TWO KEYS. ONE STEADY RHYTHM.
Find your comfortable pace.
Alternate two fingers, see your timing,
and build a steadier stream.
STREAM BPM 4 TAPS / BEAT
Choose your settings, then start. The first tap starts the timer.
Tap-to-tap BPM needs at least 2 taps. Hold-to-repeat does not count. Press Escape to pause.
SESSION COMPLETE
01 / THE METHOD
02 / YOUR NOTEBOOK
Last 12 completed runs on this device. Compare the same mode, duration and input method.
UNDER THE NUMBERS
This trainer assumes four taps per musical beat: BPM = taps per second × 15. Eight evenly spaced taps per second corresponds to 120 BPM at this spacing. It is a convention, not the BPM of every pattern in a song.
See the calculationInterval variation is the standard deviation of your tap gaps divided by their mean. A lower percentage means more even spacing. Alternation is separate: pressing the same key twice in a row records an alternation error.
Understand your traceBrowser scheduling, keyboard input and audio output add timing uncertainty. Early/late feedback is relative to this trainer’s nearest target tick, anchored by your first tap. It does not measure hardware latency or predict osu! accuracy.
About this independent toolYes. Select On-screen drill, start the session and alternate the two pads. Screen and keyboard results are labelled separately because the input paths and movement are different. The pads also support Enter or Space when focused.
Switching tabs, leaving this window or a long interruption pauses the run. Select Resume when you are ready. Paused time and the gap across the pause are excluded; your next tap anchors a new tempo grid.
No. Tap Lab is an original two-key timing exercise. It has no beatmaps, music library, game assets, account connection or official affiliation. The osu! name identifies a common reason people practise alternating taps.
Use the same browser, device, input method and duration when comparing runs. Tap-to-tap BPM excludes the silence after your last tap; full-window pace includes all active test time. Neither number is a calibrated hardware measurement.