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F Diminished Chord: Guitar, Piano and Notes

The F Diminished chord is built on the root note F. Its notes are F, A♭ and C♭.

Transpose
Quality
Short answer

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.

Notes
F · A♭ · C♭
Formula
1 · ♭3 · ♭5
Semitones
0 · 3 · 6
Note
F
Quality
Diminished
Symbol
F°

F Diminished on piano

3 notes
View:
Piano diagram of the F Diminished chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play F Diminished on piano, place your right hand with your thumb on F, middle finger on A♭ and little finger on C♭. Press the keys together and listen for an even sound. On the keyboard A♭ is a black key and F and C♭ are white. C♭ is the key you'd normally call B. Practice moving in and out of the chord slowly, then bring in a metronome.

  • F1
  • A♭♭3
  • C♭♭5

F Diminished on guitar

View:
Guitar chord diagram of the F Diminished chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, F Diminished is commonly played with the voicing shown above. This one is a barre at fret 1: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them. Don't play strings 2 and 1.

F · A♭ · C♭

Try F Diminished on the virtual piano

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F Diminished chord notes

DegreeIntervalSemitonesNoteHear
1Root0F
♭3Minor third3A♭(Ab)
♭5Diminished fifth6C♭(Cb)

How to use the F Diminished chord

The F Diminished chord is built from a root, a minor third and a diminished fifth. Start at the root F and stack the intervals to get the whole chord: F, A♭ and C♭. The same formula gives you the chord in any other key.

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

In major keys F° is the vii° in G♭ major; in minor keys it's the ii° in E♭ minor.

How F Diminished differs from similar chords

F° is Fm with the fifth lowered by a half step, and that flat fifth is the whole difference. Add a minor seventh and you get Fm7♭5, add a diminished seventh and you get the fully symmetrical F°7. On its own it is the leading-tone chord (vii°) of the major key a half step up.

Where F Diminished is used

A diminished chord is a tension chord. It works as the leading-tone chord of a key, and as a dominant seventh with its root left out.

As the leading-tone chordG♭ major
  1. vii°F°
  2. IG♭

Every note pulls inward into G♭ by a semitone or a tone. This is the chord's primary function.

As the ii in a minor ii-V-iE♭ minor
  1. ii°F°
  2. V7B♭7
  3. iE♭m

The minor cadence. F Diminished leads into the dominant, and the seventh is what makes it a ii rather than a diminished triad.

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.

Questions people ask

What notes are in the F Diminished chord?
The F Diminished chord contains F, A♭ and C♭ (F, Ab and Cb 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.
What key is the F Diminished chord in?
In major keys F° is the vii° in G♭ major; in minor keys it's the ii° in E♭ minor.
How do you play F Diminished on piano?
Place your fingers on F, A♭ and C♭ and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right. On the keyboard A♭ is a black key and F and C♭ are white. C♭ is the key you'd normally call B.
How do you play F Diminished on guitar?
Use the fingering in the diagram above. This one is a barre at fret 1: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them. Don't play strings 2 and 1.
What chords work well with F Diminished?
F Diminished pairs naturally with the chords in the related section: a perfect fifth up or down, the relative major or minor, and anything sharing two notes with it.