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Chord chart for Fo Guitar Chord (F diminished): Notes, Shapes & How to Play | Guitar Wiz

F diminished guitar shapes

Popular fretboard positions with fingering suggestions

Showing 8 of 44 playable shapes

F diminished guitar chord diagram showing fretboard positions
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About the chord

F diminished guitar chord

Fo is the F diminished guitar chord. It uses the notes F, A♭, and C♭ and the interval formula 1-♭3-♭5.

The F diminished diminished chord is built from minor thirds, including a diminished fifth C♭, producing a tense, unstable sound. This dissonant, unresolved tension is commonly used for dramatic transitions, suspenseful moments, or eerie atmospheres in classical, jazz, and film music.

Also written as Fdim and Fm♭5.

Root note: F
Quality: diminished
Chord tones: 3
Playable shapes: 44

Chord tones

FA♭C♭

Common guitar voicings

These are quick-start shapes for players who want the answer first and the deeper theory second.

Shape 1

xx3101

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  1. 1 Place the 1st finger on the 1st fret of the 3rd string.
  2. 2 Place the 2nd finger on the 1st fret of the 1st string.
  3. 3 Place the 3rd finger on the 3rd fret of the 4th string.
  4. 4 Strum from the 4th string down.

Shape 2

xx3404

View shape
  1. 1 Place the 1st finger on the 3rd fret of the 4th string.
  2. 2 Place the 2nd finger on the 4th fret of the 3rd string.
  3. 3 Place the 3rd finger on the 4th fret of the 1st string.
  4. 4 Strum from the 4th string down.

Notes & Intervals

Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.

F Unison (Root) 1

The root anchors the chord and defines its tonal center.

A♭ Minor Third ♭3

This note supplies the minor color and gives the chord its darker emotional pull.

C♭ Diminished Fifth ♭5

The flattened fifth adds tension and a restless, unstable edge.

Quick answers

What notes are in Fo?

Fo uses the notes F, A♭, and C♭. Its interval formula is 1-♭3-♭5.

What is another name for Fo?

Fo is also written as Fdim and Fm♭5.

How do you play Fo on guitar?

Place the 1st finger on the 1st fret of the 3rd string. Place the 2nd finger on the 1st fret of the 1st string. Place the 3rd finger on the 3rd fret of the 4th string. Strum from the 4th string down.

Related Articles

Articles that reference this chord and explain how to use it in your playing.