BPM: I Ll Forget You Tomorrow

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
125.2 BPM
Beats per bar
4 beats
Bars per minute
31.3
Length of 1 beat
0.4792 sec
Length of 1 bar
1.9169 sec
Beats per second
2.0867 Hz

Fractions for base 16

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


1/16
1/16
6.25%
120 ms
8.35 Hz

2/16
1/8
12.5%
240 ms
4.17 Hz

3/16
3/16
18.75%
359 ms
2.78 Hz

4/16
1/4
25%
479 ms
2.09 Hz

5/16
5/16
31.25%
599 ms
1.67 Hz

6/16
3/8
37.5%
719 ms
1.39 Hz

7/16
7/16
43.75%
839 ms
1.19 Hz

8/16
1/2
50%
958 ms
1.04 Hz

9/16
9/16
56.25%
1 078 ms
0.927 Hz

10/16
5/8
62.5%
1 198 ms
0.835 Hz

11/16
11/16
68.75%
1 318 ms
0.759 Hz

12/16
3/4
75%
1 438 ms
0.696 Hz

13/16
13/16
81.25%
1 558 ms
0.642 Hz

14/16
7/8
87.5%
1 677 ms
0.596 Hz

15/16
15/16
93.75%
1 797 ms
0.556 Hz

16/16
1/1
100%
1 917 ms
0.522 Hz

24/16
3/2
150%
2 875 ms
0.348 Hz

32/16
2/1
200%
3 834 ms
0.261 Hz

48/16
3/1
300%
5 751 ms
0.174 Hz

64/16
4/1
400%
7 668 ms
0.130 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
Fast dub/reggae
Deep house
Slow house
Electro house
Trance
Dubstep
Hard house
Jungle
Drum&Bass
Gabber

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