# Box Fill 2

> Pro-grade electrical box fill and construction calculator for trades. (iPhone/iPad app by Snappy Appz Inc..)

- Source: https://appshunter.io/ios/app/box-fill-2/id1589765411 (this page in markdown: same URL + `.md`)
- Developer: [Snappy Appz Inc.](https://appshunter.io/developer/375591377)
- Category: Utilities, Productivity
- Price: $3.99
- Rating: 3.30/5 from 3 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 19 MB
- Languages: American English
- Released: 2021-10-17
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/box-fill-2/id1589765411/reviews.md

## What is Box Fill 2?

Box Fill 2: Electrical & Construction Calculator

Stop guessing and start calculating with confidence.

Box Fill 2 is the ultimate pro-grade utility for electricians, contractors, and engineers. Designed to streamline your workflow from the office to the job site, it combines a precision electrical box fill calculator with a full-featured construction calculator in one powerful, intuitive interface.

EXPERT ELECTRICAL CALCULATIONS
Stay compliant and safe with box fill calculations based on the latest standards, including the 2024 Canadian Electrical Code (CEC) and the 2023 National Electrical Code (NEC).
Complete Fill Schedules: Create and save an unlimited list of calculations for entire projects.
Advanced Device Logic: Automatically handles standard devices and "bulky" equipment (like smart dimmers or GFCIs) using the specific depth-based volume math required by the CEC.
Detailed Conductor Tracking: Easily account for insulated conductors, bare grounds (with the NEC "4-ground" rule), internal clamps, and wire nuts.
Custom Box Support: Use standard trade sizes or enter custom dimensions for specialized enclosures.
Share & Export: Print directly from the app or share professional calculation reports via email or messaging to inspectors and team members.

FULL CONSTRUCTION CALCULATOR
No more switching between apps. Box Fill 2 includes a robust construction math engine designed for the trades.
Dimensional Math: Work directly in feet-inches-fractions or metric units with seamless conversions.
Area & Volume: Quickly solve for square footage and cubic volume for materials like concrete, drywall, and paint.
Right-Angle Solutions: Instantly calculate rafters, slopes, and square-ups for precise layouts.
History & Memory: Access previous calculations and save frequently used values to save time on repetitive tasks.

MODERN & PROFESSIONAL FEATURES
Universal Compatibility: Buy once and use on your iPhone, iPad, and Mac.
iCloud Sync: Your project data stays up-to-date across all your devices automatically.
Dark Mode Support: Optimized for high visibility in low-light job site conditions.
Clean Interface: Ad-free, professional UI designed for speed and clarity under pressure.

Put your pencil down and upgrade your toolkit. Download Box Fill 2 today.

## Key features

- Electrical box fill calculations
- Construction calculator
- Dimensional math (feet-inches-fractions, metric)
- Area and volume calculations
- Right-angle solutions
- Shareable calculation reports
- iCloud sync across devices

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/box-fill-2/id1589765411/reviews.md

### 4/5 — Good

*2026-02-20*

Is there a way to get it to display in cu/in?   Then it would be perfect.  I figure there is but I don’t know where that setting is.  I have a iPhone SE and it displays a little crowded.

### 3/5 — Doesn’t calculate accurately

*2025-12-09*

This app does not include calculations for your equipment grounding conductor, barriers, wire loops, and terminal block fill. 

Imputing information into the “largest attached wire to device” is not clearly explained. 

Needs instruction. 

Update to current code cycle.

### 3/5 — Not bad

*2025-02-03*

Needs to have more wire size options. 14-6 only

**Developer response:** That's the only wire sizes listed in the code book for box fill, Table 22 and 23 of the CEC.  Usable space for conductors above #6 would be a guess on our part.

## Frequently asked questions about Box Fill 2

### What electrical codes does Box Fill 2 support?

Box Fill 2 supports the latest electrical codes, including the 2024 Canadian Electrical Code (CEC) and the 2023 National Electrical Code (NEC). This ensures your calculations are compliant and safe for your projects.

### Can I save my calculations with Box Fill 2?

Yes, you can create and save an unlimited list of calculations for entire projects. This feature helps you manage complex jobs and revisit previous calculations easily.

### Does Box Fill 2 handle custom box sizes?

Yes, Box Fill 2 supports custom box sizes in addition to standard trade sizes. You can enter specific dimensions for specialized enclosures, ensuring accurate fill calculations for any situation.

### What construction calculations can Box Fill 2 perform?

Box Fill 2 includes a full construction calculator for dimensional math in feet-inches-fractions or metric units, area and volume calculations, and right-angle solutions for rafters and slopes. It also features history and memory functions.

### Is Box Fill 2 available on multiple devices?

Box Fill 2 is universally compatible, meaning you can buy it once and use it on your iPhone, iPad, and Mac. iCloud sync keeps your project data updated across all your Apple devices automatically.

### Does Box Fill 2 have ads?

No, Box Fill 2 is ad-free. It features a clean, professional UI designed for speed and clarity, ensuring an uninterrupted user experience on the job site.

### How often is Box Fill 2 updated?

Box Fill 2 was last updated on January 8, 2026, with version 1.2.0. The app is designed to be reliable and stay current with relevant code changes and feature enhancements.

### What is the price of Box Fill 2?

Box Fill 2 is a paid application priced at $3.99. This one-time purchase provides access to all its professional-grade electrical and construction calculation features.

## Version history (last 5 releases)

### 1.2.0 — 2026-01-08

- Updated to 2024 CEC.
- Updated to 2023 NEC.
- Full dark mode support.
- Help text improved.
- Update and follow screen added.

### 1.1.0 — 2025-10-27

- Updated to iOS 26 target.
- Fixed minor bugs.

### 1.0.10 — 2024-01-15

- Fixed a bug causing NEC code to calculate 'other' fill incorrectly since last update.

### 1.0.9 — 2024-01-15

- Added support for cubic inch, just tap the mL to change to in3.

### 1.0.7 — 2024-01-07

- Fixed dark mode to have better visibility.
- Added high contrast assets.

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## More apps by Snappy Appz Inc.

- [Electrical Calc](https://appshunter.io/ios/app/electrical-calc/id375591374)
- [Construction Calc Lite](https://appshunter.io/ios/app/construction-calc-lite/id380648615)
- [Electrical Calc USA](https://appshunter.io/ios/app/electrical-calc-usa/id391412994)
- [Construction Calc Pro](https://appshunter.io/ios/app/construction-calc-pro/id458909118)
- [The Best No Smoking App](https://appshunter.io/ios/app/the-best-no-smoking-app/id458916516)
- [Electrical Calc Pro](https://appshunter.io/ios/app/electrical-calc-pro/id514793318)

All apps by Snappy Appz Inc.: https://appshunter.io/developer/375591377

## Related topics

[electrical box fill calculator](https://appshunter.io/ios/topics/electrical-box-fill-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 2026-08-27.*