BPM: Ruby

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
143 BPM
Beats per bar
4 beats
Bars per minute
35.8
Length of 1 beat
0.4196 sec
Length of 1 bar
1.6783 sec
Beats per second
2.3833 Hz

Fractions for base 16

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


1/16
1/16
6.25%
105 ms
9.53 Hz

2/16
1/8
12.5%
210 ms
4.77 Hz

3/16
3/16
18.75%
315 ms
3.18 Hz

4/16
1/4
25%
420 ms
2.38 Hz

5/16
5/16
31.25%
524 ms
1.91 Hz

6/16
3/8
37.5%
629 ms
1.59 Hz

7/16
7/16
43.75%
734 ms
1.36 Hz

8/16
1/2
50%
839 ms
1.19 Hz

9/16
9/16
56.25%
944 ms
1.06 Hz

10/16
5/8
62.5%
1 049 ms
0.953 Hz

11/16
11/16
68.75%
1 154 ms
0.867 Hz

12/16
3/4
75%
1 259 ms
0.794 Hz

13/16
13/16
81.25%
1 364 ms
0.733 Hz

14/16
7/8
87.5%
1 469 ms
0.681 Hz

15/16
15/16
93.75%
1 573 ms
0.636 Hz

16/16
1/1
100%
1 678 ms
0.596 Hz

24/16
3/2
150%
2 517 ms
0.397 Hz

32/16
2/1
200%
3 357 ms
0.298 Hz

48/16
3/1
300%
5 035 ms
0.199 Hz

64/16
4/1
400%
6 713 ms
0.149 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