What notes are in a C# dim chord?

A C# dim piano chord uses the notes C#, E, G.

How do I practice C# on piano?

Start in root position, then try the inversions, listen with the audio button, and practice short changes to related chords in the same key.

Can I explore C# in every key?

Yes. Open the Interactive Chord Explorer to transpose this chord quality across all twelve roots, or use Practice Mode to drill changes in time.

C# dim Piano Chord

The C# dim chord contains the notes C#, E, G, built from the intervals 1 – b3 – b5.

Chord formula

1 – b3 – b5

Show intervals

Active voicing: C# – E – G

C# dim

Notes: C#, E, G
Intervals: 1, b3, b5
Also known as: C#dim, C#°

Chord inversions

C
D
E
F
G
A
B
C
D
E
F
G
A
B
C#
C
D
E
F
G
A
B
C
D
E
F
G
A
B
C#
C
D
E
F
G
A
B
C
D
E
F
G
A
B
C#

Practice This Chord

Practice This Chord Open in Chord Explorer Practice a progression Explore its key in Circle of Fifths

Related chords

Not sure which chord you are playing?

Play the notes on a piano or MIDI keyboard and the Reverse Chord Finder identifies the chord, its inversion, and any slash-chord name.

Open the Reverse Chord Finder

Related learning

How it is built

C# diminished stacks two minor thirds. The flattened fifth creates a restless, unstable sound compared with major or minor triads.

Common musical function

Diminished chords often act as leading-tone tension that wants to resolve up a half step — useful before tonic or dominant chords.

Beginner practice advice

Practice C# in root position until the shape feels automatic, then try the first and second inversions. Use the audio button to check your voicing, and drill short changes to neighboring chords in the same key.

Moving into and out of the chord

Look for shared notes with nearby chords in the key — keeping a finger on a common tone makes changes smoother. G# Major (dominant) and F# Major (subdominant) are good starting points for short practice loops — see the full related chords list below for more.

FAQ

What notes are in a C# dim chord?: A C# dim piano chord uses the notes C#, E, G.
How do I practice C# on piano?: Start in root position, then try the inversions, listen with the audio button, and practice short changes to related chords in the same key.
Can I explore C# in every key?: Yes. Open the Interactive Chord Explorer to transpose this chord quality across all twelve roots, or use Practice Mode to drill changes in time.

Ready to practice C# dim Piano Chord?

Use Go Practice to drill chord changes with a metronome and build muscle memory in this key.

Practice This Chord Open in Chord Explorer