90 BPM to MS: Delay Time Chart

Every delay time, LFO rate and reverb pre-delay at 90 BPM, the tempo of hip-hop, reggae and mid-tempo pop, straight, dotted and triplet.

Updated October 13, 2026 · By Niraj Kumar

Tempo

BPM

↑ ↓ nudge by 1, with Shift by 0.1. One beat = 666.67 ms.

Delay times · click to copy

Note	Straight	Dotted	Triplet
2 bars
1/1 (bar)
1/2
1/4
1/8
1/16
1/32
1/64

Reverb pre-delay & decay

Hall1/64 + tail to 2 bars

Pre-delay
Decay
Total

Large room1/128 + tail to 1 bar

Pre-delay
Decay
Total

Small room1/256 + tail to 1/2

Pre-delay
Decay
Total

Tight ambience1/512 + tail to 1/4

Pre-delay
Decay
Total

A starting point: shorten the decay until the tail stops masking the next phrase.

Bar & sample length

Time signature

Bars

Sample rate

Milliseconds

Seconds

Samples

Delay time → BPM

Delay time

Heard as

Feel

90 BPM

How long is a beat at 90 BPM?

At 90 BPM a quarter note lasts 666.67 ms (60,000 ÷ 90). An eighth is 333.33 ms, a dotted eighth 500 ms, a sixteenth 166.67 ms and a sixteenth triplet 111.11 ms. A one-beat LFO runs at 1.5 Hz, and one 4/4 bar lasts 2,666.67 ms.

quarter note (ms) = 60 000 ÷ BPM;  note = quarter × q;
dotted = note × 1.5;  triplet = note × 2/3;  rate (Hz) = 1000 ÷ ms;
bar = quarter × beats × 4 ÷ unit;  samples = seconds × sample rate

This page uses the same method as the BPM to MS Calculator, which explains each term and assumption in full.

Delay times and LFO rates at 90 BPM
Note	Straight (ms)	Dotted (ms)	Triplet (ms)	Straight (Hz)
2 bars	5,333.33	8,000	3,555.56	0.188
1/1 (bar)	2,666.67	4,000	1,777.78	0.375
1/2	1,333.33	2,000	888.89	0.75
1/4	666.67	1,000	444.44	1.5
1/8	333.33	500	222.22	3
1/16	166.67	250	111.11	6
1/32	83.33	125	55.56	12
1/64	41.67	62.5	27.78	24

Worked example

A hip-hop track at 90 BPM with a delay throw on the vocal ad-libs

1Quarter note: 60,000 ÷ 90 = 666.67 ms
2Eighth note: 666.67 ÷ 2 = 333.33 ms; dotted: 333.33 × 1.5 = 500 ms
3Sixteenth triplet: 166.67 × 2/3 = 111.11 ms
4LFO once per beat: 1000 ÷ 666.67 = 1.5 Hz
5Hall reverb: pre-delay 1/64 = 41.67 ms, decay 5,291.67 ms to end on 2 bars

At 90 BPM: 666.67 ms quarter, 500 ms dotted eighth, 111.11 ms sixteenth triplet, 1.5 Hz per beat.

Frequently asked questions

What is the dotted eighth delay time at 90 BPM?

500 ms. An eighth note at 90 BPM is 333.33 ms, and a dot adds half again: 333.33 × 1.5 = 500 ms. The dotted quarter is twice that, 1,000 ms, and the plain quarter 666.67 ms.

What music is made at 90 BPM?

Mostly hip-hop, reggae and mid-tempo pop. 90 BPM is a staple hip-hop and reggae tempo, and half of 180, so the times also fit a double-time feel. Its quarter note of 666.67 ms is long enough that an eighth-note delay is often the main vocal echo.

What is 90 BPM in half time and double time?

Half time is 45 BPM, with a 1,333.33 ms quarter note; double time is 180 BPM, with a 333.33 ms quarter note. A delay set to a quarter note at 90 BPM is a half note in double time and an eighth note in half time, so it stays in sync either way.