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.
Fmaj11 is F, A, C, E, G and Bb — Fmaj9 with the eleventh added — the note that fights the major third.
It sounds unsettled, and grittier than the rest of the major family. Most players drop the third or raise the eleventh instead, which is how you arrive at a sus chord or at maj7♯11.

| F | A | C | E | G | Bb |
|---|---|---|---|---|---|
| 1 | 3 | 5 | 7 | 9 | 11 |
Tonic, awkwardly — the eleventh sits a semitone above the third.
Also written FM11, FΔ11 or F major 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.
Fmaj11 has 5 of them, on strings 6-5-4-3-2-1, strings 5-4-3-2-1, strings 6-5-4-3-2, the middle four strings and the bottom four strings, from the 3rd fret up to the 5th — every inversion the chord has: A in the bass and E in the bass. The one to learn first is the E shape at the 3rd fret, which is the easiest grip here.
Start with xx3355 — no barre and low, at the 3rd fret. None of the shapes for Fmaj11 uses an open string, so every one of them is movable; the lowest sits at the 1st fret. 4 of the 8 need a barre. Together they cover the neck from the 1st fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| 112211 | 1st fret | F, root position | F | barred |
| 112213 | 1st fret | F, root position | G | barred |
| xx3355 | 3rd fret | F, root position | A | all fretted |
| x87966 | 6th fret | F, root position | Bb | all fretted |
| x-8-8-9-10-8 | 8th fret | F, root position | C | barred |
| 13-12-14-0-11-0 | 11th fret | F, root position | Bb | 2 open strings |
| 13-12-x-x-11-12 | 11th fret | F, root position | E | all fretted |
| 13-13-14-14-13-13 | 13th fret | F, root position | F | barred |
The same notes rebuilt from scratch give 6 shell, 13 drop 2, 8 drop 3 and 24 rootless voicings, each on its own page.
Tensions. A shell of Fmaj11, root, third and seventh, leaves a string free, and the tones that belong over it are the 13 (D).
How you get to it. The turn that lands on Fmaj11 is Gm7 to C7 — the ii and the V of F — and C7 shares its third and seventh with Gm7, so the hand barely moves between them.
In which keys. Every note of Fmaj11 belongs to D minor (the ♭III) and F major (the I, the tonic).
Every note of Fmaj11 is in F major.
Change one note of Fmaj11 and you have Fmaj9 (drop the fourth), Fmaj13 (the fourth becomes a sixth) or FmMaj11 (the major third becomes a minor third).
Fmaj11 is a major chord — root, major third, fifth. Major chords on every root.
On Fmaj11’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.