# ConduitLab: NEC Calculator — NEC Voltage Drop & Fill Calc

> Professional NEC electrical calculator with 2D conduit fill visualization and PDF reports. (iPhone/iPad app by Teleios AI, LLC.)

- Source: https://appshunter.io/ios/app/conduitlab-nec-calculator/id6757708241 (this page in markdown: same URL + `.md`)
- Developer: [Teleios AI, LLC](https://appshunter.io/developer/1868405452)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.1 · 58 MB
- Languages: English
- Released: 2026-01-21
- Data updated: 2026-06-21
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/conduitlab-nec-calculator/id6757708241/reviews.md

## What is ConduitLab?

ConduitLab is a professional NEC electrical calculator for electricians, inspectors, contractors, and engineers. It combines ampacity, voltage drop, conduit fill, wire sizing, PDF reports, and an interactive 2D conduit fill visualizer in one field-ready app.

SEE CONDUIT FILL BEFORE YOU PULL

Most electrical calculators only show a percentage. ConduitLab helps you see the layout.

Use the 2D conduit fill visualizer to view conductors inside the raceway, check fill percentage, spot tight layouts, and use X-Ray mode for a clearer look at packed conduits.

Plan pulls, review layouts, and catch conduit fill problems before the wire is already in the pipe.

CORE ELECTRICAL CALCULATIONS

Ampacity — real-world derating applied  
Calculate wire sizing with ambient temperature correction, rooftop exposure adjustments, terminal temperature limits, conductor count effects, and continuous-load factors applied together.

Voltage Drop — catch issues before inspection  
Run single-phase and 3-phase voltage drop calculations for branch circuits and feeders, including advanced options for long runs, larger conductors, and field conditions.

Conduit Fill — visual and code-based  
Apply NEC Chapter 9 fill limits while using the 2D conduit fill visualizer to better understand how conductors fit inside the conduit.

INSPECTOR-READY PDF REPORTS

Generate clean, professional electrical calculation reports for documentation, submittals, inspections, and permanent records.

Reports can include:
• Project inputs and calculated results
• NEC-based citations by edition
• Ampacity, voltage drop, and conduit fill summaries
• Jobsite-ready calculation records
• Clean documentation for field review

LITE AND PRO OPTIONS

ConduitLab includes a Lite mode for common residential and light commercial calculations.

ConduitLab Pro unlocks:
• Full wire size range up to 2000 kcmil
• 3-phase and exact voltage drop tools
• Interactive 2D conduit fill visualization
• X-Ray conduit visualizer mode
• Unlimited PDF exports
• Expanded professional features

BUILT FOR JOBSITE USE

• Offline-first calculations
• Fast, repeatable results
• No account required
• Designed for electricians, inspectors, contractors, and engineers
• Built for real field workflows, not generic desktop math

IMPORTANT DISCLAIMER

ConduitLab is a reference and documentation tool only. It does not provide engineering services or code-compliance certification. Users are responsible for verifying all results and complying with applicable electrical codes, local amendments, and Authority Having Jurisdiction requirements.

Subscriptions unlock advanced features and unlimited PDF exports.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Ampacity calculations with derating
- Voltage drop calculations
- 2D conduit fill visualizer
- X-Ray conduit mode
- Inspector-ready PDF reports
- Offline-first calculations

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| ConduitLab Pro (Weekly) | $1.99 | per 7 days |
| ConduitLab Pro (Monthly) | $4.99 | per month |
| ConduitLab Pro (Yearly) | $34.99 | per year |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/conduitlab-nec-calculator/id6757708241/reviews.md

### 5/5 — Visualizer is amazing

*2026-05-02*

Love the conduit fill visualizer!

## Frequently asked questions about ConduitLab

### What is ConduitLab?

ConduitLab is a professional NEC electrical calculator designed for electricians, inspectors, contractors, and engineers. It offers features like ampacity, voltage drop, and conduit fill calculations, along with a 2D visualizer and PDF reporting.

### Does ConduitLab have ads?

No, ConduitLab does not contain advertisements. The app is free to download and use, with optional in-app purchases for advanced features.

### What calculations does ConduitLab offer?

ConduitLab offers core electrical calculations including ampacity with real-world derating, single-phase and 3-phase voltage drop, and NEC-based conduit fill limits. It also features a 2D visualizer for conduit layouts.

### Can I generate reports with ConduitLab?

Yes, ConduitLab allows you to generate clean, professional electrical calculation reports in PDF format. These reports are suitable for documentation, submittals, and permanent records.

### What features are unlocked in ConduitLab Pro?

ConduitLab Pro unlocks the full wire size range up to 2000 kcmil, 3-phase and exact voltage drop tools, the interactive 2D conduit fill visualizer, X-Ray mode, and unlimited PDF exports.

### Is ConduitLab available offline?

Yes, ConduitLab is built for jobsite use and features offline-first calculations, meaning you can perform essential calculations without an internet connection.

### What is the age rating for ConduitLab?

ConduitLab has an age rating of 4+ and is available on iPhone, iPad, and iPod devices.

### How often is ConduitLab updated?

The latest version of ConduitLab is 1.03, which was last updated on May 8, 2026. Updates typically focus on improving features and reliability for field use.

## Version history (last 3 releases)

### 1.03 — 2026-05-08

This update improves voltage drop accuracy for larger wire sizes, refines the conduit fill visualizer, and fixes a display issue that could affect grounding conductor fill calculations.

### 1.01 — 2026-02-22

• Added 7-Day Free Trial option for Annual Pro plan
• Improved subscription experience and paywall clarity
• Refinements to Visual Conduit Fill preview behavior
• Minor UI improvements and stability updates

### 1.0 — 2026-01-21

No release notes.

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## More apps by Teleios AI, LLC

- [FireStopLab](https://appshunter.io/ios/app/firestoplab/id6758409219)
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All apps by Teleios AI, LLC: https://appshunter.io/developer/1868405452

## Related topics

[NEC calculator](https://appshunter.io/ios/topics/nec-calculator) · [conduit app](https://appshunter.io/ios/topics/conduit-app)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-21.*