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Chord type

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.

Each key below opens the full reference entry — keyboard diagram, audio, inversions, fingerings, and notation.

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.

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All 18 spellings, ♯ and ♭ keys listed separately.

Augmented 7th Chord in All 18 Keys

C Augmented 7th ChordNotes: C – E – G♯ – B♭

C♯ Augmented 7th ChordNotes: C♯ – E♯ – G♯♯ – B

D♭ Augmented 7th ChordNotes: D♭ – F – A – C♭

D Augmented 7th ChordNotes: D – F♯ – A♯ – C

D♯ Augmented 7th ChordNotes: D♯ – F♯♯ – A♯♯ – C♯

E♭ Augmented 7th ChordNotes: E♭ – G – B – D♭

E Augmented 7th ChordNotes: E – G♯ – B♯ – D

F Augmented 7th ChordNotes: F – A – C♯ – E♭

F♯ Augmented 7th ChordNotes: F♯ – A♯ – C♯♯ – E

G♭ Augmented 7th ChordNotes: G♭ – B♭ – D – F♭

G Augmented 7th ChordNotes: G – B – D♯ – F

G♯ Augmented 7th ChordNotes: G♯ – B♯ – D♯♯ – F♯

A♭ Augmented 7th ChordNotes: A♭ – C – E – G♭

A Augmented 7th ChordNotes: A – C♯ – E♯ – G

A♯ Augmented 7th ChordNotes: A♯ – C♯♯ – E♯♯ – G♯

B♭ Augmented 7th ChordNotes: B♭ – D – F♯ – A♭

B Augmented 7th ChordNotes: B – D♯ – F♯♯ – A

C♭ Augmented 7th ChordNotes: C♭ – E♭ – G – B♭♭