Southwire® Conversion Calc vs Voltage Drop Calculator.
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.
Voltage Drop Calculator.
Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.
- NEC and IEC dual standards
- Voltage drop and wire sizing calculations
- Support for continuous load and corrections
- Copper or Aluminum conductor options
- Single-phase and three-phase systems
- Automatic compliance checks
- PDF report generation
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Perform accurate Voltage Drop and Wire Sizing calculations for both NEC® (National Electrical Code) and IEC standards. Built for electricians, engineers, and contractors who need reliable results on the go. Voltage Drop Calculator • Dual standards: Switch between NEC (AWG/Imperial) and IEC (mm²/Metric) • Enter voltage, current, run length, and power factor • Supports continuous load (125%), grouping, and ambient temperature corrections • Copper or Aluminum conductors for single-phase and three-phase systems • Detailed results including ampacity, derating, voltage drop, and load voltage • Automatic compliance checks (e.g., ≤ 3% for branch circuits) Wire Size Calculator (Reverse) • Calculates required wire size for a target voltage drop % • Suggests optimal AWG, kcmil, or mm² • Uses NEC Chapter 9, Table 9 (AC impedance) with DC fallback Professional Tools • Wire converter (AWG/kcmil ↔ mm²) • Generate and share PDF reports • Handy electrical formula cards • Localized in English, Spanish, French, German, Italian, Dutch, Portuguese, and Chinese
Screenshots
Verdict
The clearest difference is in-app purchases: Southwire® Conversion Calc at none against Voltage Drop Calculator.'s 1. Southwire® Conversion Calc also leads on ads (none vs shown). Voltage Drop Calculator.'s advantage is review sentiment (33% vs 0%) and rating (4.6 vs 4.2). On price, update cadence, device support and iOS requirement 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
Both are free to download. Voltage Drop Calculator. sells 1 one-off in-app purchase. Southwire® Conversion Calc asks for nothing beyond the download.
Voltage Drop Calculator. holds the better App Store score, 4.6 against 4.2. That said, the two scores are not equally well evidenced: Voltage Drop Calculator. has 410 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of Southwire® Conversion Calc's written reviews are positive against 33% of Voltage Drop Calculator.'s.
Southwire® Conversion Calc ships an update every 4 months, Voltage Drop Calculator. every 3 months. The most recent releases landed on August 28, 2026 and September 18, 2026 respectively.
| Parameter | Southwire® Conversion Calc | Voltage Drop Calculator. |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) | 4.6 (410 ratings) — better |
| Positive reviews | 0.0% of reviews | 33.3% of reviews — better |
| Number of ratings | 5 | 410 — better |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 7 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Southwire Company | V PUGAZHENTHI |
Customer experience
Southwire® Conversion Calc
Voltage Drop Calculator.
In-app purchases
Southwire® Conversion Calc
No in-app purchases
Voltage Drop Calculator.
- Go Pro$4.99
Questions
Is Southwire® Conversion Calc free?
Is Voltage Drop Calculator. free?
Which has better reviews, Southwire® Conversion Calc or Voltage Drop Calculator.?
Do Southwire® Conversion Calc or Voltage Drop Calculator. have ads?
Which is updated more often, Southwire® Conversion Calc or Voltage Drop Calculator.?
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