BPM means beats per minute. It describes how quickly the pulse repeats, not how many notes you play. Find a usable pulse first, then decide how fast you want to practise.
Find a tempo by tapping
Listen until you can feel a recurring beat, then tap along for several bars in the tap-tempo tool. Keep tapping the same pulse rather than following every note or drum hit. Repeat the measurement when the estimate is unstable.
Check half-time and double-time
The same recording may feel natural at 70 BPM or 140 BPM depending on which pulse you count. Neither number alone tells you the intended beat unit. Count a phrase and see which interpretation gives you useful bars and accents.
Convert beats to time
One beat lasts 60,000 divided by BPM milliseconds. At 120 BPM a quarter-note beat lasts 500 milliseconds; at 60 BPM it lasts one second. Two evenly spaced eighth notes fit inside each quarter-note beat.
Choose a practice tempo
Matching a recording’s tempo is not the same as choosing a good learning tempo. Slow the passage until the changes are controlled, then work upward in small steps. Use the metronome to check the pulse after measuring it.
Practise at a common tempo
Each tempo page opens the metronome at that speed, lists note lengths in milliseconds and links drum grooves that sit near it. Start with 60 BPM for slow control, 90 to 100 BPM for most new material, and 120 BPM and above once a passage is secure.