C sharp half-diminished piano chord - C#m7b5

The C sharp half-diminished 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#m7b5.

Interactive piano diagram for the C sharp half-diminished chord

Piano keyboard displaying the C sharp half-diminished chord with the notes Fb E G Cb B C# Db

Reduced chords

Chords that are a subset of C#m7b5. These contain less notes but all of them are included in C#m7b5.

C sharp half-diminished 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#m7b5 chord. Feel free to save or share the image as needed.

Piano chord chart for the C sharp half-diminished chord (C#m7b5). The notes C#, E, G and B are highlighted.