Dominant 7th ♯11 Chords on Piano
The 7♯11 chord is a dominant 7th with a raised eleventh (augmented fourth) — the signature chord of the Lydian Dominant sound. It creates a bright, sophisticated tension that is central to modern jazz harmony and tritone substitutions.
Formula: Root – Major 3rd – Augmented 4th – Perfect 5th – Minor 7th
Scale degrees: 1–3–♯4–5–♭7
Sound: Bright, sophisticated, Lydian Dominant
Symbol: 7♯11 (C7♯11)
Why ♯11 instead of natural 11? A natural 11th (perfect 4th) clashes badly with the major 3rd — they are only a semitone apart. The ♯11 avoids this clash entirely, sitting comfortably alongside the third. This is why jazz musicians strongly prefer 7♯11 over 7sus or dom11 for dominant chords. The matching scale is Lydian Dominant (4th mode of melodic minor).
7♯11 Chord in All 18 Keys
C Dominant 7th Sharp 11 Chord
C# Dominant 7th Sharp 11 Chord
Db Dominant 7th Sharp 11 Chord
D Dominant 7th Sharp 11 Chord
D# Dominant 7th Sharp 11 Chord
Eb Dominant 7th Sharp 11 Chord
E Dominant 7th Sharp 11 Chord
F Dominant 7th Sharp 11 Chord
F# Dominant 7th Sharp 11 Chord
Gb Dominant 7th Sharp 11 Chord
G Dominant 7th Sharp 11 Chord
G# Dominant 7th Sharp 11 Chord
Ab Dominant 7th Sharp 11 Chord
A Dominant 7th Sharp 11 Chord
A# Dominant 7th Sharp 11 Chord
Bb Dominant 7th Sharp 11 Chord
B Dominant 7th Sharp 11 Chord
Cb Dominant 7th Sharp 11 Chord