The chord notes on the

The notes of the B dim chord
B, D, F
The scale degree of a dim chord
1, ♭3, ♭5 (♭=half step down)
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Display total frets:
BDF  
B dim chord note names

Dim chords in all keys

KeyNotes
Cdim chordC, D♯, F♯
C♯dim chordC♯, E, G
Ddim chordD, F, G♯
D♯dim chordD♯, F♯, A
Edim chordE, G, A♯
Fdim chordF, G♯, B
F♯dim chordF♯, A, C
Gdim chordG, A♯, C♯
G♯dim chordG♯, B, D
Adim chordA, C, D♯
A♯dim chordA♯, C♯, E
Bdim chordB, D, F