F Diminished Guitar Chord

RRootm3Minor 3rd♭5Tritone
Explore Fdim in Chord8 →

Voicing Positions (6)

R♭5Rm3××1 2 3 1 x x
R♭5Rm3♭5R1 2 3 1 0 1
8m3♭5R♭513 11 9 10 0 13
8m3♭5♭513 11 9 13 0 13
12R♭5Rm3♭5R13 14 15 13 0 13
12R♭5Rm3♭5m313 14 15 13 0 16

Interval Colors

In Chord8, every interval has a unique color. The colors follow the function of each note relative to the root — so they change when you switch chords.

R
Root
m2
Minor 2nd
M2
Major 2nd
m3
Minor 3rd
M3
Major 3rd
P4
Perfect 4th
♭5
Tritone
P5
Perfect 5th
m6
Minor 6th
M6
Major 6th
m7
Minor 7th
M7
Major 7th

F Diminished Chord

The F Diminished chord is built from the intervals: Root, Minor 3rd, and Tritone. It contains the notes F, G#, and B. This is a diminished triad — one of the foundational chord types.

What F Diminished Is

The F Diminished is a diminished triad — a stack of two minor thirds. Both intervals are minor, which makes the chord sound deeply unstable. Diminished triads function as the seventh degree of major scales and the second degree of minor scales; they almost never act as a final resting point but instead pull strongly toward whatever chord lives a half-step above their root.

How F Diminished Sounds

A F Diminished sounds tense and incomplete. The diminished fifth is one of the most unstable intervals in tonal music, and stacking two minor thirds doubles down on the unease. In a piece of music a F Diminished almost always wants to move somewhere — most often a half-step up or down to the nearest stable chord.

How To Use F Diminished In A Progression

Diminished triads and seventh chords most often function as passing harmony. They lead from one stable chord to another, usually by half-step. In jazz, fully diminished seventh chords are also used as substitutes for dominant seventh chords with a flat ninth — they share three notes and resolve to the same place.

Playing F Diminished On Guitar

On guitar, the most common voicings of F Diminished use the open position when possible (which is why guitarists tend to favour keys like E, A, D, G, and C) and movable barre or half-barre shapes everywhere else. The voicing diagrams above show several practical positions across the neck — the open or low-fret voicings will sound brightest, while the higher voicings will have a thinner, more focused tone. Always experiment with which fingering serves the line you are playing.

Keys Containing Fdim

D# minor (ii°)F# major (vii°)

Related Chords

Same root (F)

FFmF7Fmaj7Fm7FaugFsus2Fsus4

Same quality (Diminished)

E DiminishedF# DiminishedG DiminishedA# DiminishedC Diminished

See the music. Every interval has a color.

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