Bdim Chord on Guitar

1,008 guitar chords with several shapes each, finger numbers, difficulty and real sound, in any tuning.

Bdim is a diminished chord made of 3 notes: B, D, F. It sounds tense and unstable, and you hear it in passing chords between two others, and the vii chord of a major key. It is the vii° chord of C major and turns up in 1 other key.

The library above opens on Bdim with 14 shapes up and down the neck, starting with hand-checked ones. Tap a shape to hear it, or play it one string at a time.

Notes in Bdim

NoteDegreeInterval from BSemitones
B1root0
D♭3minor third3
F♭5diminished fifth6

Formula: 1 – ♭3 – ♭5.

How to play Bdim

1243
Fret 2Easyx2343x
7fr123
E-shape barre at fret 7Easy7897xx
231
Open positionEasyx20401
321
Fret 1Easyxxx431
7fr132
Fret 7Beginner78070x
6fr321
Fret 6Easyxx976x

Fret 7 (root on the 6th string), step by step

  1. 1st finger (index): 6th string, 7th fret (B, the root).
  2. 2nd finger (middle): 3rd string, 7th fret (D, the minor third).
  3. 3rd finger (ring): 5th string, 8th fret (F, the flat fifth).
  4. Let the 4th string, 2nd string ring open (D, B).
  5. Strum from the 6th string, and keep the 1st string quiet (touch the muted string lightly with the finger next to it).

Tips

The fret 7 shape is the one to learn first. Once it is easy, try the shape at the 7th fret (7897xx): the same chord, higher and brighter, handy when the chords before and after it sit up the neck.

Keys and progressions with Bdim

Bdim belongs to 2 keys: vii° in C major, ii° in A minor. In C major, try I–V–vi–IV: C – G – Am – F.

Common questions

What notes are in Bdim?

B, D, F: the root, minor third, flat fifth.

What is the easiest way to play Bdim?

Fret 7: 78070x (low string first), rated Beginner.

What is the difference between Bdim and Bdim7?

Bdim has the same notes where Bdim7 has A♭. Bdim sounds tense and unstable; Bdim7 sounds spooky and suspenseful.

Is Bdim a hard chord?

No. The easiest shape is rated Beginner and needs 3 fingers.

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