Piano chord

C Augmented 7th Piano Chord (C7♯5)

The C Augmented 7th chord on piano is made of the notes C, E, G♯ and B♭. Bold and unresolved. An augmented triad with a dominant 7th.

C Augmented 7th chord on a piano keyboard: C, E, G♯, B♭ C4C5 C E G♯ B♭

C7♯5 C – E – G♯ – B♭

Tap any key to hear it.

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What notes are in C Augmented 7th?

4 notes, built 1 – 3 – ♯5 – ♭7 up from C.

Notes
C – E – G♯ – B♭
Formula
1 – 3 – ♯5 – ♭7
Semitones from the root
0 – 4 – 8 – 10
Symbol
C7♯5
Chord type
Augmented 7th, 4 notes

How to play C Augmented 7th on piano

  • Right hand: C (1), E (2), G♯ (3), B♭ (5). Fingers 1 – 2 – 3 – 5, thumb on C.
  • Left hand: C (5), E (3), G♯ (2), B♭ (1). Fingers 5 – 3 – 2 – 1, little finger on C.

Fingers are numbered 1 (thumb) to 5 (little finger) on both hands.

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C Augmented 7th inversions

Each inversion puts a different note of the chord in the bass. Written as a slash chord: C7♯5/E, C7♯5/G♯, C7♯5/B♭.

C Augmented 7th root position on piano: C, E, G♯, B♭ C E G♯ B♭
Root position C7♯5 C – E – G♯ – B♭ RH 1 – 2 – 3 – 5 · LH 5 – 3 – 2 – 1
C Augmented 7th 1st inversion on piano: E, G♯, B♭, C E G♯ B♭ C
1st inversion C7♯5/E E – G♯ – B♭ – C RH 1 – 2 – 3 – 5 · LH 5 – 3 – 2 – 1
C Augmented 7th 2nd inversion on piano: G♯, B♭, C, E G♯ B♭ C E
2nd inversion C7♯5/G♯ G♯ – B♭ – C – E RH 1 – 2 – 3 – 5 · LH 5 – 3 – 2 – 1
C Augmented 7th 3rd inversion on piano: B♭, C, E, G♯ B♭ C E G♯
3rd inversion C7♯5/B♭ B♭ – C – E – G♯ RH 1 – 2 – 3 – 5 · LH 5 – 3 – 2 – 1

Progressions with C Augmented 7th

Press play: the chords move across the keyboard as they sound, voiced so your hand barely moves.

Altered dominant

in F major

  1. ii7 Gm7
  2. V7♯5 C7♯5
  3. Imaj7 Fmaj7
Altered dominant in F major: Gm7, C7♯5, Fmaj7 B♭ D F G

Blues turnaround

in F major

  1. I7 F7
  2. IV7 B♭7
  3. V7♯5 C7♯5
  4. I7 F7
Blues turnaround in F major: F7, B♭7, C7♯5, F7 C E♭ F A

Can you find C Augmented 7th?

Tap the notes on the keyboard, then check. Six chords, starting with this one.

1 / 6 Tap the notes of C Augmented 7th (C7♯5)

Score 0

Any octave, any order. Each key you tap plays.

Practice keyboard: tap the notes of the chord

C Augmented 7th chord FAQ

What notes are in the C Augmented 7th chord?

C Augmented 7th (C7♯5) has 4 notes: C, E, G♯ and B♭. Its formula is 1 – 3 – ♯5 – ♭7, counted up from C.

How do you play C Augmented 7th on the piano?

Put your right thumb on C and play C, E, G♯ and B♭ with fingers 1 – 2 – 3 – 5. With the left hand, use fingers 5 – 3 – 2 – 1, little finger on C.

What are the inversions of C Augmented 7th?

1st inversion: E, G♯, B♭, C (C7♯5/E). 2nd inversion: G♯, B♭, C, E (C7♯5/G♯). 3rd inversion: B♭, C, E, G♯ (C7♯5/B♭).

Other C chords

Augmented 7th chords on every root

Piano chord chart: all 264 chords Open C7♯5 in the chord finder Free PDF chord chart Play it on the virtual piano