urTuner

Cdim7 Guitar Chord

C diminished seventh (Cdim7) is made of the notes C E♭ G♭ B♭♭. Here are 3 ways to play it on guitar, starting with the easiest.

How to play Cdim7 on guitar

  1. Shape 1

    Barre at fret 1

    1 4 2 3 C E♭ B♭♭ C G♭

    x31212

  2. Shape 2

    Barre at fret 8

    8fr 1 2 3 4 C G♭ C E♭ B♭♭ C

    8-9-10-8-10-8

  3. Shape 3

    Barre at fret 13

    13fr 1 4 2 3 C E♭ B♭♭ C G♭

    x-15-13-14-13-14

Notes in Cdim7

Formula 1 ♭3 ♭5 ♭♭7
DegreeNote
1C
♭3E♭
♭5G♭
♭♭7B♭♭

Shape 1 step by step

  1. Lay your index finger flat across strings 4 to 2 at fret 1.
  2. Put your little finger on string 5 at fret 3.
  3. Put your middle finger on string 3 at fret 2.
  4. Put your ring finger on string 1 at fret 2.
  5. Don’t play string 6.
  6. Strum from string 5 to string 1.

Shape 2 step by step

  1. Lay your index finger flat across strings 6 to 1 at fret 8.
  2. Put your middle finger on string 5 at fret 9.
  3. Put your ring finger on string 4 at fret 10.
  4. Put your little finger on string 2 at fret 10.
  5. Strum from string 6 to string 1.

Tune your guitar first

A chord only sounds right when your instrument is in tune. Check your strings with the free online tuner before you practise. Open the guitar tuner

Frequently asked questions

What notes are in the Cdim7 chord?

C diminished seventh has the notes C E♭ G♭ B♭♭. Its formula is 1 ♭3 ♭5 ♭♭7. The numbers are steps of the major scale, counted from the root.

What is the easiest way to play Cdim7 on guitar?

Start with shape 1 (barre at fret 1), written as x31212 from string 6 to string 1. Here x means you don’t play that string and 0 means it rings open.

What is the difference between Cdim7 and Cm7♭5?

Cdim7 has the notes C E♭ G♭ B♭♭, and Cm7♭5 has C E♭ G♭ B♭. The only difference is that Cdim7 has B♭♭ where Cm7♭5 has B♭.

Diminished 7th chords in every key

More tuners

Music tools

Browse all 200 tuners & tools