This chord has 4 voicings across the fretboard. Use the arrows to see each shape and fingering — and tap any dot on the diagram to hear that note.
Bdim7 Guitar Chord
A fully diminished seventh. Bdim7 is symmetrical and mysterious.
Also known as
- B°7
- B °7
- B dim7
- B diminished 7th
- B diminished seventh
How to Play This Chord
Position your fingers on the fretboard as shown in the diagram. The vertical lines represent the strings, from low E (left) to high E (right), and the horizontal lines are the frets. Numbers inside the dots indicate which finger to use: 1 (index), 2 (middle), 3 (ring), 4 (pinky). An X means don't play that string; an O means play it open. A bar spanning multiple strings means one finger presses across all of them at once — this is known as a barre chord.
Tips & Tricks
This symmetrical chord at the 1st fret (with B on the A string, 2nd fret) is common in jazz and classical music. Bdim7 functions beautifully as a chromatic approach chord to C or Cm, creating smooth voice leading in sophisticated progressions.