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Guitar chords · Diminished

C° chord on guitar (Cdim)

C° (C ) has three notes: C, E♭ and G♭, the , ♭3 and ♭5.

Shapes

How to play C°

Strum a shape to hear it, or pick it one string at a time. R marks the ; the other numbers are the chord tones.

C° has no common . Play it as the A shape at 3 or the E shape at fret 8. A keeps its fingering anywhere on the neck: slide it up or down and the , on the lowest played string, names the chord.

  • A shape · fret 3

    3fr××R♭5R♭3CG♭CE♭
  • E shape · fret 8

    8fr××R♭5R♭3CG♭CE♭
Name a shape you're holding: the chord finder

Notes and formula

What makes C° diminished

A chord stacks two minor 3rds, so its 5th is a flat. It sounds tense and unstable and is usually a passing chord; in a major key it is the vii° chord.

  • 1Root: the note the chord is named after. Keep it.
  • 3Essential: makes the chord what it is. Never drop it.
  • 5Optional: drop it first when you run out of fingers.

The ♭3rd and the ♭5th make C° a chord.

  1. CRroot
  2. E♭♭3essential
  3. G♭♭5essential
EADGBE0135791215CCCCCCCCG♭E♭G♭E♭G♭E♭G♭E♭E♭G♭E♭G♭G♭E♭G♭
  • C, the root
  • Other chord tones

C° usually resolves up a to D♭ or C♯m, the chord it leads into.

Keys

Keys with C°

C° belongs to three keys: D♭ major (vii°), C♯ minor (vii°, spelled B♯°, ) and B♭ minor (ii°).

Numerals follow the key's own scale, so III, VI and VII in a minor key are its own major chords. A ♭ or ♯ in front marks a chord from outside the key. How Roman numerals work

Slash chords

C° over another bass note

A keeps C° on top and puts another note in the bass: the letter after the slash is the lowest note you play.

  • C°/E♭

    C° with its ♭3rd, E♭, in the bass: the first inversion.

  • C°/G♭

    C° with its ♭5th, G♭, in the bass: the second inversion.

Questions

C°, in short

What notes are in the C° chord?
C° (C ) has three notes: C, E♭ and G♭, the , ♭3 and ♭5.
How do you play C° on guitar?
C° has no common . Play it as the A shape at 3 or the E shape at fret 8.
What key is C° in?
C° belongs to three keys: D♭ major (vii°), C♯ minor (vii°, spelled B♯°, ) and B♭ minor (ii°).
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