B diminished piano chord
The B diminished chord, written Bdim, on a keyboard. Its notes are B – D – F — free to print or download below.

Notes in the B diminished chord
The B diminished chord is built from the root, a minor third and a diminished fifth, giving the notesB – D – F. On the keyboard diagram those keys are shaded so you can see the shape at a glance.
How to play the B diminished chord
- Find the notes. The B diminished chord uses the notes B – D – F. Locate each one on your keyboard using the diagram above.
- Place your fingers. In root position, play B – D – F together — thumb on the lowest note and the remaining fingers on the notes above.
- Play it as a block or broken. Play all the notes at once for a solid chord, or one after another for an arpeggio.
B diminished chord — frequently asked questions
What notes are in the B diminished chord?
The B diminished chord (Bdim) is made up of the notes B – D – F — the root, a minor third and a diminished fifth.
What is the chord symbol for B diminished?
It is written as Bdim. On a lead sheet or chord chart you would see "Bdim" above the stave.
Is the B diminished chord diagram free to print?
Yes — print it or download the PDF or PNG for free, with no account or sign-up.