C minor piano chord

How to play Cm on piano

First, find C, the root of this chord. Then add E♭, the minor third. Add G to complete the triad.

Play the notes together to hear the harmony, or one at a time to hear how the intervals form the chord. Start at a comfortable octave; the diagram shows one reference voicing, not the only valid place to play it.

What makes Cm distinctive?

C minor, C–E♭–G, has two white keys and a black-key third. That E♭ changes the sound from the familiar C major triad.

How does Cm compare with a related chord?

Compare C minor to E♭ major (E♭–G–B♭). E♭ and G are common tones while C moves down to B♭.

A practice exercise for Cm

Hold E♭ and G, switch between adding C and adding B♭. Notice how the same shared notes can support different roots.

One mistake to avoid

For C minor, write E♭ as the third, not D♯. The note must be a type of E to spell a third over C.

Finger numbers depend on your hand size, octave and musical context; there isn't one universally correct fingering for every voicing.