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BPM to MS Calculator
Turn any tempo into note lengths in milliseconds for tempo-synced delays, reverbs, compressors and LFOs. See every note value from whole notes to 1/64, straight, dotted and triplet, plus the frequency in Hz, the bar length and samples.
BPM
Enter your values to see the result.
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How to use the BPM to MS Calculator
- Enter the tempo of your song in BPM (use the BPM Finder if you don't know it).
- Read the quarter-note delay time and the common delay values.
- Use the table to find any note length, dotted or triplet, in ms or Hz.
- Set the time signature to get the exact bar length.
- Pick a sample rate if you need delay times in samples.
The BPM to ms formula
Quarter note (ms) = 60,000 ÷ BPM
- Half note = quarter × 2, whole note = quarter × 4
- Eighth = quarter ÷ 2, sixteenth = quarter ÷ 4, 1/32 = quarter ÷ 8
- Dotted = straight × 1.5 and triplet = straight × ⅔
- Hz = 1000 ÷ ms; samples = ms ÷ 1000 × sample rate
Example at 128 BPM: 60,000 ÷ 128 = 468.75 ms per quarter note, 234.38 ms per eighth, 351.56 ms for a dotted eighth and 2.133 Hz for a quarter-note LFO.
Delay time chart (milliseconds)
| BPM | 1/4 | 1/8 | Dotted 1/8 | 1/8 triplet | 1/16 | 1/4 in Hz |
|---|---|---|---|---|---|---|
| 60 | 1000.00 | 500.00 | 750.00 | 333.33 | 250.00 | 1.000 |
| 70 | 857.14 | 428.57 | 642.86 | 285.71 | 214.29 | 1.167 |
| 80 | 750.00 | 375.00 | 562.50 | 250.00 | 187.50 | 1.333 |
| 90 | 666.67 | 333.33 | 500.00 | 222.22 | 166.67 | 1.500 |
| 100 | 600.00 | 300.00 | 450.00 | 200.00 | 150.00 | 1.667 |
| 110 | 545.45 | 272.73 | 409.09 | 181.82 | 136.36 | 1.833 |
| 120 | 500.00 | 250.00 | 375.00 | 166.67 | 125.00 | 2.000 |
| 128 | 468.75 | 234.38 | 351.56 | 156.25 | 117.19 | 2.133 |
| 140 | 428.57 | 214.29 | 321.43 | 142.86 | 107.14 | 2.333 |
| 150 | 400.00 | 200.00 | 300.00 | 133.33 | 100.00 | 2.500 |
| 160 | 375.00 | 187.50 | 281.25 | 125.00 | 93.75 | 2.667 |
| 174 | 344.83 | 172.41 | 258.62 | 114.94 | 86.21 | 2.900 |
Using tempo-synced times in a mix
- Vocal slap delay: very short times (60–120 ms or a 1/32) thicken a vocal without an obvious echo.
- Rhythmic delay: 1/8, dotted 1/8 and 1/4 delays lock to the groove; dotted values create a bouncing pattern against straight parts.
- Compressor release: setting release near a 1/8 or 1/16 note helps the compressor breathe with the beat.
Frequently asked questions
How do I convert BPM to milliseconds?
Divide 60,000 by the tempo. The result is the length of one beat (a quarter note in 4/4) in milliseconds. At 120 BPM a quarter note lasts 60,000 ÷ 120 = 500 ms, an eighth note 250 ms and a sixteenth note 125 ms.
What is a dotted note delay?
A dotted note is 1.5 times as long as the straight note. The dotted eighth delay, made famous by many rock and pop guitar sounds, is three sixteenths long: at 120 BPM it is 375 ms.
How long is a triplet note?
A triplet fits three notes in the space of two, so each triplet note is ⅔ of the straight note. At 120 BPM an eighth-note triplet lasts 166.67 ms.
How do I set reverb pre-delay to tempo?
A common approach is to set pre-delay to a short note value such as a 1/64 or 1/128 note, which separates the dry sound from the reverb in time with the song, and to set the decay so the tail fades out within a half note or one bar.
How do I convert BPM to Hz?
Divide 1000 by the note length in milliseconds, or divide the BPM by 60 for quarter notes. At 120 BPM a quarter note is 2 Hz and a sixteenth note 8 Hz, useful for syncing LFOs, tremolo and auto-pan rates.
Why do delay plugins have a sync option?
Tempo sync calculates these same values automatically from your project tempo. Knowing the numbers is still useful for hardware units, plugins without sync, compressor release times and gates.
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