Another metric to think about if you care about rhythm. In a 4/4 beat at 120 BPM with 50% swing (i.e. straight 16th notes with no swing), sixteenth notes are 12

Another metric to think about if you care about rhythm. In a 4/4 beat at 120 BPM with 50% swing (i.e. straight 16th notes with no swing), sixteenth notes are 125ms apart. Each percent of swing is 2.5ms. So if you increase to 51% swing, it's 127.5ms and 122.5ms between successive pairs of 26th notes. 55% swing (which is very distinct from 50% to my ears) is 137.5ms and 112.5ms.