Rhythm Calculator [Renewed June 2026]

A practice web app that's useful when you can't understand rhythm just by looking at sheet music.

Simply input notes as you see them on the staff, and you can immediately confirm the rhythm through sheet music display and playback.
The key feature is that you can intuitively understand rhythm through sound without having to imagine note lengths in your head.

The operation is as simple as a calculator, allowing you to input even complex rhythms without hesitation. It's ideal for rhythm practice that's difficult to master with just a metronome.

No installation required—use it immediately from your smartphone or PC. It can also be utilized for individual practice in light music, concert band, and choral groups.