# Derated: Conduit Fill — Fill and Derating Calculator

> Electrical conduit fill and wire derating calculator based on NEC guidelines. (iPhone/iPad app by Bret Hardman.)

- Source: https://appshunter.io/ios/app/derated-conduit-fill/id6468839409 (this page in markdown: same URL + `.md`)
- Developer: [Bret Hardman](https://appshunter.io/developer/788803580)
- Category: Productivity, Utilities
- Price: $1.99
- Rating: 4.90/5 from 10 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English
- Released: 2024-01-21
- Data updated: 2026-08-20
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/derated-conduit-fill/id6468839409/reviews.md

## What is Derated?

Experience the simplicity of Derated, a cutting-edge conduit fill calculator designed with electricians in mind. This intuitive app goes beyond the basics, allowing you to effortlessly calculate conduit fill while simultaneously derating wires' ampacity. All in real-time.

Adhering to the guidelines of the National Electric Code® (NEC), Derated simplifies complex calculations, providing accurate results without the hassle of load screens. Choose from various raceways and insulations outlined in the NEC, with dimensions and conduit/tubing area references from Chapter 9, Table 4. Insulated conductor dimensions are sourced from Chapter 9, Table 5.

Setting up calculations is as easy as QuickBend, ensuring a straightforward process for adding sets of wires. The results are not only accurate but also easily shareable. Whether you're collaborating with colleagues or explaining a wire pull to a client, Derated streamlines communication by sharing results effortlessly.

## Key features

- Real-time conduit fill calculation
- Simultaneous wire ampacity derating
- Adheres to NEC guidelines
- Uses NEC Chapter 9, Table 4 & 5 data
- Easy wire set setup
- Shareable calculation results

## Chart rankings

- #197 in Top Paid · Productivity (US App Store)


## Frequently asked questions about Derated

### What is Derated used for?

Derated is a conduit fill calculator designed for electricians. It helps you calculate how many wires can fit into a conduit and simultaneously derates their ampacity according to National Electric Code® (NEC) guidelines.

### Does Derated have ads?

No, Derated is ad-free, providing an uninterrupted user experience for performing critical electrical calculations.

### How much does Derated cost?

Derated is a paid application, available for a one-time purchase of $1.99. This price grants you full access to all its features.

### What electrical standards does Derated follow?

Derated adheres to the guidelines of the National Electric Code® (NEC). It uses dimensions and area references from NEC Chapter 9, Table 4 and insulated conductor dimensions from Chapter 9, Table 5.

### Can I share my calculations from Derated?

Yes, the accurate results from Derated are easily shareable. This feature streamlines communication with colleagues or clients regarding wire pulls and calculations.

### What devices is Derated compatible with?

Derated is available for iPhone and iPad, making it accessible on Apple mobile devices.

### How often is Derated updated?

Derated was last updated on January 22, 2024, with version 1.0. This indicates it is a relatively new application, and updates are expected as it evolves.

### What is the user sentiment for Derated?

Users have rated Derated highly, with an average of 4.8 stars from 5 ratings. This suggests a very positive user experience and satisfaction with its functionality.

## Version history (last 1 release)

### 1.0 — 2024-01-22

No release notes.

## Apps similar to Derated

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Prysmian Group Conduit Fill](https://appshunter.io/ios/app/prysmian-group-conduit-fill/id847895487) | 3.0 (2) | Free | Productivity |
| [Ductulator - Duct Sizing](https://appshunter.io/ios/app/ductulator-duct-sizing/id1474939475) | 4.7 (317) | $3.99 | Productivity |
| [Ugly's Electrical References](https://appshunter.io/ios/app/uglys-electrical-references/id1134770838) | 4.4 (1,482) | $12.99 | Productivity |
| [BendMaster Bend Calculator](https://appshunter.io/ios/app/bendmaster-bend-calculator/id6741347447) | 5.0 (1) | $1.99 | Productivity |
| [Electrician's Sidekick](https://appshunter.io/ios/app/electricians-sidekick/id1569068184) | 3.5 (16) | Free | Productivity |
| [Duct Construction](https://appshunter.io/ios/app/duct-construction/id6443518338) | 1.0 (1) | $0.99 | Productivity |

## More apps by Bret Hardman

- [RIGID: Conduit Bending Calculator](https://appshunter.io/ios/app/rigid-conduit-bending-calculator/id788803577)
- [Phased: Circuit Colors](https://appshunter.io/ios/app/phased-circuit-colors/id898615603)
- [SoundBored* Build Your Own Soundboard](https://appshunter.io/ios/app/soundbored-build-your-own-soundboard/id939216699)
- [QuickBend: Conduit Bending](https://appshunter.io/ios/app/quickbend-conduit-bending/id1010311475)
- [mathCards ÷ x + -](https://appshunter.io/ios/app/mathcards-x-plus/id1039131735)
- [PIER: Ohm's Law Calculator](https://appshunter.io/ios/app/pier-ohms-law-calculator/id1166009550)

All apps by Bret Hardman: https://appshunter.io/developer/788803580

## Related topics

[southwire conduit fill](https://appshunter.io/ios/topics/southwire-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 2026-08-20.*