C#dim7 Guitar Chord
A fully diminished seventh with symmetrical, mysterious quality. C#dim7 is essential for classical harmony.
Also known as
- C#°7
- Db°7
- C# °7
- Db °7
- Dbdim7
- C# dim7
- Db dim7
- D-flat°7
- C-sharp°7
- D-flat °7
- C-sharp °7
- D-flatdim7
- C-sharpdim7
- D-flat dim7
- C-sharp dim7
- C# diminished 7th
- Db diminished 7th
- C# diminished seventh
- Db diminished seventh
- D-flat diminished 7th
- C-sharp diminished 7th
- D-flat diminished seventh
- C-sharp 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
Like all dim7 chords, this shape is symmetrical and repeats every three frets. A comfortable position starts at the 4th fret. If you're playing jazz, use this chord as a passing chord between C# and D — it creates smooth chromatic movement.