C#dim Piano Chord

C sharp diminished is the C#dim piano chord. It has three notes: C sharp, E and G. Only the root is a black key.

1C♯3E5GC4C5

C♯ at the bottom, then E and G. Right hand 1-3-5, left hand 5-3-1. The black key is C♯.

How to play C#dim on piano, step by step

  1. Start on the C♯ above middle C. That is the lowest note of the chord.
  2. Thumb (1): C♯
  3. Middle finger (3): E
  4. Little finger (5): G
  5. Press them together with the right hand. The left hand plays the same notes with fingers 5, 3, 1 an octave lower, or just C♯ on its own as a bass note.

This chord is the leading tone chord of D, which means it wants to climb one key into a D chord. Playing the two in a row makes the pull obvious.

Inversions of C#dim

The same 3 notes with a different one at the bottom. All of them are C#dim; which you play depends on what the hand is coming from. Tap any card to hear it.

First inversionE G C♯
C#dim piano chord diagram, first inversion, E G C♯
Lighter than root position and less final. A flat third in the bass tips the chord forward, which is why it usually sits between two other chords rather than at the end of a line.
Second inversionG C♯ E
C#dim piano chord diagram, second inversion, G C♯ E
Open and slightly unresolved. A fifth in the bass makes the chord sound like a step on the way somewhere, which is mostly how it is used.

If it sounds wrong

The top note is G sharp
That gives C sharp minor. C sharp diminished needs G natural, one key lower.
The thumb slips off
C sharp is a black key and the other two are white, so the hand has to sit at a middle depth.
The chord will not settle
It is not meant to. Move it up one key to D major and it resolves.

What makes it a C#dim

C♯ · E · G 1 ♭3 ♭5

C sharp diminished is C sharp, E and G: the root, the flat third and the flat fifth.

It is the vii chord of D major, built on the leading note, so every one of its notes is a step away from a note in D. That is what makes it climb.

C#dim vs C#m

The top note. C sharp minor has G sharp; C sharp diminished lowers it to G.

C sharp minor is a comfortable black, white, black shape. Lowering the fifth brings the little finger onto a white key and changes the feel of the hand as well as the sound.

Questions about C#dim

Which notes are in a C#dim chord on piano?

C sharp, E and G. It is a minor chord with the fifth lowered by one key.

What is the difference between C#dim and C sharp minor?

The top note. C sharp minor has a normal fifth; C#dim lowers it by one key to G. That single change turns a sad chord into a tense one.

How does a diminished chord resolve?

Usually up by one key. C#dim leans toward D major, and playing the two in a row is the quickest way to hear why: every note of the diminished chord is a half step or a whole step from where it wants to go.

Is C#dim hard to play?

No. It is three notes with an even shape, since a diminished triad is two minor thirds stacked. The intervals are the same size, which makes the hand position symmetrical and easy to remember.

Chords to learn next

Other C# chords