The root left to the bass player. Frees a finger for a tension.
C#m11 is C#, E, G#, B, D# and F# — C#m9 with the eleventh added on top.
It sounds spacious and slightly unresolved. The eleventh is a whole step above the minor third, so unlike its major counterpart it fits without a fight.
Pre-dominant or minor tonic — it hangs rather than moves.

| C# | E | G# | B | D# | F# |
|---|---|---|---|---|---|
| 1 | ♭3 | 5 | ♭7 | 9 | 11 |
Also written C#min11, C#-11 or C# minor 11. The same chord either way; which spelling you meet depends on who wrote the chart.
Leave the root to the bass player. In a band nobody misses it, and the ear supplies it from the guide tones anyway.
The finger it frees goes to a tension, which is why these sound richer than the shape they came from rather than thinner.
C#m11 has 22 of them, on the top four strings, the middle four strings and strings 5-3-2-1, from open position up to the 11th — every inversion the chord has: E in the bass, G# in the bass, B in the bass, D# in the bass and F# in the bass. The one to learn first is the E shape at the nut, which is the easiest grip here.
8 of them sit on the top four strings, so you can run the inversions up one set without changing strings — which is the whole reason to learn them as a family rather than as separate grips.
Six notes and four fingers, so something has to go. Keep E and B (they fix the quality) and F# and D# (what the symbol is about). Let G# and C# go, in that order — a perfect fifth says nothing the root has not, and in a band the bass has the root.
Play C#m11 as a shell — root, third and seventh — and the spare string takes the 13 (A#).
All 7 common shapes as fret numbers, lowest string first. Hover or tap one to see it drawn.
How you get to it. The turn that lands on C#m11 is D#m7♭5 to G#7♭9: the ii and the V of C# minor, which is where a minor tonic is usually arrived at rather than simply begun on.
In which keys. Every note of C#m11 belongs to C# minor (the i, the tonic), E major (the vi, the submediant), Ab minor (the iv, the subdominant) and B major (the ii, the supertonic).
Every note of C#m11 is in C# dorian and C# natural minor.
Change one note of C#m11 and you have C#m9 (drop the eleventh) or C#mMaj11 (the flat seventh becomes the major seventh).
C#m11 is a minor chord — root, minor third, fifth. Minor chords on every root.
The common shapes and the derived voicings come from different places, and both are explained in how this site is built.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.