Quick Answer & Harmonic Definition

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

Piano Chord

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

Playing the C#aug Piano Chord

The C#aug chord is a augmented chord built on the root C#. It contains 3 notes: C#, F, A. 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 C#aug chord opens up countless songs and progressions in the key of C#.

Piano Finger Positions for C#aug

For the C#aug triad chord, use these finger positions:

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

C#aug Chord Inversions

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

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

Interval Structure of C#aug

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

Common Progressions with C#aug on Piano

  • I–IV–V–I: C#aug – F#aug – G#aug – C#aug (classic cadence)
  • I–V–vi–IV: C#aug – G# – A#m – F# (pop progression)
  • ii–V–I: D#m – G# – C#aug (jazz turnaround)

Other C# Piano Chords

C#
Major
C#m
Minor
C#7
Dominant 7th
C#maj7
Major 7th
C#m7
Minor 7th
C#dim
Diminished

Übermäßig 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
C#aug Guitar
Guitar chord shapes
C# Scale
Notes that fit this chord
Songs
Find songs using C#aug

Knowledge Base & FAQs

C#aug 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 C#aug chord on piano?

To play the C# Augmented chord on piano, press the keys C#, F, A simultaneously.

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

What are the notes in the C#aug piano chord?

The C# Augmented piano chord contains 3 notes: C#, F, A.

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

What is the best fingering for C#aug on piano?

For the C#aug 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 C#aug chord sound like?

The C#aug 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 C#aug chord belong to?

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

What are the inversions of C#aug on piano?

C#aug has 2 inversions.

Root position: C#–F–A. First inversion: F–A–C#.

What chords go well with C#aug on piano?

In the key of C# major, C#aug pairs naturally with F# major (IV chord), G# major (V chord), and A#m (vi chord).

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

Is C#aug a good chord for beginners on piano?

Yes, C#aug 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 C#aug in a chord progression?

C#aug functions as the tonic (I) in C# major.

A classic progression is I–IV–V–I: C#aug–F#–G#–C#aug. 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#–F–G#) uses a major third (4 semitones from root) for a bright sound.

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