Minor ii–V–i
in B♭ minor
Piano chord
C Half-Diminished 7th Piano Chord (Cm7♭5)
The C Half-Diminished 7th chord on piano is made of the notes C, E♭, G♭ and B♭. Bittersweet tension. Used as the ii chord in minor keys.
Tap any key to hear it.
What notes are in C Half-Diminished 7th?
4 notes, built 1 – ♭3 – ♭5 – ♭7 up from C.
- Notes
- C – E♭ – G♭ – B♭
- Formula
- 1 – ♭3 – ♭5 – ♭7
- Semitones from the root
- 0 – 3 – 6 – 10
- Symbol
- Cm7♭5
- Chord type
- Half-Diminished 7th, 4 notes
How to play C Half-Diminished 7th on piano
- Right hand: C (1), E♭ (2), G♭ (3), B♭ (5). Fingers 1 – 2 – 3 – 5, thumb on C.
- Left hand: C (5), E♭ (3), G♭ (2), B♭ (1). Fingers 5 – 3 – 2 – 1, little finger on C.
Fingers are numbered 1 (thumb) to 5 (little finger) on both hands.
C Half-Diminished 7th inversions
Each inversion puts a different note of the chord in the bass. Written as a slash chord: Cm7♭5/E♭, Cm7♭5/G♭, Cm7♭5/B♭.
Can you find C Half-Diminished 7th?
Tap the notes on the keyboard, then check. Six chords, starting with this one.
1 / 6 Tap the notes of C Half-Diminished 7th (Cm7♭5)
Score 0
Any octave, any order. Each key you tap plays.
What key is C Half-Diminished 7th in?
The keys whose scale contains every note of Cm7♭5, with the chord’s Roman numeral in each.
Major keys
- D♭ majorviiø7
Minor keys
- B♭ minoriiø7
C Half-Diminished 7th chord FAQ
What notes are in the C Half-Diminished 7th chord?
C Half-Diminished 7th (Cm7♭5) has 4 notes: C, E♭, G♭ and B♭. Its formula is 1 – ♭3 – ♭5 – ♭7, counted up from C.
How do you play C Half-Diminished 7th on the piano?
Put your right thumb on C and play C, E♭, G♭ and B♭ with fingers 1 – 2 – 3 – 5. With the left hand, use fingers 5 – 3 – 2 – 1, little finger on C.
What are the inversions of C Half-Diminished 7th?
1st inversion: E♭, G♭, B♭, C (Cm7♭5/E♭). 2nd inversion: G♭, B♭, C, E♭ (Cm7♭5/G♭). 3rd inversion: B♭, C, E♭, G♭ (Cm7♭5/B♭).
What key is C Half-Diminished 7th in?
Cm7♭5 belongs to D♭ major (viiø7) and B♭ minor (iiø7).