137 BPM in milliseconds
At 137 BPM one beat lasts 438.0 ms, which is 2.28 beats per second. One bar of 4/4 takes 1.75 seconds.
Allegro usually means about 120–167 BPM.
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| Whole | 1,751.8 | 2,627.7 | 1,167.9 |
| Half | 875.9 | 1,313.9 | 583.9 |
| Quarter | 438.0 | 656.9 | 292.0 |
| Eighth | 219.0 | 328.5 | 146.0 |
| 16th | 109.5 | 164.2 | 73.0 |
| 32nd | 54.7 | 82.1 | 36.5 |