# Conduit Fill Pro — Capacity Calculator & Code

> Professional electrician's calculator for conduit fill, junction box, and voltage drop. (iPhone/iPad app by Mikhail Nikitin.)

- Source: https://appshunter.io/ios/app/conduit-fill-pro/id6761177494 (this page in markdown: same URL + `.md`)
- Developer: [Mikhail Nikitin](https://appshunter.io/developer/1826368571)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 3.70/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 26 MB
- Languages: American English
- Released: 2026-04-06
- Data updated: 2026-08-21
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/conduit-fill-pro/id6761177494/reviews.md

## What is Conduit Fill Pro?

All your electrical calculations in one place — fast, accurate, and code-compliant.
ConduitFill Pro is a professional electrician's calculator built for modern electrical work. Every result includes formulas, steps, and code references, so you can verify the work with confidence. Used by apprentices, journeymen, master electricians, and inspectors.
Conduit Fill Calculator supports EMT, IMC, RMC, PVC (Sch 40/80), ENT, FMC, and LFMC across 10 trade sizes and multiple insulation types including THHN, XHHW, RHH, THW, and USE-2. Verifies against standard fill limits (53% / 31% / 40%) and includes Nipple Mode for 60% fill on runs under 24 inches.
Find Minimum Conduit Size by entering wire count and gauge to instantly get the smallest compliant conduit for your installation.
Junction Box Fill calculates conductors, clamps, devices, equipment grounding conductors, and fixture studs and hickeys.
Voltage Drop Calculator supports single-phase and three-phase systems, copper and aluminum conductors, and automatically determines minimum wire size. Easily check voltage drop for conductors from your conduit fill calculation.
Every calculation includes a full step-by-step breakdown with formulas and values — no black box. You see exactly how results are calculated.
Built-in reference tables cover conduit fill percentages, conduit areas, conductor areas, ampacity ratings, and box fill rules. All data aligns with current industry standards.
Generate clean PDF reports with inputs, formulas, references, and timestamps — ready for inspections and project documentation.
Works fully offline with all reference data stored locally. No internet required, making it reliable on job sites, basements, and panel rooms.
Conduit Fill Pro is built for real-world electrical work — fast, transparent, and reliable

Privacy Policy: https://docs.nikitin.fyi/com.conduitfill.calculator/privacy-policy.html
Terms of Service: https://docs.nikitin.fyi/com.conduitfill.calculator/terms-of-service.html

## Key features

- Conduit fill calculations for various types and sizes
- Junction box fill analysis
- Voltage drop calculator
- Step-by-step breakdowns with formulas and code references
- Built-in reference tables
- Offline functionality
- PDF report generation

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| premium | $4.99 | per month |
| premium | $29.99 | per year |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/conduit-fill-pro/id6761177494/reviews.md

### 5/5 — Impressed

*2026-04-08*

Download this if you hate doing math on a jobsite. The UI is intuitive- you just select the conduit type, pick your wire size/type, and hit calculate. It’s scary how accurate it is compared to my manual calculations.

Love the Box Fill add-on. Finally an app that accounts for the volume of the straps and devices, not just the wires. The Reference section is handy for quick lookups without carrying the heavy NEC book around. 10/10, keeping this on my home screen.

## Frequently asked questions about Conduit Fill Pro

### What electrical calculations does Conduit Fill Pro offer?

Conduit Fill Pro offers conduit fill calculations for various conduit types and sizes, junction box fill analysis, and voltage drop calculations for single-phase and three-phase systems. It supports multiple wire insulation types and verifies against standard fill limits.

### Does Conduit Fill Pro work offline?

Yes, Conduit Fill Pro works fully offline. All necessary reference data is stored locally on your device, ensuring reliability on job sites without internet access.

### Can I generate reports with Conduit Fill Pro?

Yes, you can generate clean PDF reports that include your inputs, formulas, code references, and timestamps. These reports are useful for inspections and project documentation.

### What electrical codes does Conduit Fill Pro reference?

The app aligns with current industry standards and includes references to standard fill limits (53% / 31% / 40%) and Nipple Mode for 60% fill on shorter runs. Specific code versions are not detailed but it's designed for code compliance.

### What are the subscription options for Conduit Fill Pro?

Conduit Fill Pro offers a premium subscription with monthly ($4.99/P1M) and annual ($29.99/P1Y) plans. The annual plan includes a 7-day free trial.

### How does Conduit Fill Pro compare to other electrician calculators?

Conduit Fill Pro differentiates itself by providing detailed step-by-step breakdowns for every calculation, including formulas and code references, ensuring transparency. It also offers comprehensive offline functionality and PDF report generation.

### What is the age rating for Conduit Fill Pro?

Conduit Fill Pro has an age rating of 4+. This indicates it is suitable for a wide audience, though its professional utility is geared towards adults in the electrical trade.

### How often is Conduit Fill Pro updated?

The app was last updated on April 6, 2026, with version 1.0. Future updates will likely focus on incorporating the latest electrical code changes and user-requested features.

## Version history (last 1 release)

### 1.0 — 2026-04-06

No release notes.

## Apps similar to Conduit Fill Pro

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [NEC Box & Conduit Calc](https://appshunter.io/ios/app/nec-box-and-conduit-calc/id6755513987) | 4.9 (18) | Free | Utilities |
| [Conduit Fill & Bending Calc](https://appshunter.io/ios/app/conduit-fill-and-bending-calc/id6768075426) | 5.0 (3) | Free | Utilities |
| [ElectriCalc Pro](https://appshunter.io/ios/app/electricalc-pro/id569677304) | 4.9 (353) | Free | Utilities |
| [FILL ◦ Conduit Fill Calculator](https://appshunter.io/ios/app/fill-conduit-fill-calculator/id6760678246) | 4.0 (3) | Free | Utilities |
| [Electrical Toolkit by HCP](https://appshunter.io/ios/app/electrical-toolkit-by-hcp/id6743806467) | 4.6 (68) | Free | Utilities |
| [Voltage Drop Calculator.](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064) | 4.6 (412) | Free | Utilities |

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All apps by Mikhail Nikitin: https://appshunter.io/developer/1826368571

## Related topics

[conduit fill](https://appshunter.io/ios/topics/conduit-fill) · [prysmian group conduit fill](https://appshunter.io/ios/topics/prysmian-group-conduit-fill) · [conduit fill capacity calculator](https://appshunter.io/ios/topics/conduit-fill-capacity-calculator)

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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 2026-08-21.*