Chord Formulas

Chord Type Symbol Formula
Major M, Maj 1-3-5
Added Fourth add4 1-3-4-5
Sixth 6 1-3-5-6
Six Nine 6/9 1-3-5-6-9
Major 7th Maj7 1-3-5-7
Major Ninth Maj9 1-3-5-7-9
Major Eleventh Maj11 1-3-5-7- (9)-11
Major Thirteenth Maj13 1-3-5-7-(9)-(11)-13
Major seven
sharp eleventh
Maj7#11 1-3-5-7- #11
Major Flat Five - 1-3-b5

Chord Type Symbol Formula
Minor m 1-b3-5
Minor added fourth madd4 1-b3-4-5
Minor sixth m6 1-b3-5-6
Minor seventh m7 1-b3-5-b7
Minor added ninth madd9 1-b3-5-9
Minor six add nine m6/9 1-b3-5-6-9
Minor ninth m9 1-b3-5-b7-9
Minor eleventh m11 1-b3-5-b7-(9)-11
Minor thirteenth m13 1-b3-5-b7-(9)-(11)-13
Minor/Major seventh m/Maj7 1-b3-5-7
Minor/Major ninth m/Maj9 1-b3-5-7-9
Minor/Major eleventh m/Maj11 1-b3-5-7-(9)-11
Minor/Major thirteenth m/Maj13 1-b3-5-7-(9)-(11)-13
Minor seven flat fifth m7-5 or 1-b3-b5-b7
Chord Type Symbol Formula
Seventh 7 1-3-5-b7
Ninth 9 1-3-5-b7-9
Eleventh 11 1-(3)-5-b7-(9)-11
Thirteenth 13 1-3-5-b7-(9)-(11)-13
Seven sharp five 7#5 1-3-#5-b7
Seven flat five 7b5 1-3-b5-b7
Seven flat ninth 7b9 1-3-5-b7-b9
Seven sharp ninth 7#9 1-3-5-b7-#9
Nine sharp five 9#5 1-3-#5-b7-9
Nine flat five 9b5 1-3-b5-b7-9
Seven sharp five sharp nine 7#5#9 1-3-#5-b7-#9
Seven sharp five flat nine 7#5b9 1-3-#5-b7-b9
Seven flat five sharp nine 7b5#9 1-3-b5-b7-#9
Seven flat five flat nine 7b5b9 1-3-b5-b7-b9
Seven sharp eleven 7#11 1-3-5-b7-#11

Diminished dim ( ) 1-b3-b5
Diminished Seventh dim7 (7) 1-b3-b5-bb7
Augmented aug (+) 1-3-#5

This section contains diadic "fifth" (2 note 'chords'),
the "Sus" chords, and the #11. A #11 contains a perfect fifth
as well as a sharp eleven, (which is the same note as a flat five but an octave higher).
These chords do not have a Major or Minor tonality, since there is no 3rd. However the #11 chord does have a Lydian sound.
Chord Type Symbol Formula
Fifth 5 1-5
Flat Fifth -5 1-b5
Suspended Fourth sus4 1-4-5
Suspended Second sus2 1-2(9)-5
Sharp Eleven #11 1-5-#11