An open string left ringing against a fretted grip. Because it costs no finger, it sounds a note the closed shape has none left for -- a tension on top, or a pedal root underneath. Either a familiar grip with open strings added, or a shape so sparse the open strings carry the chord. These belong to their key rather than to a shape, so D, A, G and E have many and Eb a handful.
F#11 is F#, C#, E, G# and B — F#9 with the eleventh added, and the third usually dropped.
It sounds suspended rather than tense. The eleventh sits a semitone above the major third, so the third is usually dropped; some shapes here keep it anyway.

| F# | C# | E | G# | B |
|---|---|---|---|---|
| 1 | 5 | ♭7 | 9 | 11 |
Dominant — but effectively a sus chord with a ninth.
Also written F#9sus4 or F# dominant 11. The same chord either way; which spelling you meet depends on who wrote the chart.
An open string left ringing against a fretted grip. It costs no finger, so it can sound a note the closed shape has none left for: a tension on top, or a pedal root underneath.
These belong to their key rather than to a shape: they cannot be moved up the neck. D, A, G and E have many; E♭ has a handful.
F#11 has 4 of them, on the top four strings, strings 6-4-3-2 and strings 6-4-3-2-1, from the 4th fret up to the 6th — every inversion the chord has: F# in the bass, E in the bass and G# in the bass. The one to learn first is the F# shape at the 4th fret, which is the easiest grip here.
Start with 212100 — no barre and 2 open strings. 1 of the 6 shapes here sits in open position. 3 of the 6 need a barre. Together they cover the neck from the 1st fret to the 13th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| 212100 | open position | F#, root position | E | 2 open strings |
| 222322 | 2nd fret | F#, root position | F# | barred |
| 444456 | 4th fret | G#, 9th in the bass | Bb | barred |
| x98977 | 7th fret | F#, root position | B | all fretted |
| x-9-9-9-11-9 | 9th fret | F#, root position | C# | barred |
| x-13-11-11-12-12 | 11th fret | A# | E | all fretted |
The same notes rebuilt from scratch give 24 drop 2, 16 drop 3 and 14 rootless voicings, each on its own page.
F#11 is the V of B, and that is where it goes if it goes anywhere: the third and the flat seventh are a tritone apart, and both resolve by a semitone into B.
Voice by voice, F#11 → B. One voice moves by a semitone, and 2 notes are common to both chords.
| In F#11 | Moves | In B |
|---|---|---|
| F#, the root | stays where it is | F#, the fifth |
| C#, the fifth | falls a whole tone | B, the root |
| E, the flat seventh | falls a semitone | D#, the major third |
| G#, the ninth | falls a whole tone | F#, the fifth |
| B, the eleventh | stays where it is | B, the root |
In which keys. Every note of F#11 belongs to C# minor (the iv), E major (the ii), F# minor (the i), Ab minor (the ♭VII), A major (the vi) and B major (the V).
Every note of F#11 is in F# mixolydian, F# dorian and F# natural minor.
Change one note of F#11 and you have F#sus2sus4 (drop the flat seventh), F#m9 (the fourth becomes a minor third), F#m11 (add the minor third), F#7sus4 (drop the ninth) or F#9 (the fourth becomes a major third).
F#11 is a dominant chord — root, major third, fifth, minor seventh. Dominant seventh chords on every root.
On F#11’s sound and use this page follows Barrie Nettles & Richard Graf, The Chord Scale Theory and Jazz Harmony (Advance Music, 1997). 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.