Seventh chords

Seventh chords (7 chords), construction, intervals and types.

The five basic types of 7-chords are:

Seventh chords examples

Chord charts example in the key of A for the five basic seventh chord types.











Click on the chord diagrams above to navigate to the corresponding page for each type of seventh chord.

Seventh chords construction

Construction of seventh chords.

Seventh chords are constructed by adding a major third interval or a minor third interval to a triad.

The added interval (counted from the root) is one of the following:

  • major seventh (7).
  • minor seventh (b7).
  • sixth (minor minor seventh = bb7 = 6).

Major triad to seventh chord

By adding a major third or a minor third to a major triad we get two type of seventh chords – major seventh and dominant seventh.

Construction of a major seventh chord (maj7).

Construction of a dominant seventh chord (7).

Minor triad to seventh chord

By adding a major third to a minor triad we get a minor seventh chord.

Construction of a minor seventh chord (7).

Diminished triad to seventh chord

By adding a major third or a minor third to a diminished triad we get two type of seventh chords – minor seventh flat five and diminished seventh.

Construct a minor seventh flat five chord (m7b5).

Construct a diminished seventh chord (dim7).