Every scale and chord, every instrument, one screen.

Minor 9 chords

A minor ninth chord has five notes: the root, minor third, perfect fifth, minor seventh and major second. Its formula is 1 b3 5 b7 9. A minor 7th chord with the 9th added. It is a common ii chord in jazz and soul.

On C it is written Cm9, and also Cmin9 and C-9.

Minor 9 chords in every key

Every minor ninth chord, with its page on each instrument
ChordNotesShapes
Cm9C Eb G Bb Dguitar · piano
C#m9C# E G# B D#guitar · piano
Dm9D F A C Eguitar · piano
Ebm9Eb Gb Bb Db Fguitar · piano
Em9E G B D F#guitar · piano
Fm9F Ab C Eb Gguitar · piano
F#m9F# A C# E G#guitar · piano
Gm9G Bb D F Aguitar · piano
G#m9G# B D# F# A#guitar · piano
Am9A C E G Bguitar · piano
Bbm9Bb Db F Ab Cguitar · piano
Bm9B D F# A C#guitar · piano

Minor 9 compared

On C: how minor ninth differs from the chords it is confused with
ChordSymbolFormulaNotesDifference
Minor 9Cm91 b3 5 b7 9C Eb G Bb D
Minor 7Cm71 b3 5 b7C Eb G BbCm7 is Cm9 (C, Eb, G, Bb and D) without D, the 9th.
Dominant 9C91 3 5 b7 9C E G Bb DC9 and Cm9 share C, G, Bb and D. C9 has E, the 3rd, where Cm9 has Eb, the flat 3rd.
Major 9Cmaj91 3 5 7 9C E G B DCmaj9 and Cm9 share C, G and D. Cmaj9 has E, the 3rd and B, the 7th, where Cm9 has Eb, the flat 3rd and Bb, the flat 7th.

Questions

What is a minor ninth chord?

A minor ninth chord has five notes: the root, minor third, perfect fifth, minor seventh and major second. Its formula is 1 b3 5 b7 9. A minor 7th chord with the 9th added. It is a common ii chord in jazz and soul.

How do you write a minor ninth chord?

On C it is written Cm9, and also Cmin9 and C-9.

What is the difference between Cm9 and Cm7?

Cm9 is Cm7 (C, Eb, G and Bb) with D, the 9th, added.