频率是每单位时间重复事件的发生数量。它是在赫兹（Hz）中测量的。
1 Hz = 60 rpm
1 rpm = 0.017 Hz
例子:
将15 赫兹转换为每分钟革命：
15 Hz = 900 rpm
| 赫兹 | 每分钟革命 |
|---|---|
| 0.01 Hz | 0.6 rpm |
| 0.1 Hz | 6 rpm |
| 1 Hz | 60 rpm |
| 2 Hz | 120 rpm |
| 3 Hz | 180 rpm |
| 5 Hz | 300 rpm |
| 10 Hz | 600 rpm |
| 20 Hz | 1,200 rpm |
| 30 Hz | 1,800 rpm |
| 40 Hz | 2,400 rpm |
| 50 Hz | 3,000 rpm |
| 60 Hz | 3,600 rpm |
| 70 Hz | 4,200 rpm |
| 80 Hz | 4,800 rpm |
| 90 Hz | 5,400 rpm |
| 100 Hz | 6,000 rpm |
| 250 Hz | 15,000 rpm |
| 500 Hz | 30,000 rpm |
| 750 Hz | 45,000 rpm |
| 1000 Hz | 60,000 rpm |
| 10000 Hz | 600,000 rpm |
| 100000 Hz | 6,000,000 rpm |
规则