Southwire® Conversion Calc vs Box Fill 2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Southwire® Conversion Calc
This utility app facilitates conversions between copper and aluminum electrical wiring. It allows users to calculate pricing, unit of measure, conversion factors, and weight based on product length. The app comes preloaded with numerous cable types for easy calculation.
- Copper to aluminum conversion
- Aluminum to copper conversion
- Pricing unit of measure calculation
- Conversion factor calculation
- Weight per product length calculation
- Preloaded cable data
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Southwire's Conversion Calculator helps to convert copper to aluminum or aluminum to copper, pricing unit of measure, conversion factor and weight per product length. Preloaded with many cables for calculation.
Box Fill 2
This utility app helps electricians and contractors perform precise electrical box fill calculations according to the latest codes. It also includes a comprehensive construction calculator for dimensional math, area, volume, and right-angle solutions.
- 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
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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.
Screenshots
Verdict
The clearest difference is price: Southwire® Conversion Calc at Free against Box Fill 2's $3.99. Southwire® Conversion Calc also leads on rating (4.2 vs 3.3) and iOS requirement (16.6 vs 26.0). Box Fill 2's advantage is review sentiment (33% vs 0%) and update cadence (every 5 weeks vs every 4 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Southwire® Conversion Calc is free to download; Box Fill 2 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Southwire® Conversion Calc holds the better App Store score, 4.2 against 3.3. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews complicate that: 0% of Southwire® Conversion Calc's written reviews are positive against 33% of Box Fill 2's, so the app with the better star average is not the one people write more warmly about.
Southwire® Conversion Calc ships an update every 4 months, Box Fill 2 every 5 weeks. The most recent releases landed on August 28, 2026 and August 27, 2026 respectively.
| Parameter | Southwire® Conversion Calc | Box Fill 2 |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.2 (5 ratings) — better | 3.3 (3 ratings) |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | 5 — better | 3 |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 7 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Southwire Company | Snappy Appz Inc. |
Customer experience
Southwire® Conversion Calc
Box Fill 2
In-app purchases
Southwire® Conversion Calc
No in-app purchases
Box Fill 2
No in-app purchases
Questions
Is Southwire® Conversion Calc free?
Is Box Fill 2 free?
Which has better reviews, Southwire® Conversion Calc or Box Fill 2?
Do Southwire® Conversion Calc or Box Fill 2 have ads?
Which is updated more often, Southwire® Conversion Calc or Box Fill 2?
Other comparisons
