# Motor Start Current Calculator — Motor Start Current Calc

> Motor Start Current Calc (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/motor-start-current-calculator/id6761745666 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: English
- Released: 2026-04-08
- Data updated: 2026-07-08
- User reviews in markdown: https://appshunter.io/ios/app/motor-start-current-calculator/id6761745666/reviews.md

## What is Motor Start Current Calculator?

Sizing a breaker or wire for a new motor and need to know the inrush current before you pull the trigger? Enter HP, voltage, and phase to instantly compare starting methods and get breaker size and wire gauge per NEC 430 — so you spec it right the first time.

Enter motor HP, voltage, phase, efficiency, and power factor. Compare four starting methods side by side: DOL (6x FLA), Star-Delta (2x), Soft Starter (3x), and VFD (1.5x). Shows FLA, LRA, inrush kVA, recommended breaker size, and wire gauge per NEC Article 430.

FEATURES:
- Full load amps (FLA) calculation for single and three phase
- Locked rotor amps (LRA) for each start method
- Inrush kVA calculation
- NEC 430 breaker sizing recommendation
- Wire gauge suggestion per NEC ampacity tables
- Single phase and three phase support

Built for electricians, controls engineers, and maintenance technicians. Works offline.


## Version history (last 3 releases)

### 1.0.3 — 2026-07-01

Added a More Pro Tools section to discover related field calculators.

### 1.0.2 — 2026-04-14

Bug fixes and performance improvements.

### 1.0.1 — 2026-04-08

No release notes.

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All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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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 2026-07-08.*