Revolutions Per Minute to Hertz
One revolution per minute equals 0.016667 hertz.
Hertz = revolutions per minute ÷ 60
Frequency Conversion
Common Frequencies
Frequency Reference Guide
Frequency Unit Relationships
1 kHz = 1,000 Hz
1 MHz = 1,000 kHz = 1,000,000 Hz
1 GHz = 1,000 MHz = 1,000,000,000 Hz
1 THz = 1,000 GHz = 10¹² Hz
1 RPM = 1/60 Hz ≈ 0.0167 Hz
1 RPS = 1 Hz
1 rad/s = 1/(2π) Hz ≈ 0.159 Hz
Angular frequency: ω = 2πf
Frequency Spectrum Applications
Audio Range: 20 Hz - 20 kHz (human hearing)
Radio Waves: 3 kHz - 300 GHz
AM Radio: 535 - 1605 kHz
FM Radio: 88 - 108 MHz
WiFi 2.4GHz: 2.4 - 2.485 GHz
WiFi 5GHz: 5.15 - 5.85 GHz
Microwave: 300 MHz - 300 GHz
Visible Light: ~400 - 800 THz
Technical Applications
CPU Clock: 1-5 GHz (modern processors)
AC Power: 50-60 Hz (mains electricity)
Musical Note A4: 440 Hz (concert pitch)
Ultrasound: >20 kHz (medical imaging)
Radar: 1-100 GHz (various bands)
X-rays: 30 PHz - 30 EHz (10¹⁶-10¹⁹ Hz)
Conversion Tips
• Period (T) and frequency (f) are reciprocals: T = 1/f
• Higher frequency = shorter wavelength (for electromagnetic waves)
• Angular frequency (ω) = 2π × frequency (f)
• Use scientific notation for very large or small frequencies
Revolutions Per Minute to Hertz Conversion Table
| RPM | Hz |
|---|---|
| 1 | 0.0167 |
| 10 | 0.1667 |
| 60 | 1 |
| 100 | 1.6667 |
| 300 | 5 |
| 600 | 10 |
| 750 | 12.5 |
| 1000 | 16.6667 |
| 1200 | 20 |
| 1500 | 25 |
| 1800 | 30 |
| 3000 | 50 |
| 3600 | 60 |
| 6000 | 100 |
| 7200 | 120 |
| 10000 | 166.6667 |
About This Conversion
Revolutions per minute to hertz divides by 60, since a hertz is one cycle per second and RPM counts cycles per minute. Rotating machinery is specified in RPM, while vibration analysis and drive electronics work in hertz.
Mains-driven machines cluster at predictable values. A two-pole motor on 50 Hz runs near 3,000 RPM and on 60 Hz near 3,600; four-pole versions halve those to 1,500 and 1,800. Those numbers are the electrical frequency showing through, which is why the same equipment spins differently on either side of the Atlantic.
Frequently Asked Questions
How many Hz is 60 RPM?
60 RPM is exactly 1 Hz, one revolution per second.
How many Hz is 3000 RPM?
3,000 RPM is 50 Hz.
What is the formula?
Divide RPM by 60 to get hertz. Multiply hertz by 60 for RPM.
Why do motors run at 1500 or 1800 RPM?
A four-pole motor turns at half the mains frequency: 1,500 RPM on 50 Hz supplies, 1,800 RPM on 60 Hz.