40 BPM in numbers
| One beat (quarter note) | 1500 ms |
| Eighth note | 750 ms |
| Dotted eighth | 1125 ms |
| Sixteenth note | 375 ms |
| One bar of 4/4 | 6 s |
| Beats per second | 0.67 |
| Bars of 4/4 in one minute | 10 |
The classical tempo marking for 40 BPM is Largo (see the tempo markings chart). 40 BPM isn't the home tempo of any one big genre, which makes it a good practice tempo with no style attached. Counted in double-time it's 80 BPM, the pace of ballads and slow R&B.
As a resting heart rate, 40 BPM is below the usual adult range of 60 to 100, which is common and healthy in fit people but worth mentioning to a doctor if you feel dizzy or tired. To measure your own, use the heart rate counter.
Every delay length at 40 BPM, including triplets, is in the BPM to ms calculator. Not sure your song is really at 40? Tap along to check.