Base Interval: The duration in milliseconds of one beat at your chosen note value and tempo. This is the click you hear from a standard metronome.
2× (Duplets): Two evenly spaced notes per beat — equivalent to eighth notes if your base is a quarter note.
3× (Triplets): Three evenly spaced notes per beat. Triplets are one of the most common subdivisions in jazz, blues, and classical music.
4× (Quadruplets): Four notes per beat — sixteenth-note feel against a quarter-note pulse.
5× and 6×: Quintuplets and sextuplets are advanced subdivisions used in progressive and contemporary music for polyrhythmic textures.
How This Calculator Works
You enter a tempo in BPM and select a base note value. The tool first computes the quarter-note duration as 60,000 ms ÷ BPM, then scales it by the note-value multiplier (×4 for whole, ×2 for half, ×1 for quarter, ÷2 for eighth, ÷4 for sixteenth). Each subdivision is simply the base interval divided by the subdivision count. All values are rounded to the nearest millisecond.
Quick Questions
Why is 60,000 used in the formula?
There are 60,000 milliseconds in one minute. Dividing 60,000 by BPM gives you the duration of one beat in milliseconds, which is the starting point for all subdivision calculations.
What is the difference between a triplet and a sextuplet?
A triplet divides one beat into 3 equal parts. A sextuplet divides it into 6 — effectively two triplets back to back. Sextuplets sound twice as fast as triplets at the same tempo.
How do I use these values with a DAW?
If your DAW lets you set delay or grid values in milliseconds, enter the subdivision interval directly. For example, a triplet delay at 120 BPM with a quarter-note base is 167 ms.
Can I use this for odd time signatures?
Yes. The calculator works with any BPM regardless of time signature. The base note value determines the subdivision reference — set it to match whatever note gets the beat in your time signature.