F°
Triads · F root
F°
A tense, unstable triad built from two stacked minor thirds.
0 st3 st6 st
Notes in F°
FRoot
Ab3rd
B5th
F has a warm, slightly rounded quality. Common in classical, jazz, and as the IV chord in C major.
Identify the Chord Quality on F
Each chord below is played on F. Listen and identify whether you heard F°, Fm, F7, or another quality — the hardest and most useful ear training skill.
Diminished in All 12 Keys
Other Chords in F
Related Triads
About the F° Chord
The F° chord is a diminished chord built on F. It contains the notes F, Ab, B — the root, third, and fifth.
A tense, unstable triad built from two stacked minor thirds. Practising the F° chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.