Chord · 7ths
C♯m7♭5 — C♯ Half-Diminished
C♯m7♭5 is the C♯ half-diminished chord. It is built on the root C♯ with minor 3rd (E), diminished 5th (G) and minor 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 C♯m7♭5.
- Root
- C♯
- Quality
- Half-Diminished
- 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 C♯m7♭5
| Degree | Note | Interval from the root | Pitch |
|---|---|---|---|
| 1 | C♯ | root | C♯4 |
| ♭3 | E | minor 3rd | E4 |
| ♭5 | G | diminished 5th | G4 |
| ♭7 | B | minor 7th | B4 |
Other 7ths on C♯
Half-Diminished chords on every root
Part of the chord reference. See also the scales and the keys.