A BPM to MS calculator converts tempo to delay and reverb times. A quarter note at 120 BPM is 500 ms. Dotted values multiply by 1.5. Triplets multiply by 2/3. Tap tempo averages the last eight intervals.
A quarter note is 60,000 / BPM. At 120 BPM that is 500 ms. An eighth note is 250 ms, a dotted quarter is 750 ms, and a quarter-note triplet is 333.33 ms. Delay plugins use these times for tempo-synced echoes.
2 Hz at this tempo
1/4 note
500 ms
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| 1/1 | 2,000 | 3,000 | 1,333.33 |
| 1/2 | 1,000 | 1,500 | 666.67 |
| 1/4 | 500 | 750 | 333.33 |
| 1/8 | 250 | 375 | 166.67 |
| 1/16 | 125 | 187.5 | 83.33 |
| 1/32 | 62.5 | 93.75 | 41.67 |
Results can be wrong. This calculator is unofficial. Figures can be incomplete, rounded, or not updated. Use them at your own risk and check a tape, datasheet, ball band, or official chart before cutting, mixing, buying, or publishing. Limits of liability are in the terms of service.
Each tap stores an interval. The average of the last eight intervals is converted with 60000 / ms.
Maps hertz to piano notes, cents, and MIDI at A4 = 440 or 432.
Transposes pasted chord sheets by semitones and shows a capo-friendly chart.
Estimates recording size from bitrate and duration, or bitrate from a target size.
Publisher notes · reviewed 29 October 2026
At 120 BPM a quarter note is 500 ms. Dotted ×1.5. Triplet ×2/3. Tap tempo averages the last eight intervals. LFO hertz is BPM/60.
Tempo-sync switches inside a plugin already do this. The chart is for unsynced echoes and analog delays.
120 BPM 1/8 dotted
250 × 1.5 = 375 ms.
