Quick Answer & Harmonic Definition

To play the C Augmented chord on piano, press the keys C, E, G# simultaneously. In root position, C is the lowest note. First inversion places E in the bass; second inversion uses G# as the lowest note.

Piano Chord

Caug Piano Chord

A major triad with a raised fifth. Creates a mysterious, unsettled sound. Learn the C Augmented chord on piano with interactive keyboard, inversions, and audio playback.

Notes
C – E – G#
Intervals
0 – 4 – 8
Type
triad chord
C E G#
E
A
D
G
B
e
3
5
7
9
12
3 notes · Standard (E A D G B E)

Playing the Caug Piano Chord

The Caug chord is a augmented chord built on the root C. It contains 3 notes: C, E, G#. On piano, this chord is played by pressing these keys simultaneously or as an arpeggio.

A major triad with a raised fifth. Creates a mysterious, unsettled sound. Mastering the Caug chord opens up countless songs and progressions in the key of C.

Piano Finger Positions for Caug

For the Caug triad chord, use these finger positions:

  • Right hand (root position): Thumb (1) on C, middle finger (3) on E, pinky (5) on G#.
  • Left hand (root position): Pinky (5) on C, middle finger (3) on E, thumb (1) on G#.
  • Arpeggiated: Play the notes sequentially from lowest to highest for a broken triad effect.

Caug Chord Inversions

Inversions change the bass note while keeping the same harmonic quality:

Inversion Bass Note Notes (bottom to top) Sound
Root C C – E – G# Most stable
1st E E – G# – C Lighter, less stable

Interval Structure of Caug

Degree Interval Semitones Note in C
Root Root (R) 0 C
3rd Major 3rd 4 E
5th Augmented 5th 8 G#

Common Progressions with Caug on Piano

  • I–IV–V–I: Caug – Faug – Gaug – Caug (classic cadence)
  • I–V–vi–IV: Caug – G – Am – F (pop progression)
  • ii–V–I: Dm – G – Caug (jazz turnaround)

Other C Piano Chords

C
Major
Cm
Minor
C7
Dominant 7th
Cmaj7
Major 7th
Cm7
Minor 7th
Cdim
Diminished

Augmented Chord in All 12 Keys

Caug C#aug Daug D#aug Eaug Faug F#aug Gaug G#aug Aaug A#aug Baug
Virtual Piano
Interactive keyboard
Caug Guitar
Guitar chord shapes
C Scale
Notes that fit this chord
Songs
Find songs using Caug

Knowledge Base & FAQs

Caug Piano Chord — FAQ

Everything you need to know about our browser-based Web Audio engine, instruments, and music theory workspace.

How do I play the Caug chord on piano?

To play the C Augmented chord on piano, press the keys C, E, G# simultaneously.

In root position, C is the lowest note. First inversion places E in the bass; second inversion uses G# as the lowest note.

What are the notes in the Caug piano chord?

The C Augmented piano chord contains 3 notes: C, E, G#.

These are derived from the augmented interval formula applied to the root note C.

What is the best fingering for Caug on piano?

For the Caug triad in root position, use fingers 1 (thumb), 3, and 5 for a triad, or 1, 2, 3, and 5 for a triad chord.

Inversions may use 1, 2, 4 (first inversion) or 1, 3, 5 (second inversion).

What does the Caug chord sound like?

The Caug chord has a a major triad with a raised fifth.

creates a mysterious, unsettled sound. It provides rich harmonic tension and expressive color within songwriting and jazz arrangements.

What keys does the Caug chord belong to?

Caug appears frequently across modal, jazz, blues, and contemporary progressions as an essential tension or resolution voicing.

What are the inversions of Caug on piano?

Caug has 2 inversions.

Root position: C–E–G#. First inversion: E–G#–C.

What chords go well with Caug on piano?

In the key of C major, Caug pairs naturally with F major (IV chord), G major (V chord), and Am (vi chord).

The I–IV–V–I progression is a classic way to practice these.

Is Caug a good chord for beginners on piano?

Yes, Caug is a triad with 3 notes, making it accessible for beginners.

Practice playing all 3 keys simultaneously with proper finger positioning.

How do I use Caug in a chord progression?

Caug functions as the tonic (I) in C major.

A classic progression is I–IV–V–I: Caug–F–G–Caug. Practice this in both hands separately before combining.

What is the difference between C major and C minor on piano?

The C major chord (C–E–G) uses a major third (4 semitones from root) for a bright sound.

The Cm chord uses a minor third (3 semitones) for a darker, more emotional sound.