The F Diminished chord contains F, A♭, C♭. Formula: 1–♭3–♭5.
The f diminished triad uses a root, minor third and diminished fifth.
Preserve the written spelling C♭ even when it shares a piano key with a simpler enharmonic name.
Choose a position to keep the written notes, sounding keys, bass note, playback and print reference synchronized.
Fdim uses 1–♭3–♭5: F–A♭–C♭.
The f diminished triad uses a root, minor third and diminished fifth.
Compared with F minor, lower the fifth by one semitone.
The chord tones stay the same while the lowest chord tone changes.
| Position | Symbol | Notes, low to high | Bass |
|---|---|---|---|
| Root position, current selection | Fdim | F4–A♭4–C♭5 | F4 |
| First inversion | Fdim/A♭ | A♭4–C♭5–F5 | A♭4 |
| Second inversion | Fdim/C♭ | C♭5–F5–A♭5 | C♭5 |
No independent fingering dataset is authorized for N2B.
Use the written notes, keyboard positions and playback without treating the diagram as a required hand shape.
Read left- and right-hand finger numbersOpen Music Theory
Supports: diminished = minor third + diminished fifth; augmented = major third + augmented fifth; triad spelling principles
Scope limit: Theory and spelling cross-check only; no source prose, artwork, fingering or PDF is copied.
Checked 2026-09-12 · N2B-OMT-TRIADSPianoChord.org
Supports: competitor family coverage; cross-check examples only
Scope limit: Theory and spelling cross-check only; no source prose, artwork, fingering or PDF is copied.
Checked 2026-09-12 · N2B-PC-COLLECTIONF, A♭, C♭.
1–♭3–♭5.
No. The root stays the same; the lowest chord tone changes.
Select the three pitch classes that make Fdim, then check your answer.
This one-octave exercise checks pitch classes. Order and octave do not affect the result; fingering and live performance are not assessed.
One octave, C through B. Select a key again to remove it.
Chord tones: F–A♭–C♭ · Formula: 1, ♭3, ♭5
Dots mark the notes to play. C4 is middle C. Numbers identify octaves, not fingers.