What Is BPM? Tempo Explained

Beats per minute, in plain language, plus a daily game to feel the pulse for yourself.

Quick version: BPM counts how many beats land in one minute. At 60 BPM a beat hits once a second. At 120, twice a second. Bigger number, faster song. BPM is just how we put a figure on a piece's tempo.

First, what a beat even is

Put on almost any song and your foot starts tapping. That tap is the beat, the steady pulse sitting under everything else. It doesn't care how busy the melody gets. It just keeps time. BPM counts those pulses across one minute, and because a minute is always 60 seconds, the sums stay friendly: divide the BPM by 60 and you get beats per second. So 60 BPM is one tap a second, and 120 is two. Notice that the beat isn't the same as the notes. A melody can cram a dozen notes between two beats while the pulse underneath keeps strolling along at its own even rate.

The one piece of math worth knowing

You really only need two small conversions, and they're what every metronome and drum machine actually runs on:

• Beats per second = BPM ÷ 60
• Seconds per beat = 60 ÷ BPM

Try it on a 100 BPM track. Sixty divided by 100 is 0.6, so a fresh beat lands every six-tenths of a second. Want a one-bar loop in common four-beat time? That's four beats, so 2.4 seconds exactly, the sort of figure a producer nails down before laying a single note. Here is how a handful of everyday tempos shake out:

BPM or tempo: is there a difference?

In everyday talk, no. Say either word and people know what you mean. Strictly, though, they part ways. BPM is a number. Tempo is the speed and the character, and it happens to be measured in BPM. Two songs can share a tempo on paper and still feel like they live on different planets, one tense, one easy, because rhythm and arrangement colour the same count. Classical scores skip the number and reach for words instead, like andante or allegro. If that crossover is your thing, our guide to tempo markings and their BPM ranges maps the words onto the numbers.

Why anyone bothers with a number

Because "how fast is this song?" is almost impossible to settle by feel, and BPM makes it exact. DJs live by it: match two tracks' BPM and one slides into the next with no bump. Producers lock every layer to the project tempo. Runners pick playlists by BPM to hold a cadence, which we dig into in workout BPM and cadence. And if you're learning an instrument, "play it faster" is a shrug, while "take it from 90 up to 96" is a target you can actually aim at.

How to find a song's BPM

No app required. Tap along with the beat, count your taps over fifteen seconds, multiply by four. That's your BPM. Count over thirty seconds and double it if you want to smooth out the wobble in your tapping. A tap-tempo tool just automates the same trick, averaging the gaps between your taps. One catch worth knowing: streaming and DJ apps show a BPM too, but they sometimes latch onto double or half the real tempo when a song's pulse is ambiguous. When the readout and your ears disagree, trust your ears.

A few things people get wrong

Fast notes don't mean a high BPM. You can have a blizzard of sixteenth notes racing over a lazy 70 BPM pulse; what sets the tempo is the beat underneath, not the busiest layer on top. BPM isn't fixed for a whole song, either. Plenty of tracks speed up, ease off, or change gear between sections. And faster isn't "better," it's just faster. The right tempo is whatever serves the song. When the beat itself splits into smaller even parts, that's a separate idea called subdivision, and it's worth its own read.

Keep reading

• How to improve your rhythm & timing: turning "I know the BPM" into "I can hold it."
• Tap tempo: find any BPM by tapping: the practical way to read a song's speed.
• Tempo JND & Weber's law: the smallest tempo change you can actually notice.
• From our sister site: Hue, saturation & lightness, the same "put a number on a perception" idea, for colour.

Sources: Justin London, Grove Music Online, Tempo (i); David Fallows, Grove Music Online, Metronome (i); van Noorden, L. and Moelants, D. (1999), Resonance in the perception of musical pulse, Journal of New Music Research; J. Devin McAuley (2010), Tempo and Rhythm, Springer Handbook of Auditory Research: Music Perception; Ableton, Beat and Tempo.