintroduced. 2.3 07/08/2009
About Electrical Formulator
The company that develops Electrical Formulator is Historycentral.com Inc. The latest version released by its developer is 6.0.
To install Electrical Formulator on your iOS device, just click the green Continue To App button above to start the installation process. The app is listed on our website since 2026-10-14 and was downloaded 0 times. We have already checked if the download link is safe, however for your own protection we recommend that you scan the downloaded app with your antivirus. Your antivirus may detect the Electrical Formulator as malware if the download link is broken.
How to install Electrical Formulator on your iOS device:
- Click on the Continue To App button on our website. This will redirect you to the App Store.
- Once the Electrical Formulator is shown in the iTunes listing of your iOS device, you can start its download and installation. Tap on the GET button to the right of the app to start downloading it.
- If you are not logged-in the iOS appstore app, you'll be prompted for your your Apple ID and/or password.
- After Electrical Formulator is downloaded, you'll see an INSTALL button to the right. Tap on it to start the actual installation of the iOS app.
- Once installation is finished you can tap on the OPEN button to start it. Its icon will also be added to your device home screen.
Program Details
System requirements
Download information
Pricing
Version History
version 6.0
posted on 2026-10-14
Version History Completely rewritten from scratch. New interface, ability to save multiple results, and ability to export results. 6.0 06/09/2025 Pro Bug Fix 5.0.1 07/07/2016 Totally redone code. Basis for future growth. Redone UI. Ability to see underlying formulas if you unlock pro version 5.0 06/27/2016 new charts 4.2.5 05/10/2013 New Formula, small bug fixes 4.2 03/25/2013 Electrical Charts, Links to download the latest Electrical Codes by State 4.1 01/04/2013 bug fix 4.0.2 12/06/2012 Critical Bug Fix 4.0.1 10/09/2012 iPhone 5 Support 4.0 09/26/2012 Over 35 new formulas in the voltage drop, bug fixes 3.9 09/12/2012 New Motor Formulas. Support for iPad Retina 3.8 04/23/2012 iOS 5 Compatibility 3.7 10/12/2011 New Section with Power Demand formulas and charts 3.6 08/23/2011 New Interface, Support for E Printing 400 new metric conversion formulas 3.5 06/05/2011 Added additional metric formulas plus wring chart for EU, GB, Canada and Australia 3.2 04/20/2011 New UPS calculations, Fixed Saved Calculation sync on iphone, formula tweeks 3.1 03/15/2011 Critical upgrade to prevent crash on upgrades only 3.01 11/08/2010 IF your iphone crashes on starting after upgrade delete the app and redownload a new version is on the way. iPad Native, new transformer formulas, totally redone conversion sections with over 100 new formulas. New area formulas 3.0 10/27/2010 10 New Power Factor Conversions
fractions to decimals and metric
New Wring Calculation 2.9 05/03/2010 Six new formulas
AWG inputs for Conduit Size
Conduit Offset formula
4 Motor Pulley Formulas 2.8 02/11/2010 Section in Lighting that includes:Lighting Loads for both Metric and Imperial, Hours of Usage, Number of Fittings, Room Index,
Two new transformer formulas for secondary windings
New Conversion Square Measures Metric Conversion
In² to cent², Ft² to Mt²Acres to Hectors Acres to Square Kilometers and reverse of the above
Cubic conversion: Cubic Inches to Cubic Centimeters, Cubic Feet to Cubic Meters and Cubic Yards to Cubic Meters and the reverse of the above. 2.7 12/20/2009 Four new formulas for Voltage Drop that allow entry of voltage drop in AWG
Four new formulas in Voltage Drop that allow entry in Millimeters
600 Volt Transformer Formula 2.6 11/05/2009 45 Area Formulas on Rectangles, Pyramids,Squares,Cylinders,Circles, Cones, Ellipses and Parallelograms.
Six formulas in Direct-Current Permanent Motors.
Bug Correction in Kilometers and Kilo conversions.
