BPM to milliseconds calculator

Set delays to note lengths so echoes fall in time with the music.

Your answer

Quarter note500 ms

Quarter notes per second	2 Hz

Note lengths (ms)
Note	Straight	Dotted	Triplet
Whole	2,000	3,000	1,333.33
Half	1,000	1,500	666.67
Quarter	500	750	333.33
Eighth	250	375	166.67
Sixteenth	125	187.5	83.33
Thirty-second	62.5	93.75	41.67

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How we worked it out

Updated as you change the numbers.

Quarter note (ms) = 60,000 ÷ BPM. Dotted = × 1.5; triplet = × 2/3.

Method and assumptions

BPM counts quarter notes per minute in common time.

Questions

How many milliseconds is a quarter note at 120 BPM?

500 ms; an eighth note is 250 ms.

Sources

NIST Handbook 44, Appendix C: unit conversions

Method and figures checked on October 31, 2026. Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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