F♯ Diminished Chord

The F♯ Diminished chord is a diminished chord built on the root note F♯. Its notes are F♯, A and C. It is enharmonically the same chord as G♭ Diminished.

Diminished chords sound unstable and suspenseful. Two stacked minor thirds create a tight, dissonant tension that composers use for passing chords, horror scores and dramatic turnarounds.

F♯ Diminished on piano

Piano diagram of the F♯ Diminished chordCACAF♯F♯F♯ DiminishedF♯ · A · C

To play F♯ Diminished on piano, place your right-hand thumb on F♯, middle finger on A, and little finger on C. Press all keys at the same time and listen for a clear, balanced sound. Practice switching to and from this chord slowly, then with a metronome at a comfortable tempo.

F♯ Diminished on guitar

Guitar chord diagram of the F♯ Diminished chordF♯ Diminished

On guitar, F♯ Diminished is commonly played with the voicing shown above. If the chord contains barred notes, keep your index finger flat across the fretboard and curve the other fingers so they do not mute the open strings. Strum only the strings marked as active in the diagram for the cleanest tone.

Play the chord

F♯ Diminished
F♯ · A · C

F♯ Diminished chord notes

Formula: 1 · ♭3 · ♭5Notes: F♯ · A · CAlso known as: G♭ Diminished
DegreeIntervalSemitonesNote
1Root0F♯(F#)
♭3Minor third3A
♭5Tritone6C

How to use the F♯ Diminished chord

The F♯ Diminished chord is built from a root, a minor third and a diminished fifth. Starting from the root F♯, stack the intervals to get the complete chord: F♯, A and C. Learning the formula is the fastest way to transpose the chord to any other key.

Diminished chords are passing tools in classical, jazz, bluegrass and film music. They are often used as vii° leading to the tonic or as chromatic passing chords between diatonic chords.

Common progressions

The F♯ Diminished chord works beautifully in these progressions. Click a chord name to jump to its page.

Leading-tone resolution
vii° → I
F♯°G
Minor ii-V-i
ii° → V → i
F♯°B7Em
Chromatic passing chord
I → vii° → vi
GF♯°Em

Scales that contain F♯°

These scales include F♯° as one of their diatonic chords. Use them to find melodies and improvisation ideas that fit perfectly.

Once you are comfortable with F♯ Diminished, explore neighbouring chords to unlock new progressions. The chords below share notes, keys or functions with F♯ Diminished and are a natural next step in your practice.

Frequently asked questions

What notes are in the F♯ Diminished chord?
The F♯ Diminished chord contains F♯, A and C (F#, A and C in plain text).
Is the F♯ Diminished chord major or minor?
F♯ Diminished is a diminished chord. Diminished chords sound unstable and suspenseful. Two stacked minor thirds create a tight, dissonant tension that composers use for passing chords, horror scores and dramatic turnarounds.
How do you play F♯ Diminished on piano?
Place your fingers on F♯, A and C and play the notes together. On piano, the root is usually played with the little finger of the left hand and the upper notes with the right hand.
How do you play F♯ Diminished on guitar?
F♯ Diminished is typically played using the fingering shown in the interactive diagram above. You can also try an open position if one of the chord tones lines up with an open string.
What is another name for the F♯ Diminished chord?
F♯ Diminished is enharmonically equivalent to G♭ Diminished. Both chord names describe exactly the same notes, but the spelling depends on the key you are playing in.

Keep exploring

Deepen your understanding of the F♯ Diminished chord with our other music theory tools.