How to Calculate Motor RPM? Knowing motor speed is essential for engineers, technicians, and students working with motors, pumps, fans, and industrial machinery. Formula: RPM = (Frequency × 120) ÷ Number of Poles Example: Frequency = 60 Hz Poles = 4 RPM = (60 × 120) ÷ 4 = 1800 RPM Quick Tip: For a 50 Hz supply, common motor speeds are: • 2 Pole ≈ 3000 RPM • 4 Pole ≈ 1500 RPM • 6 Pole ≈ 1000 RPM • 8 Pole ≈ 750 RPM Save this post for future reference and share it Post navigation Battery Capacity (mAh) Explained Simply! Modular Timer Relay with OFF-Delay Function
