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Chord type

Dominant 7th ♯5 Chords on Piano

The dominant 7th ♯5 chord raises the fifth of a dominant 7th by a half step, creating an augmented dominant sound full of upward tension. It is enharmonically identical to the augmented 7th chord and functions as an altered dominant that pulls strongly toward resolution, a staple of jazz turnarounds and sophisticated pop harmony.

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

Formula: Root – Major 3rd – Augmented 5th – Minor 7th

Scale degrees: 1–3–♯5–♭7

Sound: Tense, augmented, pulling upward, jazz

Symbol: 7♯5 (C7♯5)

Augmented 7th by another name: C7♯5 and Caug7 contain exactly the same notes: C–E–G♯–B♭. The difference is context: 7♯5 implies a dominant function (resolving to F), while aug7 can be more ambiguous. In practice, jazz musicians use the names interchangeably.

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All 18 spellings, ♯ and ♭ keys listed separately.

Dominant 7th ♯5 Chord in All 18 Keys

C Dominant 7th ♯5 ChordNotes: C – E – G♯ – B♭

C♯ Dominant 7th ♯5 ChordNotes: C♯ – E♯ – G♯♯ – B

D♭ Dominant 7th ♯5 ChordNotes: D♭ – F – A – C♭

D Dominant 7th ♯5 ChordNotes: D – F♯ – A♯ – C

D♯ Dominant 7th ♯5 ChordNotes: D♯ – F♯♯ – A♯♯ – C♯

E♭ Dominant 7th ♯5 ChordNotes: E♭ – G – B – D♭

E Dominant 7th ♯5 ChordNotes: E – G♯ – B♯ – D

F Dominant 7th ♯5 ChordNotes: F – A – C♯ – E♭

F♯ Dominant 7th ♯5 ChordNotes: F♯ – A♯ – C♯♯ – E

G♭ Dominant 7th ♯5 ChordNotes: G♭ – B♭ – D – F♭

G Dominant 7th ♯5 ChordNotes: G – B – D♯ – F

G♯ Dominant 7th ♯5 ChordNotes: G♯ – B♯ – D♯♯ – F♯

A♭ Dominant 7th ♯5 ChordNotes: A♭ – C – E – G♭

A Dominant 7th ♯5 ChordNotes: A – C♯ – E♯ – G

A♯ Dominant 7th ♯5 ChordNotes: A♯ – C♯♯ – E♯♯ – G♯

B♭ Dominant 7th ♯5 ChordNotes: B♭ – D – F♯ – A♭

B Dominant 7th ♯5 ChordNotes: B – D♯ – F♯♯ – A

C♭ Dominant 7th ♯5 ChordNotes: C♭ – E♭ – G – B♭♭