BPM: Ruby Rosary

Give tempo and time signature

The speed at which music is played/performed is expressed as beats-per-minute or BPM. The more BPM, the faster the music goes. Most music uses the same BPM range as the human heartbeat: 60-140 bpm.
A base of 16 means that the bar is divided in 16 parts of length 1/16. The most common bases are 4, 8, 16 or 32. Use base 12 or 24 if you also want calculations for triplets.
This is also used in "Quantising": the process of snapping notes to the nearest beat subdivision.

Quick BPM overview

Beats per minute
78.6 BPM
Beats per bar
4 beats
Bars per minute
19.7
Length of 1 beat
0.7634 sec
Length of 1 bar
3.0534 sec
Beats per second
1.31 Hz

Fractions for base 16

These are some common fractions (handy for setting delays, LFO and modulation parameters)


1/16
1/16
6.25%
191 ms
5.24 Hz

2/16
1/8
12.5%
382 ms
2.62 Hz

3/16
3/16
18.75%
573 ms
1.75 Hz

4/16
1/4
25%
763 ms
1.31 Hz

5/16
5/16
31.25%
954 ms
1.05 Hz

6/16
3/8
37.5%
1 145 ms
0.873 Hz

7/16
7/16
43.75%
1 336 ms
0.749 Hz

8/16
1/2
50%
1 527 ms
0.655 Hz

9/16
9/16
56.25%
1 718 ms
0.582 Hz

10/16
5/8
62.5%
1 908 ms
0.524 Hz

11/16
11/16
68.75%
2 099 ms
0.476 Hz

12/16
3/4
75%
2 290 ms
0.437 Hz

13/16
13/16
81.25%
2 481 ms
0.403 Hz

14/16
7/8
87.5%
2 672 ms
0.374 Hz

15/16
15/16
93.75%
2 863 ms
0.349 Hz

16/16
1/1
100%
3 053 ms
0.328 Hz

24/16
3/2
150%
4 580 ms
0.218 Hz

32/16
2/1
200%
6 107 ms
0.164 Hz

48/16
3/1
300%
9 160 ms
0.109 Hz

64/16
4/1
400%
12 214 ms
0.0819 Hz

How to use this page

If you have a 135 BPM song, and you want a phase modulation of 4 beats: that is 1.778 sec
If you have a 98 BPM song in a measure of 3/4, and you want to know how long 8 bars is: 14.7 sec
If you have a 128 BPM song, and you want an audio delay of 2/3 of a beat: this is 313 ms
If you have a 80 BPM song, and you want an LFO of 5/4 of a bar: this is 4687.5 ms

Musical genres

These are some popular modern music genres with typical BPM speeds.

Slow dub/reggae
75 BPM
Fast dub/reggae
90 BPM
Deep house
96 BPM
Slow house
120 BPM
Electro house
130 BPM
Trance
135 BPM
Dubstep
140 BPM
Hard house
145 BPM
Jungle
160 BPM
Drum&Bass
175 BPM
Gabber
190 BPM

Music calculators & converters

Beats-per-minute
Convert BPM to Hz, bar length, fractions
Audio delay
Calculate audio delay length in msec
Music Frequency
Convert pitch to musical note and wavelength
Song length
Calculate song length from BPM
Music Scale
Generate scales with frequencies
Tap your tempo
Tap to find the BPM of a song or a heartbeat

Frequently Asked Questions

How do I convert BPM to milliseconds?

Divide 60,000 by the BPM. At 120 BPM: 60000÷120 = 500ms per beat. For subdivisions: quarter note = 500ms, eighth note = 250ms, sixteenth = 125ms. This is essential for setting delay times in DAWs.

How do I convert BPM to Hz (frequency)?

Divide BPM by 60. At 120 BPM: 120÷60 = 2 Hz (2 beats per second). This is useful for syncing LFOs, modulation, and effects to the tempo. A quarter note at 120 BPM = 2 Hz, eighth note = 4 Hz.

What is a good delay time for my BPM?

Common musical delay times: 1/4 note (one beat), 1/8 note (half beat), dotted 1/8 (3/16), or 1/16 note. At 120 BPM: quarter=500ms, eighth=250ms, dotted eighth=375ms, sixteenth=125ms. Dotted delays create a "bouncing" feel.

What does the time signature mean for BPM?

Time signature defines beats per bar, not speed. 4/4 = 4 quarter notes per bar, 3/4 = 3 (waltz), 6/8 = 6 eighth notes. BPM stays constant, but bar length changes. A 120 BPM song in 4/4 has 2-second bars; in 3/4, bars are 1.5 seconds.