BPM to Milliseconds Calculator
Convert a tempo in BPM to note durations in milliseconds and hertz for setting delay times and synced LFO rates, or convert a delay time in ms back to a tempo. Shows whole, half, quarter, eighth, sixteenth, and thirty-second notes with optional dotted and triplet variants. Pairs with the Note Frequency, Metronome, Tap Tempo, and Tone Generator tools. Everything runs locally in your browser.
Duration of a note in ms = beats × 60000 / BPM, where a quarter note is 1 beat (so a quarter note at 120 BPM = 500 ms). A dotted note is ×1.5 longer; a triplet is ×2/3 of the straight value. The hertz column is the repetition rate 1000 / ms (useful for syncing an LFO). The reverse mode solves BPM = beats × 60000 / ms for the chosen note value. Everything runs locally — nothing leaves your browser.