The standard grips this chord is usually shown with.
C6 is C, E, G and A — C with a major sixth added on top.
It sounds warm, and finished without being sweet. It closes a tune as firmly as the triad does but without the maj7’s shine, which is why so many standards end on one.

| C | E | G | A |
|---|---|---|---|
| 1 | 3 | 5 | 6 |
Tonic — an ending chord.
Also written Cmaj6, CM6 or C major 6. The same chord either way; which spelling you meet depends on who wrote the chart.
C6 in 1st inversion puts E in the bass instead of C, the 3rd of the chord. The notes are the same; what changes is what the bass line does, which is most of why you would reach for it — it lets the lowest voice move by step where the root would have jumped.
One of C6’s 10 common shapes does this: x75555.
Start with x32210 — no barre and 1 open string. 1 of the 10 shapes here sits in open position. 4 of the 10 need a barre. Together they cover the neck from the 1st fret to the 15th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x32210 | open position | C, root position | E | 1 open string |
| x35555 | 3rd fret | C, root position | A | barred |
| x75555 | 5th fret | E, 1st inversion | A | barred |
| 877555 | 5th fret | C, root position | A | barred |
| 575585 | 5th fret | A, 6th in the bass | A | barred |
| 8x798x | 7th fret | C, root position | G | all fretted |
| 8-x-10-9-10-8 | 8th fret | C, root position | C | all fretted |
| 8-10-x-9-10-8 | 8th fret | C, root position | C | all fretted |
| x-x-10-12-10-12 | 10th fret | C, root position | E | all fretted |
| x-15-14-14-13-x | 13th fret | C, root position | C | all fretted |
The same notes rebuilt from scratch give 5 shell, 15 drop 2, 10 drop 3 and 6 open string voicings, each on its own page.
Tensions. A shell of C6, root, third and seventh, leaves a string free, and the tones that belong over it are the 9 (D) and the #11 (F#).
How you get to it. The turn that lands on C6 is Dm7 to G7 — the ii and the V of C — and G7 shares its third and seventh with Dm7, so the hand barely moves between them.
In which keys. Every note of C6 belongs to C major (the I), D minor (the ♭VII), E minor (the ♭VI), F major (the V), G major (the IV) and A minor (the ♭III).
Every note of C6 is in C major pentatonic, C major, C lydian, C mixolydian and C lydian dominant.
Change one note of C6 and you have C (drop the sixth), Cmaj7 (the sixth becomes a major seventh), Cm6 (the major third becomes a minor third), Cadd9 (the sixth becomes a ninth), C69 (add the ninth) or C7 (the sixth becomes a flat seventh).
C6 is a major chord — root, major third, fifth. Major chords on every root.
On C6’s sound and use this page follows Mark Levine, The Jazz Piano Book (Sher Music, 1989). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.