How do you convert milliseconds to BPM?

Divide 60,000 by the millisecond value, treating that value as the length of one quarter-note beat. A 500 ms beat is 120 BPM and a 375 ms beat is 160 BPM.

How do I find the BPM of a sample loop?

Measure the loop length in milliseconds, count how many beats it spans, and divide the length by the beats to get the per-beat time. Then divide 60,000 by that per-beat figure. A 2,000 ms one-bar 4/4 loop is 120 BPM.

When would I convert ms to BPM?

When a delay unit, sample length, or loop gives you a millisecond value and you need the tempo behind it — for matching a sample to a session, or reverse-engineering a delay setting from a reference track.

What is the difference between ms to BPM and BPM to ms?

They are inverses. BPM to ms turns a tempo into note-length times for effects; ms to BPM turns a measured time back into a tempo. Both use the constant 60,000 milliseconds in a minute.

ms to BPM: Find Tempo From Milliseconds

ArtyphonicJune 13, 20263 min read

To convert milliseconds to BPM, divide 60,000 by the millisecond value — when that value is the length of one quarter note. A 500 ms beat is 120 BPM; a 375 ms beat is 160 BPM. If your millisecond figure is a different note value, account for that first.

The formula

A minute is 60,000 milliseconds, so the number of quarter-note beats per minute is 60000 ÷ (ms per beat). The whole conversion is that one division — the only trick is making sure the millisecond value you start with really is one beat.

Milliseconds	BPM
1000	60
600	100
500	120
469	128
375	160
345	174

A looped waveform measured with a millisecond ruler to find its tempo — Measure the loop, divide its length by the beats it holds, then convert the per-beat time to BPM.

Finding the BPM of a loop or sample

A loop rarely lasts exactly one beat — it is usually one, two, or four bars. So measure its full length in milliseconds, work out how many beats it contains, and divide to get the per-beat time before converting.

Measure the loop length in milliseconds.
Count the beats it spans — a one-bar 4/4 loop is 4 beats, two bars is 8.
Divide: loop length ÷ beats = milliseconds per beat.
60000 ÷ ms-per-beat = BPM.

The formula

Finding the BPM of a loop or sample

The reverse: BPM to ms