F#dim7 Guitar Chord
F#dim7 is a four-note fully diminished seventh chord built from F#, A, C, D#. Its symmetrical structure — four notes each a minor third apart — creates maximum harmonic tension and tonal ambiguity. It is a powerful tool for dramatic resolutions in jazz, classical, and film scoring.
4 ways to play F#dim7
Notes
Intervals
F# (Root), A (Minor 3rd), C (Diminished 5th), D# (Diminished 7th)
Found in keys
Notes in the F# Diminished 7th Chord
The F# Diminished 7th chord is built from 4 notes: F#, A, C, D#. It is a diminished 7th chord — built from a root, minor third, diminished fifth, and diminished seventh (9 semitones above the root). On guitar, these notes are voiced across multiple strings simultaneously to create the full chord sound. Depending on the voicing, some notes may be doubled in different octaves to fill out the sound.
Keys That Contain F# Diminished 7th
F#dim7 shares its leading-tone function with the F#dim chord, which is the vii° in these keys:
Common Chord Progressions with F#dim7
F# Diminished 7th appears in many common progressions. Here are the most-used patterns when F#dim7 is the tonic chord:
Use our chords in a key tool to find all the chords that naturally pair with F#dim7 in any key.
Frequently Asked Questions
What notes are in the F# Diminished 7th chord?
The F# Diminished 7th chord is made up of F#, A, C, D#. These 4 notes form a four-note chord structure.
What key is the F# Diminished 7th chord in?
F# Diminished 7th naturally appears in the keys of G Major. It can also appear in other contexts as a borrowed chord or secondary chord.
How do I play the F#dim7 chord on guitar?
Place your fingers on the guitar fretboard according to the diagram above. The numbered dots show finger placement (1 = index, 2 = middle, 3 = ring, 4 = pinky), "O" means play the string open, and "X" means mute that string.
Other F# Chords
Write chord sheets with F#dim7 in Chordly — click any chord to add it to your lyrics, then share or export.
Drag and drop chords directly onto your lyrics, build guitar tabs, and practice hands-free with autoscroll Play Mode. All in your browser — no download needed.