How do you play the C 5/C# chord?

To play the C 5/C# chord on piano, play the C 5 chord (C and G) with C# as the lowest bass note. Place the C# note below the other chord tones. Slash chords specify a particular bass note different from the chord root.

What notes are in the C 5/C# chord?

The C 5/C# chord uses the 2 notes of the C 5 chord — C (Perfect unison) and G (Perfect fifth) — with C# played as the bass note in the lowest register.

What is a slash chord?

A slash chord (or compound chord) is written as Chord/Bass and specifies both a chord and a bass note. The note to the right of the slash is played as the lowest note. The C 5/C# chord means a C 5 chord with C# in the bass.

C 5/C#

The C 5 chord consists of the C (Perfect unison) and G (Perfect fifth) notes, with C# as the bass note.

Piano keyboard showing the notes for a C 5/C# chord

How to play the C 5/C# chord

Play C# as the lowest bass note in the left hand
Find C (Root) on the piano keyboard
Add G (Perfect fifth) — 7 semitones above C
Press all 3 notes simultaneously to sound the C 5/C# chord

Inversions with same root

C# maj7(b5)(sus)

Related chords with different root

G sus4(b5)