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D diminished seventh chord

The Ddim7 chord (diminished seventh) is made of the notes D, F, A♭, C♭. Its formula compared with the major scale is 1 ♭3 ♭5 ♭♭7.

Ddim7

Sevenths · 4 notes

Note names

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How it is built

DegreeNoteInterval from the root
1DUnison
♭3FMinor third
♭5A♭Diminished fifth
♭♭7C♭Diminished seventh

Inversions

  • Ddim7D F A♭ C♭Root position
  • Ddim7/FF A♭ C♭ DFirst inversion
  • Ddim7/A♭A♭ C♭ D FSecond inversion
  • Ddim7/C♭C♭ D F A♭Third inversion

Frequently asked questions

Which notes make up the Ddim7 chord?
The notes are D, F, A♭, C♭.
What is the formula of the Ddim7 chord?
The formula is 1 ♭3 ♭5 ♭♭7: minor third, diminished fifth, diminished seventh.

Texts and tools by , professional musician and developer. Last updated: October 9, 2026.

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