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F diminished chord

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

Fdim

Triads · 3 notes

Note names

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How it is built

DegreeNoteInterval from the root
1FUnison
♭3A♭Minor third
♭5C♭Diminished fifth

Inversions

  • FdimF A♭ C♭Root position
  • Fdim/A♭A♭ C♭ FFirst inversion
  • Fdim/C♭C♭ F A♭Second inversion

Which keys it belongs to

Fdim 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 Fdim chord?
The notes are F, A♭, C♭.
What is the formula of the Fdim chord?
The formula is 1 ♭3 ♭5: minor third, diminished fifth.

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

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