90 BPM in Milliseconds: Delay Times and Note Lengths
At 90 BPM one beat (a quarter note) lasts 666.667 ms and one bar of 4/4 lasts 2.667 seconds. Below are the delay times for every note value, the same notes in Hz, bar and phrase lengths, samples per beat and the genres that typically sit at this tempo.
90 BPM at a glance
- One beat at 90 BPM lasts about 666.67 ms (60,000 divided by 90), an eighth note about 333.33 ms and a dotted eighth 500 ms.
- A beat here is not a whole number of milliseconds. The nearest tempo where it is: 96 BPM, with 625 ms per beat.
- At both 44.1 kHz and 48 kHz a beat is a whole number of samples (29,400 and 32,000), so loops cut on the beat line up exactly at either rate.
- A 4 bar phrase in 4/4 takes about 10.667 seconds, and 3 minutes of music at this tempo holds 67.5 bars of 4/4.
- Going from 90 to 91 BPM shortens each beat by 7.326 ms, about 1.1% of the beat.
- An LFO synced to quarter notes runs at 1.5 Hz; synced to whole bars of 4/4 it runs at 0.375 Hz.
Delay times at 90 BPM
Milliseconds for each note value. Dotted notes are 1.5 times as long, triplets 2/3 as long. Rounded to 2 decimals.
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| Whole note (1/1) | 2,666.67 ms | 4,000 ms | 1,777.78 ms |
| Half note (1/2) | 1,333.33 ms | 2,000 ms | 888.89 ms |
| Quarter note (1/4) | 666.67 ms | 1,000 ms | 444.44 ms |
| Eighth note (1/8) | 333.33 ms | 500 ms | 222.22 ms |
| Sixteenth note (1/16) | 166.67 ms | 250 ms | 111.11 ms |
| 1/32 note | 83.33 ms | 125 ms | 55.56 ms |
| 1/64 note | 41.67 ms | 62.5 ms | 27.78 ms |
90 BPM in Hz for LFOs
The rate that repeats once per note, for an LFO, tremolo or auto pan synced to 90 BPM. Rounded to 3 decimals.
| Note | Straight | Dotted | Triplet |
|---|---|---|---|
| Whole note (1/1) | 0.375 Hz | 0.25 Hz | 0.563 Hz |
| Half note (1/2) | 0.75 Hz | 0.5 Hz | 1.125 Hz |
| Quarter note (1/4) | 1.5 Hz | 1 Hz | 2.25 Hz |
| Eighth note (1/8) | 3 Hz | 2 Hz | 4.5 Hz |
| Sixteenth note (1/16) | 6 Hz | 4 Hz | 9 Hz |
| 1/32 note | 12 Hz | 8 Hz | 18 Hz |
| 1/64 note | 24 Hz | 16 Hz | 36 Hz |
Bar lengths at 90 BPM
| 1 bar of 4/4 | 2.667 s |
| 2 bars of 4/4 | 5.333 s |
| 4 bars of 4/4 | 10.667 s |
| 8 bars of 4/4 | 21.333 s |
| 16 bars of 4/4 | 42.667 s |
| 32 bars of 4/4 | 85.333 s |
| 1 bar of 3/4 | 2 s |
| 1 bar of 6/8 | 2 s |
| 1 bar of 7/8 | 2.333 s |
| 1 bar of 5/4 | 3.333 s |
Samples per beat at 90 BPM
| Rate | Per beat | Per 4/4 bar |
|---|---|---|
| 44.1 kHz | 29,400 | 117,600 |
| 48 kHz | 32,000 | 128,000 |
| 96 kHz | 64,000 | 256,000 |
Sample rate times 60, divided by 90.
What music is 90 BPM?
Relaxed (80 to 99 BPM). This is a relaxed, head nodding tempo. A lot of hip hop, R&B and laid back grooves sit in this range, where the gap between beats leaves space for swing, ghost notes and vocal phrasing.
Typical tempo ranges that include 90 BPM: Reggae, R&B, Downtempo and trip hop, Lofi hip hop, Hip hop, Reggaeton.
Half time: 45 BPM, slower than the genre ranges listed here. Double time: 180 BPM, in the typical range of Drum and bass, Punk, Hardcore techno and gabber.
A track can be written at one tempo and felt at the other, so a song at 90 BPM may be counted as 45 or 180 in a DAW or DJ software. Ranges are typical only; plenty of songs sit outside them.
Work at 90 BPM
The BPM and Delay Time Calculator does this math for any tempo, including decimals, with tap tempo and milliseconds back to BPM. All free, in your browser.
Nearby tempos
Questions about 90 BPM
How many milliseconds is a beat at 90 BPM?
A quarter note beat at 90 BPM lasts about 666.67 ms, which is 60,000 divided by 90. An eighth note is about 333.33 ms and a sixteenth note is about 166.67 ms.
What delay time should I use at 90 BPM?
For a quarter note echo set about 666.67 ms, for a dotted eighth set 500 ms and for an eighth note triplet set about 222.22 ms. If your delay has a tempo sync mode, picking the note value there gives the same timing.
How long is one bar at 90 BPM?
One bar of 4/4 at 90 BPM lasts about 2.667 seconds, so 8 bars take about 21.333 seconds and 16 bars take about 42.667 seconds. A bar of 3/4 lasts 2 seconds.
Is 90 BPM fast or slow?
Relaxed (80 to 99 BPM). Typical ranges that include 90 BPM: Reggae, R&B, Downtempo and trip hop, Lofi hip hop, Hip hop, Reggaeton. Half time is 45 BPM and double time is 180 BPM.