Bug Fix for certain regions and decimal point entry. 2.5 09/29/2009 New Motor Calculations for:
Full Load Torque
Starting Time
Energy to Overcome Inertia
Full Load Speed
Conversion from G to ft sec and back
Bug Fix In Recent
Better E-mail to support 2.4 08/19/2009 Two Phase Four Wire Calculations for Amperes when HP is known, KW is known, KVA is known, Kilowatts and Kilovolts as well as Horsepower. Additional Impedance Calculation when Resistance and Reactance are known as well whe Inductive Reactance and Capacitive REactance are known.
Conversion Section Reintroduced. 2.3 07/08/2009
version 6.0
posted on 2026-09-06
Version History Completely rewritten from scratch. New interface, ability to save multiple results, and ability to export results. 6.0 06/09/2025 This app has been updated by Apple to prepare for watchOS 27 compatibility. No new features are included.
Pro Bug Fix 5.0.1 07/07/2016 Totally redone code. Basis for future growth. Redone UI. Ability to see underlying formulas if you unlock pro version 5.0 06/27/2016 new charts 4.2.5 05/10/2013 New Formula, small bug fixes 4.2 03/25/2013 Electrical Charts, Links to download the latest Electrical Codes by State 4.1 01/04/2013 bug fix 4.0.2 12/06/2012 Critical Bug Fix 4.0.1 10/09/2012 iPhone 5 Support 4.0 09/26/2012 Over 35 new formulas in the voltage drop, bug fixes 3.9 09/12/2012 New Motor Formulas. Support for iPad Retina 3.8 04/23/2012 iOS 5 Compatibility 3.7 10/12/2011 New Section with Power Demand formulas and charts 3.6 08/23/2011 New Interface, Support for E Printing 400 new metric conversion formulas 3.5 06/05/2011 Added additional metric formulas plus wring chart for EU, GB, Canada and Australia 3.2 04/20/2011 New UPS calculations, Fixed Saved Calculation sync on iphone, formula tweeks 3.1 03/15/2011 Critical upgrade to prevent crash on upgrades only 3.01 11/08/2010 IF your iphone crashes on starting after upgrade delete the app and redownload a new version is on the way. iPad Native, new transformer formulas, totally redone conversion sections with over 100 new formulas. New area formulas 3.0 10/27/2010 10 New Power Factor Conversions
fractions to decimals and metric
New Wring Calculation 2.9 05/03/2010 Six new formulas
AWG inputs for Conduit Size
Conduit Offset formula
4 Motor Pulley Formulas 2.8 02/11/2010 Section in Lighting that includes:Lighting Loads for both Metric and Imperial, Hours of Usage, Number of Fittings, Room Index,
Two new transformer formulas for secondary windings
New Conversion Square Measures Metric Conversion
In² to cent², Ft² to Mt²Acres to Hectors Acres to Square Kilometers and reverse of the above
Cubic conversion: Cubic Inches to Cubic Centimeters, Cubic Feet to Cubic Meters and Cubic Yards to Cubic Meters and the reverse of the above. 2.7 12/20/2009 Four new formulas for Voltage Drop that allow entry of voltage drop in AWG
Four new formulas in Voltage Drop that allow entry in Millimeters
600 Volt Transformer Formula 2.6 11/05/2009 45 Area Formulas on Rectangles, Pyramids,Squares,Cylinders,Circles, Cones, Ellipses and Parallelograms.
Six formulas in Direct-Current Permanent Motors.
Bug Correction in Kilometers and Kilo conversions.
Bug Fix for certain regions and decimal point entry. 2.5 09/29/2009 New Motor Calculations for:
Full Load Torque
Starting Time
Energy to Overcome Inertia
Full Load Speed
Conversion from G to ft sec and back
Bug Fix In Recent
Better E-mail to support 2.4 08/19/2009 Two Phase Four Wire Calculations for Amperes when HP is known, KW is known, KVA is known, Kilowatts and Kilovolts as well as Horsepower. Additional Impedance Calculation when Resistance and Reactance are known as well whe Inductive Reactance and Capacitive REactance are known.
Conversion Section Reintroduced. 2.3 07/08/2009
version 6.0
posted on 2026-08-11
Version History Completely rewritten from scratch. New interface, ability to save multiple results, and ability to export results. 6.0 06/09/2025 This update from Apple will improve the functionality of this app. No new features are included.
