Diminished Seventh Chord
The diminished seventh chord consists of four equally-spaced minor thirds, creating a symmetrical, highly dissonant chord. It is used as a dramatic pivot chord and in chromatic passing harmony.
Symbol: dim7, °7
Formula: 1-♭3-♭5-𝄫7
C Diminished Seventh Chord: C – D♯ – F♯ – A
Choose a Root
C Diminished Seventh Chord G Diminished Seventh Chord D Diminished Seventh Chord A Diminished Seventh Chord E Diminished Seventh Chord B Diminished Seventh Chord F♯ Diminished Seventh Chord F Diminished Seventh Chord B♭ Diminished Seventh Chord E♭ Diminished Seventh Chord A♭ Diminished Seventh Chord D♭ Diminished Seventh Chord
Interval Formula
| Degree | Interval | Semitones from Root | Note (C Diminished Seventh Chord) |
|---|---|---|---|
| 1 | Root (1) | 0 | C |
| ♭3 | Minor 3rd (♭3) | 3 | D♯ |
| ♭5 | Tritone (♭5) | 6 | F♯ |
| 𝄫7 | Major 6th (6) | 9 | A |