C diminished piano chord
The C diminished chord, written Cdim, on a keyboard. Its notes are C – E♭ – G♭ — free to print or download below.

Notes in the C diminished chord
The C diminished chord is built from the root, a minor third and a diminished fifth, giving the notesC – E♭ – G♭. On the keyboard diagram those keys are shaded so you can see the shape at a glance.
How to play the C diminished chord
- Find the notes. The C diminished chord uses the notes C – E♭ – G♭. Locate each one on your keyboard using the diagram above.
- Place your fingers. In root position, play C – E♭ – G♭ 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.
C diminished chord — frequently asked questions
What notes are in the C diminished chord?
The C diminished chord (Cdim) is made up of the notes C – E♭ – G♭ — the root, a minor third and a diminished fifth.
What is the chord symbol for C diminished?
It is written as Cdim. On a lead sheet or chord chart you would see "Cdim" above the stave.
Is the C diminished chord diagram free to print?
Yes — print it or download the PDF or PNG for free, with no account or sign-up.