Code calculators for electrical professionals

Public summaries with FAQs—open the matching tool in the app when you are ready to calculate.

Current Systems is an online electrical calculator platform: service and demand load tools, voltage drop, conduit fill, conductor ampacity, box fill, tap rules, and inspector-style PDF reports. Browse the topics below, then sign in to run the calculators in the app.

Looking for deeper context? See our blog articles on load calculations, voltage drop, conduit fill, and permit-ready documentation.

All calculator pages

• Residential load calculator
• Commercial and institutional load calculator
• Voltage drop calculator
• Conduit fill calculator
• Conductor ampacity calculator
• Conductor ampacity plus voltage drop
• Box fill calculator
• Tap conductor calculator
• Electrical File Center (saved calculations)
• PDF reports overview

FAQ

Where can I run electrical load and Code-aligned calculators online?

Current Systems offers load, voltage drop, conduit fill, conductor ampacity, box fill, tap conductor tools, and more. Use the links on this page to open each tool in the app (account required). These public pages explain what each calculator does and how it supports professional electrical work.

Are these calculators a substitute for the adopted electrical code?

No. Tools apply common Code-aligned calculation practices to help electricians and contractors document their work. You must follow the adopted code and the authority having jurisdiction for every installation.

Can I save results or export PDF reports?

Yes. Inside the app you can organize calculations and generate professional PDFs suitable for records, clients, and permit packages where permitted by your AHJ.