C7 chord

C7 chord for guitar in different forms, including open and barre chords.


C7 chord diagram

The most common way to play the chord. Avoid playing on the 6th string. C7 is a four-note chord consisting of C, E, G, Bb (G is sometimes omitted).

Alternative shapes

C7 barre

  • C7 barre shape

C7 barre

  • C7 barre shape


  • C7 voicing

Relevant chords


  • C7sus4 shape


  • C7#9 shape

Theory and information

Try in a chord progression

Dm7 - C7 - Bb - F (see with diagrams in pdf)

Chord names

C7 is a dominant chord. C7/E, C7/G and C7/Bb are inversions of the chord.

Notes in the chord

The notes that the C7 chord consists of are C, E, G, Bb.
To get C9 add D.
To get Cmaj7 replace Bb with B.


The C seventh is constructed with the formula 1-3-5-b7. The 5th is sometimes omitted as in the pictured version below:

C7 chord diagram with intervals


1st inversion: C7/E (means that E is the bass note).
2nd inversion: C7/G (means that G is the bass note).
3rd inversion: C7/Bb (means that Bb is the bass note).
Diagrams of these inversions


C7 (no3) is a C dominant 7th with no third (E).
C7 (no5) is a C dominant 7th with no fifth (G).

Assorted slash chords

Versions with alternate bass notes in short notation:

C7/F: 112010
C7/A: X02310

Alternative chord names

C7/D is theoretically identical with C9/D.

Written in tab format (main version in open position)

- 0 -
- 1 -
- 3 -
- 2 -
- 3 -
- - -

Back to 7th chords