# HAK Cable Size Estimator — Cable sizing, voltage drop > Power cable sizing and voltage drop estimation tool for engineers. (iPhone/iPad app by Damaris Koehler.) - Source: https://appshunter.io/ios/app/hak-cable-size-estimator/id6751930298 (this page in markdown: same URL + `.md`) - Developer: [Damaris Koehler](https://appshunter.io/developer/1835293728) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 18.0 · 3 MB - Languages: American English, French (France), German (Germany), Hindi, Italian, Japanese, European Portuguese, Chinese (Simplified, China), European Spanish - Released: 2025-09-30 - Data updated: 2026-06-01 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/hak-cable-size-estimator/id6751930298/reviews.md ## What is HAK Cable Size Estimator? HAK Cable Size Estimator helps engineers right‑size power cables quickly and confidently. Highlights Ampacity‑based selection with ambient, grouping, and installation reduction factors (offline tables). Voltage drop using R‑only or R+X, with temperature correction, frequency input, and power factor. Systems & materials: single‑ or three‑phase; copper or aluminum; built‑in AWG/MCM data. Parallel runs: evaluate single run or search for multi‑run solutions when needed. Motor helper: choose kW & IE class to auto‑estimate current (with optional 1.25× FLA). Fast, offline calculations; 8 languages supported. How it works Enter load (or use Motor helper). Set environment: temperature, grouping, installation. (Optional) Enable R+X and voltage‑drop constraint. Get the smallest cable that meets your constraints—single or parallel runs—plus a concise math trace. Free vs Premium Free: Ampacity sizing, reduction factors, manual parallel runs, presets, motor helper. Premium (HAK Pro): Voltage‑drop constraint check (R or R+X), automatic parallel‑run search, frequency input for R+X. Disclaimer Results are for preliminary sizing. Always verify against your project’s governing standard and manufacturer data. “NEC” and “National Electrical Code®” are referenced for context; this app is not endorsed by NFPA. What’s New (1.1.8) Initial release with ampacity sizing (reduction factors), R+X voltage‑drop, parallel runs, motor assistant, and multi‑language UI. Fixed Subscription issues, added links to EULA and Privacy in binary, also added Eula in app description. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Ampacity-based cable sizing - Voltage drop calculation (R-only or R+X) - Support for single and three-phase systems - Copper and aluminum conductor data - Automatic parallel run evaluation - Motor current estimation helper - Offline calculations ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | HAK Pro - 1 Month | $3.99 | per month | | HAK Pro - 6 Months | $19.99 | per 6 months | | HAK Pro - 1 Year | $34.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | HAK Pro - Lifetime | $44.99 | one-time | ## Frequently asked questions about HAK Cable Size Estimator ### What is HAK Cable Size Estimator? HAK Cable Size Estimator is a utility application designed to help engineers quickly and accurately determine the appropriate size for power cables. It calculates ampacity and voltage drop, considering various environmental and system factors. ### What features are available in the free version of HAK Cable Size Estimator? The free version includes ampacity sizing, reduction factors, manual parallel runs, presets, and a motor helper. Users can perform basic cable sizing and estimations without cost. ### What are the benefits of upgrading to HAK Pro? Upgrading to HAK Pro unlocks advanced features such as voltage-drop constraint checks (R or R+X), automatic parallel-run search, and frequency input for R+X calculations. These premium features offer more comprehensive analysis for complex projects. ### Does HAK Cable Size Estimator offer a free trial for HAK Pro? Yes, HAK Cable Size Estimator offers a 7-day free trial for its HAK Pro subscription. This allows users to explore the premium features before committing to a paid plan. ### On which devices can I use HAK Cable Size Estimator? HAK Cable Size Estimator is available for iPhone and iPad devices. It is designed to provide a seamless experience across Apple's mobile platforms. ### How often is HAK Cable Size Estimator updated? The app was last updated on October 7, 2025, with version 1.1.9. Updates typically include bug fixes, performance improvements, and potentially new features based on user feedback and evolving standards. ### Is HAK Cable Size Estimator suitable for beginners? While the app is targeted at engineers, its intuitive interface and offline calculation capabilities can assist users in understanding cable sizing principles. The 'Motor helper' feature can also simplify initial current estimations. ### What is the age rating for HAK Cable Size Estimator? HAK Cable Size Estimator has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions. ## Version history (last 2 releases) ### 1.1.9 — 2025-10-07 New version for fixed In-App Purchases and Subscriptions ### 1.1.8 — 2025-09-30 No release notes. ## More apps by Damaris Koehler - [The Zoo ABC](https://appshunter.io/ios/app/the-zoo-abc/id6751908944) All apps by Damaris Koehler: https://appshunter.io/developer/1835293728 ## Related topics [cable sizing](https://appshunter.io/ios/topics/cable-sizing) --- *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 2026-06-01.*