ELECTRICAL CALCULATION TOOLS
Professional-grade calculators for electricians
Built by electricians, for electricians. Fast, accurate, and always code-compliant.
Visual Conduit Bender
NEC 2023 Chapter 9, Table 2
Calculate offset bend marks, shrink, and distance between bends. Interactive visualization shows your conduit path in real-time.
- › Offset calculations (10°, 22.5°, 30°, 45°, 60°)
- › Shrink calculator
- › Visual SVG bend preview
- › Fractional inch display
Conduit Fill Master
NEC 2023 Chapter 9, Tables 1, 4, 5
Calculate if your wires fit in conduit without code violations. Check fill percentages for EMT, IMC, RMC, and PVC conduits.
- › EMT, IMC, RMC, PVC support
- › Multi-wire calculations
- › Fill percentage compliance
- › Wire size recommendations
Box Fill Calculator
NEC 2023 Article 314.16
Calculate minimum junction box volume required for your conductors, devices, and fittings.
- › Wire volume calculations
- › Device fill allowances
- › Clamp and fitting volumes
- › Box size recommendations
Voltage Drop Visualizer
NEC 2023 Article 210.19(A), Chapter 9 Table 8
Calculate voltage drop for single-phase and three-phase circuits. Ensure your wire size meets NEC requirements.
- › Single & three-phase support
- › Copper & aluminum conductors
- › Distance-based calculations
- › NEC 3% / 5% limit compliance
Grounding Electrode Sizer
NEC 2023 Articles 250.66, 250.122
Determine grounding electrode conductor and equipment grounding conductor sizes based on service or breaker size.
- › Grounding electrode conductor sizing
- › Equipment grounding conductor sizing
- › Copper & aluminum support
- › Service panel diagrams
Why TradeMathPro Electrical?
NEC Compliant
Every calculation verified against NEC 2023 standards. Reference code articles included with each tool.
Field-Tested
Built by working electricians who understand the real-world challenges you face on the job.
Mobile First
Works perfectly on your phone, tablet, or desktop. No app download required.
Frequently Asked Questions
Are these calculators NEC 2023 compliant?
Yes! All calculations are based on NEC 2023 code requirements. Each tool includes references to specific NEC articles and tables.
Do I need to create an account?
No account required! All tools work instantly in your browser. Optional save feature coming soon for calculation history.
When will the remaining tools be available?
We're rolling out new tools every 2-3 weeks. Conduit Fill is next, followed by Voltage Drop, Box Fill, and Grounding calculators.
Can I use these offline?
Currently requires internet connection. Offline support via Progressive Web App (PWA) is planned for a future update.