The New Gold Standard for
Electrical Calculations
Offline-first. Globally ready. Built for the field. The only electrical calculator with a visual conduit engine, multi-cycle NEC logic, jurisdiction awareness, and professional reporting.
Built to Replace Rule-of-Thumb Electrical Math
Electrical work demands precision. ConduitLab replaces guesswork with verified NEC-aligned logic and field-ready visualization.
Multi-Cycle NEC Logic
Supports NEC 2017–2026. Adjustments, temperature corrections, bundling, rooftop rules, and more—applied automatically.
Jurisdiction Awareness
Automatically detects your region's NEC code cycle and lets you override manually at any time.
Real Geometry
A true geometric engine simulates wire placement inside conduit. If it fits in ConduitLab, it fits on the job.
See Inside the Conduit with
Mini-CAD Visualization
The conduit fill calculator reimagined. Visualize real conductor geometry, packing efficiency, spacing, and jam conditions before pulling wire.
- Drag-and-drop wire placement
- Auto Pack optimizes layout instantly
- Jam awareness for problematic ratios
- X-Ray mode for dense conduit bundles
Actual app interface captured on iPhone Simulator
The ConduitLab Report™:
Professional-Grade Documentation
Generate clear, consistent calculation reports designed for inspectors, engineers, and project documentation.
What Makes It Different
NEC-Referenced Methodology
Each report references relevant NEC principles for transparency and code alignment.
Exact AC Voltage Drop
Uses impedance-based AC calculations considering conductor type, raceway material, and power factor.
Visual Conduit Appendix
A generated cross-section diagram shows exactly how the wires fit inside the conduit.
Designed for Inspectors & Engineers
Reports are formatted for clarity. Inputs, outputs, and assumptions are fully visible, reducing inspection delays.
View Example Report Download Sample PDFFor Inspectors: Standardized & Code-Backed
Standardized reports with clear inputs, NEC-referenced math, and visual conduit diagrams allow you to verify installations quickly and confidently.
Read the Inspector's Guide2025
Raceway: EMT
Method: Impedance-based AC calculation
Code Cycle: NEC 2023
Always on the Right NEC Code Cycle
ConduitLab detects your region and suggests the applicable NEC cycle automatically. You can override the code year at any time.
Exact Calculations for the Field
Everything you need—fast, accurate, and offline.
Ampacity Calculator
Full NEC adjustment engine. Handles rooftop conditions, bundling, temperature corrections, and terminal temperature limits.
Voltage Drop
Impedance-based AC method with power factor and raceway adjustments. Get results that match real-world measurements.
Conduit Fill
Exact dimensional modeling using NEC-aligned conductor geometry. Supports nipples, EMT, PVC, RMC, and IMC with jam detection.
Frequently Asked Questions
Which NEC versions does ConduitLab support?
ConduitLab supports NEC 2017, NEC 2020, NEC 2023, and NEC 2026. The app can automatically select the prevalent code cycle for your region, and you may override it at any time.
What is the ConduitLab Report?
It is a standardized PDF report with all inputs, NEC-referenced methodology, and a conduit cross-section appendix. It replaces screenshots and inconsistent documentation.
Does the app work offline?
Yes. Every calculation engine—including ampacity, voltage drop, and the conduit visualizer—runs locally on your device.