Chord Reference

Explore all 20 chord types used across Western and contemporary music — from foundational triads and seventh chords to suspended, added tone, and extended harmony. Every chord type includes the complete interval formula, note names in all 12 roots, and inversions. See also the scale reference for scales that use each chord, and the note frequency reference for pitch and frequency data.

Triads

Augmented Triad aug, + Diminished Triad dim, ° Major Triad M, maj, (none) Minor Triad m, min, -

Seventh Chords

Diminished Seventh Chord dim7, °7 Dominant Seventh Chord 7 Half-Diminished Seventh (Minor 7♭5) ø7, m7♭5 Major Seventh Chord maj7, M7, △7 Minor Seventh Chord m7, min7, -7

Minor Variants

Minor Sixth Chord m6, min6 Minor-Major Seventh Chord mMaj7, m△7

Suspended Chords

Suspended 2nd Chord sus2 Suspended 4th Chord sus4, sus

Added Tone Chords

Added 9th Chord add9, add2 Major Sixth Chord 6, maj6 Sixth-Ninth Chord 6/9

Power Chords

Augmented & Extended

Augmented Seventh Chord aug7, +7, 7♯5 Dominant Ninth Chord 9 Major Ninth Chord maj9, M9, △9

Related References

Scale Reference Note Frequencies Key Signatures Interval Reference Theory Hub