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# BPM to MS Calculator: Delay & Note Times
- URL: https://soundforgepro.com/bpm-to-ms-calculator/
- Published: 2026-08-27T18:01:34.000Z
- Updated: 2026-09-04T21:57:43.000Z
- Description: Convert a known tempo into straight, dotted, and triplet note times, or reverse a delay time back to BPM.
- Author: Erick Finn
- Tags: Audio Tools, Audio Fundamentals

Browser calculator · no upload

## Convert BPM to note times

Know the tempo? Enter it below. If not, find it first with [Tap Tempo](https://soundforgepro.com/tap-tempo/).

Quarter-note tempo 

BPM

6080100120128140174 

Quarter note**500.0 ms**60,000 ÷ BPM

One 4/4 bar**2.000 s**four quarter-note beats

Quarter rate**2.000 Hz**1,000 ÷ milliseconds

Click any value to copy

Copy table

| Note        | Straight | Dotted   | Triplet  |
| ----------- | -------- | -------- | -------- |
| 1/4 quarter | 500.0 ms | 750.0 ms | 333.3 ms |
| 1/8 eighth  | 250.0 ms | 375.0 ms | 166.7 ms |
| 1/16        | 125.0 ms | 187.5 ms | 83.33 ms |

More divisions: whole, half, 1/32, 1/64 

| 1/1 whole | 2000.0 ms | 3000.0 ms | 1333.3 ms |
| --------- | --------- | --------- | --------- |
| 1/2 half  | 1000.0 ms | 1500.0 ms | 666.7 ms  |
| 1/32      | 62.50 ms  | 93.75 ms  | 41.67 ms  |
| 1/64      | 31.25 ms  | 46.88 ms  | 20.83 ms  |

Reverse: milliseconds to BPM 

Delay time

ms

Note1/1 whole1/2 half1/4 quarter1/8 eighth1/161/321/64

FeelStraightDottedTriplet

Tempo**120.0 BPM**

Showing exact timing from a 120 BPM quarter-note pulse.

Values are calculated at full precision and rounded only for display.

**Quick answer:** divide 60,000 by a quarter-note BPM to get one quarter note in milliseconds. At 120 BPM, that is 500 ms; an eighth note is 250 ms, a dotted eighth is 375 ms, and an eighth-note triplet is about 166.67 ms.

## How to use the BPM to milliseconds calculator

1. **Enter the quarter-note tempo.** Type the BPM from the session, score, device, or pedal. The table updates without reloading the page.
2. **Choose the rhythmic column.** Straight values stay on the regular binary grid; dotted values last one and a half times as long; triplet values fit three notes into the time normally occupied by two.
3. **Copy the exact row you need.** Use milliseconds for an unsynced delay, reverb pre-delay, modulation period, gate, or another time control that accepts ms.
4. **Check the result in context.** Mathematical synchronization puts a repeat on the grid. It does not decide whether that repeat is too dense, too loud, or masking the next phrase.

If the song tempo is unknown, measure it first with our [Tap Tempo BPM counter](https://soundforgepro.com/tap-tempo/). That page estimates tempo from your taps; this calculator deliberately owns the separate conversion step after BPM is known.

## The BPM to ms formula

A minute contains 60,000 milliseconds. When the BPM number represents quarter-note beats, the duration of one quarter note is:

`quarter-note milliseconds = 60,000 ÷ BPM`

At 120 BPM, `60,000 ÷ 120 = 500 ms`. Halve that duration for an eighth note and halve it again for a sixteenth. Apple's [Logic Pro Delay Designer documentation](https://support.apple.com/guide/logicpro/use-sync-mode-lgcef18b94fb/mac) gives the same practical checkpoints: at 120 BPM, an eighth-note grid is 250 ms and a sixteenth-note grid is 125 ms.

![120 BPM converted to quarter, eighth, dotted eighth, and triplet eighth milliseconds](https://storage.ghost.io/c/af/4b/af4b05d4-2e0b-4edc-8378-1e2a62fecc70/content/images/2026/08/bpm-to-ms-timing-map-v1.webp)

At 120 BPM, one quarter note is 500 ms; the eighth-note, dotted-eighth, and triplet-eighth values follow from that pulse.

The calculator keeps full floating-point precision internally and rounds only the displayed value, so a copied 166.67 ms triplet isn't used as the starting point for another calculation.

