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Version and revision numbering of all calculators was reset in 2023 to an easy to follow three number format, for example 25.1.7, where the first two digits of the number indicate the year of the revision, the second number indicates the month, and the last indicates the version. This should make updating more intuitive. All applications conform to current codes in US (up to NEC 2023) and Canada (CEC 2024). Minor improvements have been made in all applications - upgrade is mainly to adapt to Windows 11 that continues to evolve.

Easy Download and Setup:

Click on the links below to download and save each calculator.
Open downloaded folders, files or unzip them if necessary.
Run the setup.exe file by double-clicking.

If upgrading, please read software upgrades instructions.

Voltage Drop Calculator

⤓ Voltage_Drop_Calculator-R25-1-7.zip 2.1MB (Rev. January 2025)

Lighting Calculator

⤓ Lighting_Level_Calculator-R25-1-7.zip 2.1MB (Rev. January 2025)

Underground Conductors Ampacity Calculator

⤓ Underground_Ampacity-R25-1-7.zip 2.5MB (Rev. January 2025)

Freeware

Electrical Calculator

⤓ Electrical_Calculator-R25-1-7.zip 1.5MB Freeware (Rev. January 2025)

Conductor Ampacity Calculator - CEC Canada

⤓ Conductor_Ampacity_CEC-R25-1-7.zip 1.4MB Freeware (Rev. January 2025)

Conductor Ampacity Calculator - NEC U.S.

⤓ Conductor_Ampacity_NEC-R25-1-7.zip 1.4MB Freeware (Rev. January 2025)

Softpedia Certified

System Requirements:

PC running Microsoft® Windows® 95, 98, ME, 2000, XP, 7, 8, 10, 11 (32/64 bit OS).

Software

Reviews

"Electrical Calculator is a simple, useful and effective application worth having when you need to quickly calculate and estimate available short circuits. Specially intended for electrical engineers and contractors, Electrical Calculator enables you to perform various calculations and determine the values on both sides of the transformer. The application comes with a user-friendly interface and enables you to change the primary voltage and current as you prefer, then quickly view all the generated results." – Softpedia Review

"Underground Cable Ampacity is a handy application designed to enable you to find the allowable ampacity for underground cable configurations by looking at the tables and diagrams of the Canadian Electrical Code. Using this underground cable ampacity calculator you will be done in a minute. It will save you hours in a year, and most importantly it will reduce the chance of making an error." – Softpedia Review

"Electrical Calculator proves to be a useful and reliable application whose main purpose is to provide electrical engineers with the right tools when calculating the transformer primary and secondary current, protection and selecting downstream equipment interrupting capacity rating. "– Softpedia Review

"NEC Ampacity Calculator is an efficient piece of software ... dedicated to users that need to often look-up NEC tables and apply correction factors." – Softpedia Review