Skip to content

C♯ Augmented Chord: Guitar, Piano and Notes

The C♯ Augmented chord is built on the root note C♯. Its notes are C♯, E♯ and G𝄪. It's enharmonically the same chord as D♭ Augmented.

Transpose
Quality
Short answer

Augmented chords feel floaty and uncertain. Raising the fifth of a major triad creates a symmetrical chord with no clear home, which suits transitions and dreamy film score moments.

Notes
C♯ · E♯ · G𝄪
Formula
1 · 3 · ♯5
Semitones
0 · 4 · 8
Note
C♯
Quality
Augmented
Symbol
C♯+

C♯ Augmented on piano

3 notes
View:
Piano diagram of the C♯ Augmented chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play C♯ Augmented on piano, place your right hand with your thumb on C♯, middle finger on E♯ and little finger on G𝄪. Press the keys together and listen for an even sound. On the keyboard C♯ is a black key and E♯ and G𝄪 are white, the keys you'd normally call F and A. The thumb starts on a black key, so slide the whole hand a little further in, towards the fallboard. Practice moving in and out of the chord slowly, then bring in a metronome.

  • C♯1
  • E♯3
  • G𝄪♯5

C♯ Augmented on guitar

View:
Guitar chord diagram of the C♯ Augmented chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, C♯ Augmented is commonly played with the voicing shown above. This one is a barre at fret 9: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them.

C♯ · E♯ · G𝄪

Play C♯ Augmented on the online piano

Free, in your browser: play with the mouse, your computer keyboard or a USB MIDI keyboard. No sign-up.

Open the piano

C♯ Augmented chord notes

Also known as D♭ Augmented

DegreeIntervalSemitonesNoteHear
1Root0C♯(C#)
3Major third4E♯(E#)
♯5Augmented fifth8G𝄪(G##)

How to use the C♯ Augmented chord

The C♯ Augmented chord is built from a root, a major third and an augmented fifth. Start at the root C♯ and stack the intervals to get the whole chord: C♯, E♯ and G𝄪. The same formula gives you the chord in any other key.

Augmented chords show up in jazz, bossa nova, film scores and psychedelic rock. They're often used as a brief transition chord, for example between I and vi in a major key.

How C♯ Augmented differs from similar chords

C♯+ raises the fifth of C♯ by a half step, so it stacks two major thirds and has no perfect fifth at all. That makes it the mirror image of C♯°, which stacks two minor thirds. Because three major thirds split the octave evenly, the same three notes form an augmented chord on each of them.

Where C♯ Augmented is used

An augmented chord is unstable by construction: it turns up as a passing tonic inside a descending line, and as a dominant sharpened to pull harder.

In a descending line clichéC♯ major
  1. IC♯
  2. I+C♯+
  3. viA♯m
  4. IVF♯

The descending line cliché: the fifth of the tonic rises a semitone, then falls into the third of the vi.

As an altered dominantF♯ major
  1. V+C♯+
  2. IF♯

Raising the fifth of the dominant sharpens its pull into F♯.

Scales that contain C♯+

These scales include C♯+ as one of their diatonic chords. Use them to find melodies and improvisation ideas that fit perfectly.

Questions people ask

What notes are in the C♯ Augmented chord?
The C♯ Augmented chord contains C♯, E♯ and G𝄪 (C#, E# and G## in plain text).
Is the C♯ Augmented chord major or minor?
C♯ Augmented is a augmented chord. Augmented chords feel floaty and uncertain. Raising the fifth of a major triad creates a symmetrical chord with no clear home, which suits transitions and dreamy film score moments.
How do you play C♯ Augmented on piano?
Place your fingers on C♯, E♯ and G𝄪 and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right. On the keyboard C♯ is a black key and E♯ and G𝄪 are white, the keys you'd normally call F and A. The thumb starts on a black key, so slide the whole hand a little further in, towards the fallboard.
How do you play C♯ Augmented on guitar?
Use the fingering in the diagram above. This one is a barre at fret 9: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them.
What is another name for the C♯ Augmented chord?
C♯ Augmented is enharmonically equivalent to D♭ Augmented. Both chord names describe exactly the same notes, but the spelling depends on the key you are playing in.