F♯dim7 / G♭dim7 Chord on Guitar

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F♯dim7 (also written G♭dim7) is a diminished seventh chord made of 4 notes: F♯, A, C, E♭. It sounds spooky and suspenseful, and you hear it in passing chords, old film scores and dramatic moments; any note of it can be the root.

The library above opens on F♯dim7 with 13 shapes up and down the neck. Tap a shape to hear it, or play it one string at a time.

Notes in F♯dim7

NoteDegreeInterval from F♯Semitones
F♯1root0
A♭3minor third3
C♭5diminished fifth6
E♭𝄫7diminished seventh9

Formula: 1 – ♭3 – ♭5 – 𝄫7. With the other spelling, G♭dim7 is G♭, B𝄫, D𝄫, F𝄫: the same sounds under different names.

How to play F♯dim7

3142
Open positionEasy20121x
4fr1324
Fret 4Easyxx4545
8fr2314
Fret 8Easyx9(10)8(10)x
13fr2413
Fret 13Easy(14)(15)(13)(14)xx
1234
E-shape barre at fret 2Medium23424x
1324
Fret 2Medium23x24x

Open position (root on the 6th string), step by step

  1. 1st finger (index): 4th string, 1st fret (E♭, the diminished seventh).
  2. 2nd finger (middle): 2nd string, 1st fret (C, the flat fifth).
  3. 3rd finger (ring): 6th string, 2nd fret (F♯, the root).
  4. 4th finger (little): 3rd string, 2nd fret (A, the minor third).
  5. Let the 5th string ring open (A).
  6. Strum from the 6th string, and keep the 1st string quiet (touch the muted string lightly with the finger next to it).

Tips

The open position shape is the one to learn first. Once it is easy, try the shape at the 8th fret (x9(10)8(10)x): the same chord, higher and brighter, handy when the chords before and after it sit up the neck.

Where F♯dim7 fits

F♯dim7 is not built from one major or minor scale, so it works as a colour or passing chord. Passing chords, old film scores and dramatic moments; any note of it can be the root.

Common questions

What notes are in F♯dim7?

F♯, A, C, E♭: the root, minor third, flat fifth, diminished seventh.

What is the easiest way to play F♯dim7?

Open position: 20121x (low string first), rated Easy.

What is the difference between F♯dim7 and F♯dim?

F♯dim7 has E♭. F♯dim7 sounds spooky and suspenseful; F♯dim sounds tense and unstable.

Is F♯dim7 a hard chord?

No. The easiest shape is rated Easy and needs 4 fingers.

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