120 BPM in milliseconds
At 120 BPM one beat lasts 500.0 ms, which is 2 beats per second. One bar of 4/4 takes 2 seconds.
Allegro usually means about 120–167 BPM.
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| Whole | 2,000.0 | 3,000.0 | 1,333.3 |
| Half | 1,000.0 | 1,500.0 | 666.7 |
| Quarter | 500.0 | 750.0 | 333.3 |
| Eighth | 250.0 | 375.0 | 166.7 |
| 16th | 125.0 | 187.5 | 83.3 |
| 32nd | 62.5 | 93.8 | 41.7 |