F♯ Diminished 7th
F♯dim7
Notes
F♯ · A · C · E♭
Intervals
- RootF♯ (1P)
- Minor 3rdA (3m)
- Diminished 5thC (5d)
- Diminished 7thE♭ (7d)
Fretboard
On the fretboard, D♯ represents E♭.
Adjust labels, frets, and palette in the interactive view.
Voicings & shapes
Drop-3 voicings (8)
Shell voicings (2)
Dim7 symmetrical (3)
One shape moved up 3 frets gives the next enharmonic root: C, E♭, G♭, and A dim7 are the same four notes.
About
The F♯ fully diminished 7 (F♯–A–C–E♭) stacks four minor thirds, giving it a fully symmetrical structure. Each note can be respelled as a root — F♯°7 is enharmonically the same chord as A°7, C°7, and E♭°7 — meaning a single shape on the guitar can function as four different leading-tone chords depending on context. This flexibility makes dim7 especially useful as a passing or substitution chord, often resolving up a half step (here to G). All four tones carry the chord’s identity; the chord is defined by its symmetry, so removing any note weakens that quality. On guitar, one shape repeats identically every three frets. Compared to F♯m7♭5, dim7 is more unstable and dramatically tense.
Chord diagrams
F# Diminished 7th voicing charts — tap a sheet to open it full size to save or print.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- F♯ Diminished (deg 1)
- A Diminished (deg 7)
- B♭ Diminished (deg 6)
- B♭ Harmonic Minor (VI)
- C Diminished (deg 5)
- D♭ Diminished (deg 4)
- D♭ Harmonic Minor (IV)
- E Diminished (deg 2)
- E Harmonic Minor (II)
- E♭ Diminished (deg 3)
- G Diminished (deg 8)
- G Harmonic Minor (VII)
Scales whose notes include every chord tone. The Roman numeral (or scale degree) marks the chord root’s position in the scale.