Delay Time Note Value Calculator
Sometimes you have a delay time in milliseconds, from a preset, a pedal readout, or measured by ear, and you want to know which musical note value it represents at your tempo. The conversion is the reverse of tempo-to-delay: divide the delay time by the beat length (60,000 divided by the tempo) to get the number of beats, then scale to eighths and sixteenths. This calculator returns the delay expressed in quarter notes, eighth notes, sixteenth notes, and beats per bar, so you can tell whether a setting is locked to the groove or drifting, and round it to the nearest clean subdivision.
Note value formula
Beat length = 60000 / BPM (ms)
Quarter notes = delay time / beat length
Eighth notes = quarter notes * 2
Sixteenth notes = quarter notes * 4
A quarter note equals one beat in common time. A result of 0.75 quarter notes is a dotted eighth; 0.5 is a plain eighth; 0.25 is a sixteenth.
Reading delay times in context
- At 120 BPM, 375 ms equals 0.75 of a quarter note, a dotted eighth.
- Whole-number results sit exactly on a beat; clean fractions sit on a subdivision.
- Values far from any simple fraction are free-running and will drift against the beat.
- Round to the nearest clean division to lock a borrowed delay to your track.
- This is the inverse of the tempo-to-delay-time conversion.
Delay note value: frequently asked questions
How do I find the note value of a delay time?
Divide the delay time in milliseconds by the length of a beat, which is 60,000 divided by the tempo. The result is how many beats, or quarter notes, the delay spans. Multiply by two for eighth notes or four for sixteenths to see the delay in those subdivisions.
Why would I work backwards from a delay time?
You may have a delay set by ear or copied from a preset and want to know whether it lines up with the beat. This tells you the note value it currently matches, so you can decide to keep it, round it to the nearest clean division, or adjust the tempo to fit.
What if the result is not a whole note value?
A non-integer means the delay does not fall exactly on a musical subdivision. A value of 0.75 quarter notes, for example, is a dotted eighth. Values near a simple fraction are close to that division; far-off values are free-running and will drift against the beat.
How is this different from converting tempo to delay?
Converting tempo to delay starts from a note value and gives a time in milliseconds. This calculator does the reverse: it starts from a known delay time and tempo and tells you the note value. Together the two cover both directions of the same relationship.
Does this work for any tempo?
Yes, for any positive tempo. The beat length is always 60,000 milliseconds divided by the tempo, so the conversion holds whether the track is slow or fast. Enter the actual delay time your unit reports for an accurate reading.
Official sources
- UNSW School of Physics: Music acoustics.
- MIDI Association: MIDI tempo and timing specification.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. See our methodology.