Chord · 11ths

A11 — A Dominant 11th

A11 is the A dominant 11th chord. It is built on the root A with major 3rd (C♯), perfect 5th (E), minor 7th (G), major 9th (B) and perfect 11th (D) above it — the formula 1 3 5 ♭7 9 11, sounding the notes A C♯ E G B D. On the piano it sits at A (octave 3) and above in the library's voicing; the same 6 notes in any octave are still A11.

Root
A
Quality
Dominant 11th
Formula
1 3 5 ♭7 9 11
Notes
A C♯ E G B D

On the keyboard

A11 on the piano keyboard: A C♯ E G B DAC♯EGBD

The notes of A11

DegreeNoteInterval from the rootPitch
1ArootA3
3C♯major 3rdC♯4
5Eperfect 5thE4
♭7Gminor 7thG4
9Bmajor 9thB4
11Dperfect 11thD5

Other 11ths on A

Amaj11Am11Am11♭5A7♯11Amaj7♯11Amaj9♯11

Dominant 11th chords on every root

C11D♭11D11E♭11E11F11F♯11G11A♭11B♭11B11

Part of the chord reference. See also the scales and the keys.