AC Motor Speed Calculator
Compute synchronous speed from supply frequency and pole count. Optionally estimate induction motor full‑load speed using slip.
— rpm
Synchronous speed \(N_s = 120·f / p\)
Quick reference (auto‑updates)
| Poles | 50 Hz (rpm) | 60 Hz (rpm) |
|---|
Notes: Synchronous machines (wound‑field/PM) run at the exact synchronous speed. Induction machines run slightly below \(N_s\); slip varies by load and design.