Every scale and chord, every instrument, one screen.

C#dim chord (C sharp diminished) on piano

C#dim (C sharp diminished) has three notes: C sharp, E and G. Its formula is 1, b3, b5. In major keys, C#dim is the vii° chord in D major.

C#dim inversions and fingering

EGC#
Root position
C# E G · RH 1-3-5 · LH 5-3-1
EGC#
First inversion
E G C# · RH 1-2-5 · LH 5-3-1
GEC#
Second inversion
G C# E · RH 1-3-5 · LH 5-2-1

Hear it and see every shape in ScaleSpace →

C#dim chord facts
SymbolC#dim
Also writtenC#°, C#o
NotesC# E G
Formula1 b3 b5
Intervalsroot, minor third, tritone
TypeDiminished chord

C#dim across the keyboard

C3C4C5Eb3Gb5Eb3Gb5C#1C#1

Piano, C3 to C5. Notes in this scale, low to high: C#3 (1), E3 (flat 3), G3 (flat 5), C#4 (1), E4 (flat 3), G4 (flat 5).

Swipe the chart sideways to see all of it.

Questions

What notes are in the C#dim chord?

C#dim (C sharp diminished) has three notes: C sharp, E and G. Its formula is 1, b3, b5. C# is the root, E is the minor third and G is the tritone.

How do you play C#dim on piano?

Play C#, E and G together. Root position: C# E G · RH 1-3-5 · LH 5-3-1.

What key is C#dim in?

In major keys, C#dim is the vii° chord in D major. It is diatonic to those keys, so it fits songs in any of them.

What is the difference between C#dim and C#m?

C#dim is C#m with its 5th lowered a half step, from G# to G. That flat 5th is what gives it its tense sound.