Chord · 7ths
Cdim7 — C Diminished 7th
Cdim7 is the C diminished 7th chord. It is built on the root C with minor 3rd (E♭), diminished 5th (G♭) and diminished 7th (B𝄫) above it — the formula 1 ♭3 ♭5 𝄫7, sounding the notes C E♭ G♭ B𝄫. On the piano it sits at C (octave 4) and above in the library's voicing; the same 4 notes in any octave are still Cdim7.
- Root
- C
- Quality
- Diminished 7th
- Formula
- 1 ♭3 ♭5 𝄫7
- Notes
- C E♭ G♭ B𝄫
On the keyboard
Right-hand fingering for this voicing: 1–2–3–5 (1 is the thumb).
The notes of Cdim7
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | C | root | C4 |
| ♭3 | E♭ | minor 3rd | E♭4 |
| ♭5 | G♭ | diminished 5th | G♭4 |
| 𝄫7 | B𝄫 | diminished 7th | B♭♭4 |
Other 7ths on C
Diminished 7th chords on every root
Part of the chord reference. See also the scales and the keys.