C sharp augmented seventh piano chord - C#maj7#5

The C sharp augmented seventh chord is a 4-note chord consisting of the notes C#, E#, G## and B#.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as C#maj7#5.

Interactive piano diagram for the C sharp augmented seventh chord

Piano keyboard displaying the C sharp augmented seventh chord with the notes E# F A C# Db B# C

Reduced chords

Chords that are a subset of C#maj7#5. These contain less notes but all of them are included in C#maj7#5.

C sharp augmented seventh piano chord chart image

In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the C#maj7#5 chord. Feel free to save or share the image as needed.

Piano chord chart for the C sharp augmented seventh chord (C#maj7#5). The notes C#, E#, G## and B# are highlighted.