Chord · Triads

Fdim — F Diminished

Fdim is the F diminished chord. It is built on the root F with minor 3rd (A♭) and diminished 5th (C♭) above it — the formula 1 ♭3 ♭5, sounding the notes F A♭ C♭. On the piano it sits at F (octave 4) and above in the library's voicing; the same 3 notes in any octave are still Fdim.

Root
F
Quality
Diminished
Formula
1 ♭3 ♭5
Notes
F A♭ C♭

On the keyboard

Fdim on the piano keyboard: F A♭ C♭135FA♭C♭

Right-hand fingering for this voicing: 1–3–5 (1 is the thumb).

The notes of Fdim

DegreeNoteInterval from the rootPitch
1FrootF4
♭3A♭minor 3rdA♭4
♭5C♭diminished 5thC♭5

Other triads on F

Diminished chords on every root

Part of the chord reference. See also the scales and the keys.