Go to the app!
← Chords

C diminished chord

The Cdim chord (diminished) is made of the notes C, E♭, G♭. Its formula compared with the major scale is 1 ♭3 ♭5.

Cdim

Triads · 3 notes

Note names

Open in the chord tool

How it is built

DegreeNoteInterval from the root
1CUnison
♭3E♭Minor third
♭5G♭Diminished fifth

Inversions

  • CdimC E♭ G♭Root position
  • Cdim/E♭E♭ G♭ CFirst inversion
  • Cdim/G♭G♭ C E♭Second inversion

Which keys it belongs to

Cdim is a diatonic chord, that is, it comes from a degree of the scale, in these keys:

Frequently asked questions

Which notes make up the Cdim chord?
The notes are C, E♭, G♭.
What is the formula of the Cdim chord?
The formula is 1 ♭3 ♭5: minor third, diminished fifth.

Texts and tools by , professional musician and developer. Last updated: October 8, 2026.

From theory to practice

With GEN you generate ever-new exercises on the scales you are studying.

Go to the app!