C#11 Chord on Guitar
C#11 = C# – F – G# – B – D# – F# (Root, Major 3rd, Perfect 5th, Minor 7th, Major 9th, Perfect 11th)
C#11 runs into the same problem every extended dominant eventually hits: the eleventh sits a half step above the major third, and stacking both together produces a genuine clash rather than a richer sound. The fix guitarists and pianists both use is to drop the third outright, and at the ninth fret that means this voicing barely resembles a conventional major-rooted chord at all.
The full theoretical stack — C#, F, G#, B, D#, F# — collapses in practice down to root, flat seventh, and eleventh, with the third, fifth, and ninth all left out. Without a third present, C#11 leans much closer to a suspended 7sus4 color than to anything clearly major, functioning less as a harmonically defined chord and more as an open, ambiguous rhythmic texture — exactly the role it plays in jazz-funk and gospel-flavored vamps that stay parked on one chord for a while.
Fingerings
Barre (9th fret)
How to Practice It
Because so much of the theoretical stack gets stripped away, the actual fingering is simpler than the chord's five-syllable name suggests, with most of the shape riding flat across the barre and only a single note fretted independently. What takes real practice is training the ear to accept how open and unresolved this sounds compared to a normal major chord, since a player expecting a bright, settled sound will be thrown by how suspended an 11th chord actually feels.
Common Progressions
- C#11 – F# (V11 – I, an 11th chord easing into resolution)
- C#11 – C#7 – F# (moving from suspended color into full resolution)
- G# – C#11 – F# (a jazz-funk cadence built on the 11th's ambiguity)
- D#m7 – C#11 – F# (ii7 – V11 – I in F# major)
FAQ
- Why does the C#11 voicing skip the third entirely?
- The eleventh sits only a half step above the major third, and playing both at once produces a harsh clash, so the standard fix — used on guitar and piano alike — is to drop the third and let the eleventh stand alone.
- Does C#11 read as major or minor to the ear?
- Neither clearly — with no third present, it sits in an ambiguous, suspended zone closer to a sus4-flavored dominant seventh than to a fully spelled triad of either quality.
- Is C#11 mechanically difficult to finger?
- Less than its name implies — with the third, fifth, and ninth all dropped, the shape actually needs fewer independently fretted notes than several simpler-sounding chords in this same cluster.
- Where does an 11th chord like this typically get used musically?
- Jazz-funk and gospel-influenced rhythm playing lean on it heavily, using its open, unresolved character to add harmonic interest during sections that vamp on one chord rather than moving quickly through changes.
- What does C#11 resolve to?
- Its most natural destination is F# major, following the same dominant-to-tonic relationship a plain C#7 would have, though the suspended color often lingers before any resolution actually lands.
- How is C#11 different from C#7sus4?
- The two sound closely related on guitar, but 11 formally implies a ninth in its theoretical stack even though guitar voicings drop it, while 7sus4 is built directly from a suspended fourth with no ninth implied at all.
- Why is C#11 sometimes written without a clear key context at all?
- Its ambiguous, third-less color means it can sit comfortably over more than one underlying harmony, which is part of why jazz-funk charts sometimes leave it as a static vamp symbol rather than tying it to one specific resolving key.
Related: how chords are built, chord finder.