JP

Tap BPM Counter

曲に合わせてタップするだけでBPMを測れます

拍に合わせてボタンかキーを叩くと、その場でBPMが出ます。音声ファイルがあれば、下の自動測定でもテンポを計測できます。測ったBPMは、そのままメトロノームとディレイタイム表に反映されます。

タップでBPMを測る

曲を流しながら、拍に合わせてボタンかキーを叩いてください。押し損ねた1回は自動で除いて計算します。

0
BPM
タップの安定度 --

4回以上たたくと数値が落ち着きます

スペースキーなど好きなキーでタップできます(Escでリセット)

音源からBPMを自動測定

ファイルを置くだけでテンポを解析します。解析はブラウザの中だけで行われ、音源がサーバーへ送信されることはありません。

🎵

音声・動画ファイルをドロップ

MP3・WAV・M4A・OGG など/クリックして選択もできます/動画(MP4・MOV)も可

測ったBPMで鳴らす(メトロノーム)

測った値が本当に曲と合っているか、鳴らして確かめられます。そのまま練習用のメトロノームとしても使えます。

ディレイタイム・音符長の換算表

現在のBPMでの音符の長さ(ミリ秒)です。ディレイやリバーブのプリディレイをテンポに合わせるときにそのまま入力できます。

音符 通常 付点 3連符

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About Tap BPM Counter

BPM Counter measures a song's tempo — its beats per minute. Tap along with the beat while the song plays, or, if you have the audio file, drop it in and the tempo is detected automatically.

Tap tempo automatically discards a missed or rushed tap using a median-based filter before averaging the rest. The reading is shown to one decimal place, and tap scatter is displayed as a consistency meter so you can see at a glance whether the number has settled or is still drifting. Tap with the button, the spacebar, or any other key, and press Esc to reset.

Automatic detection locates beats from changes in audio energy and estimates the tempo by autocorrelation. Everything runs inside your browser, so your audio is never uploaded. Each result comes with a confidence reading that is honest about tracks with an unclear pulse, and half/double tempo candidates can be swapped in with one tap to settle the classic half-time versus double-time question.

What sets this tool apart is what happens after the measurement. The tempo feeds straight into a metronome with 4/4, 3/4, and 6/8 time signatures so you can hear whether the reading truly matches the track. A linked delay-time table shows note lengths in milliseconds from whole notes down to 32nd notes, in straight, dotted, and triplet variants — type them directly into a delay or a reverb pre-delay to lock it to the tempo.

It suits DJs checking tempo before a transition, producers matching samples and acapellas in a DAW, drummers and guitarists transcribing or practising, and anyone building a running or workout playlist. No installation, no account.

Video files such as MP4, MOV, and WebM are accepted as well. Only the audio track is extracted and processed just like an audio file.

How to use Tap BPM Counter

  1. Play the song and click the TAP button or strike the spacebar — or any other key — in time with the beat. Press Esc to reset at any point.
  2. The number settles after about four taps. The higher the tap consistency meter reads, the more you can trust the value. A single mistimed tap is excluded automatically, so there is no need to start over.
  3. If you have the audio, drag and drop an MP3, WAV, M4A, or OGG file onto the automatic detection area — or click to choose one. Analysis runs in your browser and the file is never sent anywhere.
  4. The detected BPM appears in large type along with a confidence reading. When confidence is low the track has an unclear pulse, so cross-check it against the tap counter above.
  5. If the tempo feels half or double what you expected, press one of the candidate buttons to swap it into the main display. Dance tracks are often the doubled value; ballads are often the halved one.
  6. Press the button that sends the BPM to the metronome and table, then play it back over the song. Choose 4/4, 3/4, or 6/8 and confirm by ear that the tempo really lines up.
  7. The delay-time table at the bottom lists note lengths in milliseconds at that BPM. Copy them and paste the values straight into a delay or a reverb pre-delay in your DAW.

Benefits of Tap BPM Counter

  • [Measure by tapping or from a file] Tap along while the song plays, or use one drop for automatic detection when you have the audio. Use tapping for jazz and acoustic material where automated analysis struggles, and the file path for tracks with a clear pulse — both results sit side by side on the same screen.
  • [Mistimed taps removed, no guesswork left] A missed tap is filtered out by a median-based rule before averaging, so a slip mid-count does not force a restart. Readings show one decimal place and tap scatter appears as a consistency meter, so you can tell numerically whether to trust the value. Automatic detection carries its own confidence reading.
  • [Put the tempo to work immediately] Send the measurement to the built-in metronome and play it in 4/4, 3/4, or 6/8 over the track to confirm the tempo by ear. A linked delay-time table gives straight, dotted, and triplet millisecond values ready to type into a DAW — no need to open another site after finding the BPM.
  • [Zero network traffic, entirely in the browser] Unlike services that upload your audio for server-side analysis, every step runs locally. In a venue with poor reception or on a phone in airplane mode, the page keeps working with no waiting.

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