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C7

C7 is a dominant seventh chord made of C–E–G–B♭. Its major third and minor seventh distinguish it from both a major seventh chord and a plain major triad.

C example showing the interval structure of C7, notes C, E, G, B♭
C piano keyboard example showing the interval structure of C7, notes C, E, G, B♭
NotesC · E · G · B♭
Formula1 · 3 · 5 · ♭7
AliasesCdom7

Voice leading

C7 → F

Common tones
C
Moving voice
E → F · B♭ → A

E moves up a semitone to F and B♭ moves down a semitone to A, while C remains as a common tone. This three-note voicing omits G.

C7
F
FAC

Inversions

CEGB♭
EGCB♭
GCEB♭
CEGB♭

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