# Box Fill Pro - Electrician — NEC 2023 Box Fill Calculator

> NEC 2023 Box Fill Calculator (iPhone/iPad app by BRUCE RAY MCCAMPBELL.)

- Source: https://appshunter.io/ios/app/box-fill-pro-electrician/id6780626078 (this page in markdown: same URL + `.md`)
- Developer: [BRUCE RAY MCCAMPBELL](https://appshunter.io/developer/6772438648)
- Category: Utilities, Business
- Price: Free with in-app purchases (on sale, was $4.99)
- Age rating: 4+
- Requires: iOS 15.1 · 48 MB
- Languages: American English
- Released: 2026-06-18
- Data updated: 2026-08-19
- User reviews in markdown: https://appshunter.io/ios/app/box-fill-pro-electrician/id6780626078/reviews.md

## What is Box Fill Pro?

Box Fill Pro calculates electrical box fill per NEC 2023 Article 314.16 — the code section that determines how many wires, devices, and fittings can legally fit in a junction or device box.

Works offline. No subscription. One-time purchase.

WHAT IT CALCULATES
- Line-voltage conductors by AWG gauge (14, 12, 10, 8, 6)
- Equipment grounding conductors (all EGCs combined = one allowance, per 314.16(B)(5))
- Internal cable clamps (all clamps = one allowance, per 314.16(B)(2))
- Luminaire studs and hickeys
- Strap-mounted devices (switches, receptacles)

VERDICTS BACKED BY CODE
Compares your fill total against NEC Table 314.16(A) box capacities. Get an instant PASS or FAIL — and a suggested upgrade if you're overfilled.

BUILT FOR THE FIELD
No ads. No cloud. No account required. Designed for electricians who need the answer in seconds, not after a signup flow.

PART OF THE FIELDMETRIC SUITE
Also available: Conduit Fill Pro (NEC conduit fill calculations).

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Box Fill Pro | $4.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-06-18

No release notes.

## Apps similar to Box Fill Pro

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Building Wire Selector](https://appshunter.io/ios/app/building-wire-selector/id6670218338) | 5.0 (2) | Free | Utilities |
| [NEC Box & Conduit Calc](https://appshunter.io/ios/app/nec-box-and-conduit-calc/id6755513987) | 4.9 (18) | Free | Utilities |
| [VFD Cable Sizing Calc](https://appshunter.io/ios/app/vfd-cable-sizing-calc/id6452802915) | — | Free | Utilities |
| [Box Fill 2](https://appshunter.io/ios/app/box-fill-2/id1589765411) | 3.0 (2) | $3.99 | Utilities |
| [Transformer Calc NEC](https://appshunter.io/ios/app/transformer-calc-nec/id6763311943) | — | $0.99 | Utilities |
| [Voltage Drop Calculator.](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064) | 4.6 (412) | Free | Utilities |

## More apps by BRUCE RAY MCCAMPBELL

- [Conduit Fill Pro - Electrician](https://appshunter.io/ios/app/conduit-fill-pro-electrician/id6772438646)
- [Spray Foam Pro-Insulation Calc](https://appshunter.io/ios/app/spray-foam-pro-insulation-calc/id6772439649)
- [Drain Slope Pro - Plumber](https://appshunter.io/ios/app/drain-slope-pro-plumber/id6772439957)
- [Voltage Drop Pro - Electrician](https://appshunter.io/ios/app/voltage-drop-pro-electrician/id6781791471)

All apps by BRUCE RAY MCCAMPBELL: https://appshunter.io/developer/6772438648

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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 2026-08-19.*