Augmented 7th Chords on Piano
The augmented 7th chord combines an augmented triad with a minor seventh — creating a tense, colourful dominant chord with a raised fifth that pushes toward resolution. It is a staple of jazz altered dominants and whole-tone harmony.
Formula: Root – Major 3rd – Augmented 5th – Minor 7th
Intervals: 4 + 4 + 2 semitones
Scale degrees: 1–3–♯5–♭7
Sound: Tense, colourful, exotic, forward-moving
Symbol: 7♯5, aug7, +7 (C7♯5, Caug7)
Augmented 7th vs Dominant 7th: The only difference is the fifth — aug7 raises it by a semitone. This small change adds exotic tension that naturally resolves upward to the root of the target chord. The whole-tone scale is the matching scale for augmented 7th chords.
Augmented 7th Chord in All 18 Keys
C Augmented 7th Chord
C# Augmented 7th Chord
Db Augmented 7th Chord
D Augmented 7th Chord
D# Augmented 7th Chord
Eb Augmented 7th Chord
E Augmented 7th Chord
F Augmented 7th Chord
F# Augmented 7th Chord
Gb Augmented 7th Chord
G Augmented 7th Chord
G# Augmented 7th Chord
Ab Augmented 7th Chord
A Augmented 7th Chord
A# Augmented 7th Chord
Bb Augmented 7th Chord
B Augmented 7th Chord
Cb Augmented 7th Chord