This chord has 4 voicings across the fretboard. Use the arrows to see each shape and fingering — and tap any dot on the diagram to hear that note.
Cdim7 Guitar Chord
A fully diminished seventh chord with an eerie, symmetrical quality. Cdim7 is essential for classical and jazz harmony.
Also known as
- C°7
- C °7
- C dim7
- C diminished 7th
- C diminished seventh
How to Play This Chord
Position your fingers on the fretboard as shown in the diagram. The vertical lines represent the strings, from low E (left) to high E (right), and the horizontal lines are the frets. Numbers inside the dots indicate which finger to use: 1 (index), 2 (middle), 3 (ring), 4 (pinky). An X means don't play that string; an O means play it open. A bar spanning multiple strings means one finger presses across all of them at once — this is known as a barre chord.
Tips & Tricks
Because diminished 7th chords are symmetrical (every note is a minor 3rd apart), the same Cdim7 shape repeats every three frets. This means you already know the shape in multiple positions — just slide it up by three frets and you get the same chord.