B Diminished Chord on Piano
The B Diminished chord contains B, D and F — 3 notes. Every one is marked across three octaves of the keyboard below, labelled with note names and with interval numbers.
- Root
- Minor 3rd
- Augmented 4th
| Degree | 1 | ♭3 | ♯4 |
|---|---|---|---|
| Note | B | D | F |
| Interval | Root | Minor 3rd | Augmented 4th |
Note names

Interval numbers

Scales containing B Diminished
| Major (Ionian) | C |
| Natural Minor (Aeolian) | A |
| Dorian | D |
| Phrygian | E |
| Lydian | F |
| Mixolydian | G |
| Locrian | B |
| Harmonic Lydian (Lydian ♭6) | E♭ |
| Harmonic Minor | C E♭ F# A |
| Melodic Minor | C D |
| Melodic Minor ♯4 | D F A♭ B |
| Gypsy Minor (Hungarian Minor) | E♭ B |
| Dominant Pentatonic (Mixolydian Pentatonic) | G |
| Minor Sixth Pentatonic | D |
| Blues | B |
| Dominant Diminished (M2) | D♭ D E F G A♭ B♭ B |
| Tcherepnin (M3) | D♭ F A |
Circle of fifths
Chords inside B Diminished
No chord in the list has fewer notes than this one.
Frequently asked questions
What notes are in the B Diminished chord?
B, D and F. That is 3 notes.
How is the B Diminished chord built?
From a root of B: D is the minor 3rd and F is the augmented 4th.
Which scales contain the B Diminished chord?
C Major (Ionian), A Natural Minor (Aeolian), D Dorian and E Phrygian, among others. Every note of the B Diminished chord is in those, so they can be played over it.
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