42 BPM in milliseconds
At 42 BPM one beat lasts 1,428.6 ms, which is 0.7 beats per second. One bar of 4/4 takes 5.71 seconds.
Largo usually means about 40–59 BPM.
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| Whole | 5,714.3 | 8,571.4 | 3,809.5 |
| Half | 2,857.1 | 4,285.7 | 1,904.8 |
| Quarter | 1,428.6 | 2,142.9 | 952.4 |
| Eighth | 714.3 | 1,071.4 | 476.2 |
| 16th | 357.1 | 535.7 | 238.1 |
| 32nd | 178.6 | 267.9 | 119.0 |