Dominant 11th
11
0 - 4 - 7 - 10 - 14 - 17Dom9 + perfect 11th
About Dominant 11th
A dominant eleventh chord is a six-note chord built from a dominant ninth plus an eleventh — in C that is C, E, G, B♭, D and F, written C11. In theory it stacks every odd degree up to the eleventh; in practice the third is always dropped, because F and E cannot sound together, and what players call C11 is a chord without a third at all.
Notes and formula
The formula on paper is 1 – 3 – 5 – ♭7 – 9 – 11, or 0 – 4 – 7 – 10 – 14 – 17 in semitones. Six notes, which is already more than most instruments can voice cleanly.
The problem is the eleventh against the third. F sits a semitone above E once the octave is folded away, and that minor ninth between two chord tones is the harshest collision available inside a single chord. Every practical account of the chord starts by removing one of the two, and it is always the third that goes.
What is actually played
Remove the third and C11 becomes C, G, B♭, D, F — which is a G minor seventh sitting on a C bass. That is how arrangers write it and how bass players read it: the symbol Gm7/C means the same sound as C11 and is easier to voice.
It is also identical in content to C9sus4. The three names describe one chord from three directions — as a stack of thirds, as a slash chord, and as a suspension — and which one appears on a chart says more about the idiom than about the music.
How to play it
On guitar the working form is x3333x, sounding C–F–B♭–D. One finger flat across the fifth fret area covers it, which is why it turns up in gospel and soul comping so often.
On piano the reliable voicing is a bass C in the left hand and a plain G minor seventh in the right. Anything that tries to include E as well will need to keep it far below F, and even then the chord loses its openness.
What it does
A dominant eleventh is a dominant with the tension taken out. Without the third there is no tritone, so the chord does not pull the way C7 does; it hangs. Gospel and soul use it as a chord to sit on before the resolution finally arrives, often for a whole bar or two.
The classic move is to resolve it into the plain dominant: C11 to C7 to F. The F in the upper voice steps down to E, the missing third arrives, and the tritone appears at the last moment — a suspension played out over three chords instead of two beats.
Eleventh, sharp eleventh and sus4
The natural eleventh is only a problem over a major third, which is why a minor eleventh chord has none: Cm11 contains E♭ and F comfortably. Over a dominant, players who want an eleventh without losing the third raise it — C7♯11, where F♯ sits far enough from E to be a colour rather than a clash.
The sus4 family solves it the other way: 7sus4 replaces the third with the fourth and adds no ninth, which is C11 with one fewer note. All of these are answers to the same structural question.
Scales that contain it
Mixolydian contains every note of the chord, including the eleventh, and is the default choice. The absent third means the scale's own third can be used freely in a melody without contradicting the harmony.
Because the played chord is a minor seventh over a foreign bass, Dorian on G works equally well over a C11 and is how many players think about it — the same notes, arranged around the chord that is actually being fingered.
Frequently asked questions
What notes are in a C11 chord?
In full, C, E, G, B♭, D and F — but the third is dropped in practice, leaving C, G, B♭, D and F. That is the chord guitarists play as x3333x.
Why is the third left out of an eleventh chord?
The eleventh sits a semitone above the third once the octave is folded in, and that collision is the harshest inside any chord. Removing the third is the standard fix; removing the eleventh would leave a plain ninth chord.
Is C11 the same as Gm7/C?
As played, yes. C11 without its third is C in the bass under a G minor seventh, and the same sound is also written C9sus4. The choice of symbol reflects the style of the chart rather than a difference in the notes.