Playing the Fdim7 Guitar Chord
The Fdim7 chord is a diminished 7th chord built on the root F. It contains 4 notes: F, G#, B, D. On guitar, this chord can be played in multiple positions across the fretboard, from open shapes to barre chord voicings.
Four notes stacked in minor thirds. Extremely tense, used as a passing chord. For guitarists, mastering the Fdim7 chord unlocks many songs in the key of F.
Recommended Fdim7 Guitar Voicing
The interactive fretboard above shows a practical Fdim7 voicing. The chord notes (F, G#, B, D) appear as highlighted positions. Tap any highlighted fret to hear that note, or click "Play Fdim7" to hear the full chord.
Interval Structure of Fdim7
| Degree | Interval | Semitones | Note in F |
|---|---|---|---|
| Root | Root (R) | 0 | F |
| 3rd | Minor 3rd | 3 | G# |
| 5th | Tritone | 6 | B |
| 7th | Major 6th | 9 | D |
Common Progressions with Fdim7 on Guitar
- I–IV–V: Fdim7 – A#dim7 – Cdim7 (foundation of blues and rock)
- I–V–vi–IV: Fdim7 – C – Dm – A# (modern pop staple)
- I–vi–IV–V: Fdim7 – Dm – A# – C (50s doo-wop)
Tips for Practicing Fdim7 on Guitar
Start by finding the root note F on the 6th and 5th strings. Build the chord shape from there. Practice transitioning between Fdim7 and nearby chords like A# and C. Use slow, deliberate strums and check each string rings clearly.