About this app
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.
Latest release
What’s New
Added a More Pro Tools section to discover related field calculators.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Oct 2, 2026 · 7:51 PM $4.99
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