Which notes are in the F#dim chord?

F#dim contains the notes F#, A and C. Relative to the root these are the degrees 1 – ♭3 – ♭5.

Are F#dim and Gbdim the same chord?

Yes. F#dim and Gbdim are enharmonically identical — the spelling differs but the frets and keys are the same. Which name is used depends on the key of the piece.

F# diminished · Piano

F#dim Chord on Piano

The F#dim chord (F# diminished) is built from the notes F#, A and C. The keyboard diagram below shows exactly which keys to press. The same chord is also written Gbdim; both spellings sound identical.

Chord diagrams

F#dim

Notes in this chord

F♯
A
C

Degrees: 1 – ♭3 – ♭5

Also written: Gbdim

How to play

To play F#dim on piano, press F#, A and C together. In root position the lowest note is F#, and the finger numbers follow the keys left to right in the diagram.

Theory behind the chord

Diminished triads stack two minor thirds, so both the third and the fifth are lowered. The result is unstable and restless, and it usually appears as a passing chord between two stable ones. On F#dim this structure sits on the root F#, so the degrees 1 – ♭3 – ♭5 map onto F#, A and C.

Frequently asked questions

Which notes are in the F#dim chord?: F#dim contains the notes F#, A and C. Relative to the root these are the degrees 1 – ♭3 – ♭5.
Are F#dim and Gbdim the same chord?: Yes. F#dim and Gbdim are enharmonically identical — the spelling differs but the frets and keys are the same. Which name is used depends on the key of the piece.

Practise F#dim on your phone

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