semicord

C minor the chords in the key

Scale
C D Eb F G Ab Bb
Key signature
three flats: Bb Eb Ab
Relative major
Eb major

The seven chords

NumeralChordNotesSound
iCmC Eb G
ii°DdimD F Ab
IIIEbEb G Bb
ivFmF Ab C
vGmG Bb D
VIAbAb C Eb
VIIBbBb D F

Seventh chords

NumeralChordNotesSound
i7Cm7C Eb G Bb
iiø7Dm7b5D F Ab C
IIImaj7Ebmaj7Eb G Bb D
iv7Fm7F Ab C Eb
v7Gm7G Bb D F
VImaj7Abmaj7Ab C Eb G
VII7Bb7Bb D F Ab

V and V7: the raised-seventh V most songs use

From the harmonic minor scale: the seventh note raised a semitone, Bb to B.

NumeralChordNotesSound
VGG B D
V7G7G B D F

Common progressions in C minor

On guitar

Capo 3. With a capo on fret 3, play the open shapes Am for Cm, Dm for Fm, E for G: they sound as the i, iv and V (Cm, Fm and G). The VI chord, Ab, does not become an open shape at that fret.

How the chords of C minor work

C minor uses the notes C D Eb F G Ab Bb, three flats: Bb Eb Ab: the natural minor scale, the same notes as Eb major, its relative major. Its chords from the scale are i Cm, ii° Ddim, III Eb, iv Fm, v Gm, VI Ab, VII Bb.

In practice most songs in C minor play G or G7 as the V chord instead of Gm: raising Bb to B gives a note a semitone below C that pulls back to it. That raised seventh comes from the harmonic minor scale (C D Eb F G Ab B). So a song with both Bb and G in it is still in C minor, and the finder counts G and G7 as belonging to this key.

Have a list of chords and not sure of the key? The key finder scores it against all 24 keys and can transpose it.

What this page cannot do

  • Only major and minor keys. Dorian, Mixolydian and the other modes are not covered: a song in D Mixolydian (D, C, G) uses the chords of G major and will look like G major here.
  • Finding a key from chord names is a best fit, not a certainty. A chord list cannot tell a key from its relative major, which shares every chord; the melody and where the song comes to rest decide it.
  • Songs change key. A bridge or a last chorus a step higher is a new key, with its own page.
  • The sound is a simple synthesised tone made in your browser, each chord in root position, not a recorded piano or guitar.