## Straight, dotted, and triplet delay times

The straight column follows the ordinary note-duration tree: whole, half, quarter, eighth, sixteenth, thirty-second, and sixty-fourth. The [MusicTheory.net note-duration lesson](https://www.musictheory.net/lessons/11) shows the same power-of-two relationship. Starting from a 500 ms quarter note, the straight eighth is 250 ms and the straight sixteenth is 125 ms.

A dot adds half of the original note's duration, as the [Dots and Ties lesson](https://www.musictheory.net/lessons/14) explains. Therefore a dotted eighth at 120 BPM is `250 × 1.5 = 375 ms`. A triplet uses three notes in the time normally occupied by two; the [Dolmetsch note-grouping lesson](https://www.dolmetsch.com/musictheory15.htm) describes that three-in-the-time-of-two relationship. The calculator multiplies the straight note by exactly two-thirds.

Dotted and triplet aren't quality presets; they're different rhythmic placements. Copy the number, listen against the performance, and change the division when the repeats fight the groove or crowd the next transient.

## Convert milliseconds back to BPM

Open the reverse panel when a pedal, preset, or old project gives you a delay time but not its tempo. Select the note division and feel that the number represents; without those two pieces, one millisecond value can map to several valid tempos.

The inverse formula is:

`BPM = 60,000 × note multiplier × feel multiplier ÷ milliseconds`

For example, 375 ms is 160 BPM if treated as a straight quarter note, but it is 120 BPM when treated as a dotted eighth. The reverse control asks for both labels instead of guessing.

## Where the timing values are useful

Use the millisecond table when a delay pedal, hardware unit, or plugin is running in free-time mode rather than synchronizing directly to the project. Apple documents both approaches: [Logic's Note Repeater](https://support.apple.com/en-gb/guide/logicpro/lgce9c809354/mac) can use milliseconds when sync is off and bar/beat values when sync is on. If a plugin already follows tempo automation correctly, its sync mode is usually safer for a song that changes tempo.

The same period can be expressed as a rate in hertz with `1,000 ÷ milliseconds`. A 500 ms period repeats twice per second, so it's 2 Hz. That's useful when an LFO, tremolo, auto-pan, or filter exposes Hz instead of note values. The rate is calculated from the unrounded time.

Reverb needs more judgment. A [note-related pre-delay or decay](https://soundforgepro.com/bpm-delay-reverb-time-guide/) can be a repeatable starting point, but it is not automatically right for the arrangement. Shorten the time or reduce the wet level when consonants, drums, or the next phrase lose definition. For the actual desktop workflow, use the [Sound Forge reverb guide](https://soundforgepro.com/how-to-add-reverb-in-sound-forge-pro/); it covers selection, preview, tails, and verification rather than only the timing math.

## Quarter-note BPM, meter, and rounding limits

The page labels its assumption because BPM isn't always attached to a quarter note. The main table treats the entered number as quarter-note beats per minute, and the bar readout is specifically four quarter-note beats in 4/4\. Compound meters and scores with another beat unit need that beat interpretation resolved before the conversion is applied.

Don't treat the rounded display as proof of sample-accurate placement. A device may quantize delay time, a plugin may smooth parameter changes, and a performance can drift around the grid. If the job is changing the audio itself to a new duration or BPM, use the [time-stretch and pitch-shift workflow](https://soundforgepro.com/time-stretch-pitch-shift-sound-forge/) and verify the rendered file rather than assuming one delay-time number changes the recording.

## BPM to milliseconds FAQ

### What is the formula for BPM to milliseconds?

For quarter-note BPM, divide 60,000 by the BPM to get one quarter note in milliseconds. Multiply that result by the note value and then by 1.5 for dotted or two-thirds for triplet timing.

### How many milliseconds is 120 BPM?

At 120 quarter-note BPM, one quarter note is 500 ms, an eighth note is 250 ms, a sixteenth is 125 ms, and one 4/4 bar is 2,000 ms.

### What is a dotted eighth delay at 120 BPM?

A straight eighth at 120 BPM is 250 ms. A dot adds half of that value, so the dotted eighth is 375 ms.

### How do I convert milliseconds back to BPM?

Select what note and feel the millisecond value represents, then calculate 60,000 × note multiplier × feel multiplier ÷ milliseconds. For example, 375 ms as a dotted eighth returns 120 BPM.

### Is BPM to ms the same as tap tempo?

No. Tap tempo estimates BPM from the timing of your presses. BPM to ms starts with a known BPM and converts it into note durations for delay, reverb, modulation, or other timed controls.