🥁 BPM Tempo Calculator
Enter a tempo in beats per minute to see how long each note lasts in milliseconds — quarter, eighth, half, and whole — for setting delay times or checking a metronome.
🥁 Convert Tempo to Note Lengths
What is a BPM Tempo Calculator?
It translates a musical tempo into clock time. Give it a beats-per-minute value and it returns the duration of a quarter, eighth, half, and whole note in milliseconds, with the quarter note taking the beat as in common time.
Useful for dialling in tempo-synced delay and echo, building click tracks, checking a metronome, or just understanding how fast a marked tempo really is. Enter your BPM and read the durations straight off.
❓ Frequently Asked Questions
How does the BPM tempo calculator work?
Enter a tempo in beats per minute and it converts it into note durations in milliseconds. A quarter note gets the beat, so at 120 BPM a quarter note lasts 500 ms; the tool also gives eighth, half, and whole note lengths derived from the same tempo.
What is BPM?
BPM stands for beats per minute — how many beats occur in one minute of music. A higher BPM means a faster tempo. In 4/4 time the quarter note usually gets the beat, so 60 BPM is one quarter note per second and 120 BPM is two.
Why convert tempo to milliseconds?
Millisecond note lengths are handy for setting delay and echo times on effects so they lock to the tempo, for programming click tracks and sequencers, and for checking a metronome against a stopwatch. It's a bridge between musical tempo and clock time.
Do these durations assume a time signature?
They assume the quarter note gets the beat, as in 4/4 and similar meters. In compound or other meters the beat may fall on a different note value, but the millisecond figures for each note length still hold for the tempo you enter.