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F#dim chord (F sharp diminished) on piano

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

F#dim inversions and fingering

ACF#
Root position
F# A C · RH 1-3-5 · LH 5-3-1
ACF#
First inversion
A C F# · RH 1-2-5 · LH 5-3-1
CAF#
Second inversion
C F# A · RH 1-3-5 · LH 5-2-1

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F#dim chord facts
SymbolF#dim
Also writtenF#°, F#o
NotesF# A C
Formula1 b3 b5
Intervalsroot, minor third, tritone
TypeDiminished chord

F#dim across the keyboard

C3C4C5Cb5Ab3Cb5Ab3Cb5F#1F#1

Piano, C3 to C5. Notes in this scale, low to high: C3 (flat 5), F#3 (1), A3 (flat 3), C4 (flat 5), F#4 (1), A4 (flat 3), C5 (flat 5).

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Questions

What notes are in the F#dim chord?

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

How do you play F#dim on piano?

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

What key is F#dim in?

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

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

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