BPM: Scratch

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
115 BPM
Beats per bar
4 beats
Bars per minute
28.8
Length of 1 beat
0.5217 sec
Length of 1 bar
2.087 sec
Beats per second
1.9167 Hz

Fractions for base 16

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


1/16
1/16
6.25%
130 ms
7.67 Hz

2/16
1/8
12.5%
261 ms
3.83 Hz

3/16
3/16
18.75%
391 ms
2.56 Hz

4/16
1/4
25%
522 ms
1.92 Hz

5/16
5/16
31.25%
652 ms
1.53 Hz

6/16
3/8
37.5%
783 ms
1.28 Hz

7/16
7/16
43.75%
913 ms
1.10 Hz

8/16
1/2
50%
1 043 ms
0.958 Hz

9/16
9/16
56.25%
1 174 ms
0.852 Hz

10/16
5/8
62.5%
1 304 ms
0.767 Hz

11/16
11/16
68.75%
1 435 ms
0.697 Hz

12/16
3/4
75%
1 565 ms
0.639 Hz

13/16
13/16
81.25%
1 696 ms
0.590 Hz

14/16
7/8
87.5%
1 826 ms
0.548 Hz

15/16
15/16
93.75%
1 957 ms
0.511 Hz

16/16
1/1
100%
2 087 ms
0.479 Hz

24/16
3/2
150%
3 130 ms
0.319 Hz

32/16
2/1
200%
4 174 ms
0.240 Hz

48/16
3/1
300%
6 261 ms
0.160 Hz

64/16
4/1
400%
8 348 ms
0.120 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