The F♯ Diminished 7th chord is a four-note chord made up of F♯, A, C, and E♭. It is built from a root, minor third, diminished fifth, and diminished seventh.
Construction
F♯ Diminished 7th = Root + Minor 3rd + Diminished 5th + Major 6th = F♯ · A · C · E♭
| Note | Interval | Degree |
|---|---|---|
| F♯ | Root | 1 |
| A | Minor 3rd | ♭3 |
| C | Diminished 5th | ♭5 |
| E♭ | Major 6th | 6 |
F♯ Diminished 7th Inversions
| Position | Notes |
|---|---|
| Root Position | F♯ – A – C – E♭ |
| 1st Inversion | A – C – E♭ – F♯ |
| 2nd Inversion | C – E♭ – F♯ – A |
| 3rd Inversion | E♭ – F♯ – A – C |
Key Signature
A Diminished 7th chord is built from symmetrical or ambiguous intervals, so it doesn’t belong to a single key and has no key signature of its own.
Same Notes, Other Names
The notes F♯ – A – C – E♭ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell the following:
F♯ Diminished 7th — Frequently Asked Questions
What is the F♯ Diminished 7th chord on piano?
The F♯ Diminished 7th chord contains the notes F♯ – A – C – E♭. On piano, play these notes together to sound the chord.
What notes are in the F# Diminished 7th chord?
F# Diminished 7th is built from the F# root. Check the interactive keyboard above for exact notes and fingering.
How is the F# Diminished 7th chord used in music?
F# Diminished 7th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Diminished 7th).
What is the fingering for F# Diminished 7th?
See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.
What are the inversions of F# Diminished 7th?
Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.