Revolutions per Minute to Hertz
One revolution per minute equals 0.016667 hertz.
Hertz = revolutions per minute ÷ 60
By Piero Nanni · Last checked
Revolutions per Minute to Hertz Calculator
How to Convert Revolutions per Minute to Hertz
Formula:
Hertz = revolutions per minute ÷ 60
Worked example:
1200 revolutions per minute ÷ 60 = 20 hertz
Revolutions per Minute to Hertz Conversion Table
| RPM | Hz |
|---|---|
| 1 | 0.0167 |
| 2 | 0.0333 |
| 2.5 | 0.0417 |
| 5 | 0.0833 |
| 7.5 | 0.125 |
| 10 | 0.1667 |
| 20 | 0.3333 |
| 25 | 0.4167 |
| 50 | 0.8333 |
| 60 | 1 |
| 75 | 1.25 |
| 100 | 1.6667 |
| 200 | 3.3333 |
| 250 | 4.1667 |
| 300 | 5 |
| 500 | 8.3333 |
| 600 | 10 |
| 750 | 12.5 |
| 1000 | 16.6667 |
| 1200 | 20 |
| 1500 | 25 |
| 1800 | 30 |
| 2000 | 33.3333 |
| 2500 | 41.6667 |
| 3000 | 50 |
| 3600 | 60 |
| 5000 | 83.3333 |
| 6000 | 100 |
| 7200 | 120 |
| 7500 | 125 |
| 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.