Piano chord

F♯ Diminished 7th Chord

F♯dim7 is a diminished 7th chord built on F♯. It contains the notes F♯ – A – C – E♭.

F♯dim7

Also written: F♯°7, G♭dim7

A

C

F♯

E♭

Notes in F♯dim7

Count up from F♯ using the intervals below. The formula shows each note relative to the F♯ major scale.

Notes	Intervals	Formula	Semitones
F♯	Root	1	0
A	Minor 3rd	♭3	3
C	Diminished 5th	♭5	6
E♭	Diminished 7th	𝄫7	9

Right hand: fingers 1–2–3–5 (thumb on F♯).
Left hand: fingers 5–3–2–1, or play just the root in the left hand and the other notes in the right.
Inversions keep your hand closer to the previous chord — see below.

An inversion puts a different note of F♯dim7 at the bottom. The notes stay the same, the colour and voice leading change.

Four notes equally spaced — the most symmetrical chord in music. Its perfect symmetry creates an eerie, unresolved quality.

Sound: Eerie & dramatic

F♯dim7 is built only from notes of these keys. The Roman numeral shows its role in each key.

Hear F♯dim7 with different sounds and compare it with other chords in the interactive builder.

If chords sound sour even when you play the right notes, the piano is probably out of tune. Our technicians tune pianos across Israel.