Pro Bug Fix 5.0.1 07/07/2016 Totally redone code. Basis for future growth. Redone UI. Ability to see underlying formulas if you unlock pro version 5.0 06/27/2016 new charts 4.2.5 05/10/2013 New Formula, small bug fixes 4.2 03/25/2013 Electrical Charts, Links to download the latest Electrical Codes by State 4.1 01/04/2013 bug fix 4.0.2 12/06/2012 Critical Bug Fix 4.0.1 10/09/2012 iPhone 5 Support 4.0 09/26/2012 Over 35 new formulas in the voltage drop, bug fixes 3.9 09/12/2012 New Motor Formulas. Support for iPad Retina 3.8 04/23/2012 iOS 5 Compatibility 3.7 10/12/2011 New Section with Power Demand formulas and charts 3.6 08/23/2011 New Interface, Support for E Printing 400 new metric conversion formulas 3.5 06/05/2011 Added additional metric formulas plus wring chart for EU, GB, Canada and Australia 3.2 04/20/2011 New UPS calculations, Fixed Saved Calculation sync on iphone, formula tweeks 3.1 03/15/2011 Critical upgrade to prevent crash on upgrades only 3.01 11/08/2010 IF your iphone crashes on starting after upgrade delete the app and redownload a new version is on the way. iPad Native, new transformer formulas, totally redone conversion sections with over 100 new formulas. New area formulas 3.0 10/27/2010 10 New Power Factor Conversions
fractions to decimals and metric
New Wring Calculation 2.9 05/03/2010 Six new formulas
AWG inputs for Conduit Size
Conduit Offset formula
4 Motor Pulley Formulas 2.8 02/11/2010 Section in Lighting that includes:Lighting Loads for both Metric and Imperial, Hours of Usage, Number of Fittings, Room Index,
Two new transformer formulas for secondary windings
New Conversion Square Measures Metric Conversion
In² to cent², Ft² to Mt²Acres to Hectors Acres to Square Kilometers and reverse of the above
Cubic conversion: Cubic Inches to Cubic Centimeters, Cubic Feet to Cubic Meters and Cubic Yards to Cubic Meters and the reverse of the above. 2.7 12/20/2009 Four new formulas for Voltage Drop that allow entry of voltage drop in AWG
Four new formulas in Voltage Drop that allow entry in Millimeters
600 Volt Transformer Formula 2.6 11/05/2009 45 Area Formulas on Rectangles, Pyramids,Squares,Cylinders,Circles, Cones, Ellipses and Parallelograms.
Six formulas in Direct-Current Permanent Motors.
Bug Correction in Kilometers and Kilo conversions.
Bug Fix for certain regions and decimal point entry. 2.5 09/29/2009 New Motor Calculations for:
Full Load Torque
Starting Time
Energy to Overcome Inertia
Full Load Speed
Conversion from G to ft sec and back
Bug Fix In Recent
Better E-mail to support 2.4 08/19/2009 Two Phase Four Wire Calculations for Amperes when HP is known, KW is known, KVA is known, Kilowatts and Kilovolts as well as Horsepower. Additional Impedance Calculation when Resistance and Reactance are known as well whe Inductive Reactance and Capacitive REactance are known.
Conversion Section Reintroduced. 2.3 07/08/2009
version 6.0
posted on 2025-06-09
Completely rewritten from scratch. New interface, ability to save multiple results, and ability to export results.
version 6.0
posted on 2025-06-09
Jun 9, 2025
Version 6.0
Completely rewritten from scratch. New interface, ability to save multiple results, and ability to export results.
version 5.0.1
posted on 2016-07-07
Jul 7, 2016 Version 5.0.1
Pro Bug Fix
version 5.0.1
posted on 2016-07-07
7 Jul 2016 Version 5.0.1
Pro Bug Fix
version 5.0.1
posted on 2016-07-07
Jul 7, 2016 Version 5.0.1
This app has been updated by Apple to use the latest Apple signing certificate.
Pro Bug Fix
version 5.0.1
posted on 2016-07-07
Jul 7, 2016 Version 5.0.1
This app has been updated by Apple to display the Apple Watch app icon.
Pro Bug Fix
version 5.0.1
posted on 2008-12-14
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