Question 1

How many milliseconds is 120 BPM?

Accepted Answer

A quarter note at 120 BPM is 500 ms. An eighth note is 250 ms, and a sixteenth note is 125 ms.

Question 2

How do I convert milliseconds back to BPM?

Accepted Answer

Divide 60,000 by the millisecond value of a quarter note. If you measured an eighth-note delay of 300 ms, first find the quarter note (600 ms), then calculate BPM = 60,000 ÷ 600 = 100 BPM.

Question 3

What is the formula for BPM to milliseconds?

Accepted Answer

Quarter note ms = 60,000 ÷ BPM. For any other note value, multiply or divide the quarter note result according to the standard note relationships, for example, eighth note = quarter note ÷ 2.

Question 4

Why do different calculators sometimes show different results?

Accepted Answer

In our testing, discrepancies were most commonly caused by different calculators using different note-value assumptions rather than mathematical errors in the conversion itself.

Question 5

Does this conversion work for time signatures like 3/4, 6/8, or 2/2?

Accepted Answer

Yes, but you must first identify what the BPM number represents. In 3/4, the beat is still a quarter note. In 6/8, the BPM typically refers to a dotted quarter. In 2/2 (cut time), it's a half note. Adjust your starting reference accordingly, then apply the standard subdivisions.

Question 6

What is the best delay time for a vocal slapback?

Accepted Answer

Slapback typically falls between 40 ms and 120 ms, which corresponds to a 1/32 to 1/16 note at most tempos. Use your tempo chart to find the exact value that sits right with the track.