C♯ 7sus4 (C♯7sus4) chord on piano

Looking for the C♯7sus4 chord on piano? It is a 7sus4 chord (a sus4 chord plus a minor seventh), made of four notes: C♯ – F♯ – G♯ – B. The same chord with a different spelling: D♭ 7sus4 (D♭7sus4).

Root position: C♯4 – F♯4 – G♯4 – B4

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What the C♯7sus4 chord sounds like

A 7sus4 is a suspended dominant seventh: a fourth replaces the third. It is less tense than a plain 7 chord and popular in funk, jazz and modern pop.

Notes of the C♯7sus4 chord

Degree	Note	Interval from the root
1	C♯	root
4	F♯	perfect fourth (5 semitones)
5	G♯	perfect fifth (7 semitones)
7	B	minor seventh (10 semitones)

Root position and inversions

An inversion uses the same notes, with a different note at the bottom. When you change chords, choosing the nearest inversion keeps your hand almost still.

Root position

C♯4 – F♯4 – G♯4 – B4

1st inversion

F♯4 – G♯4 – B4 – C♯5

2nd inversion

G♯4 – B4 – C♯5 – F♯5

3rd inversion

B4 – C♯5 – F♯5 – G♯5

Which keys is it in?

The C♯7sus4 chord is built from the notes of these keys (for minor keys, both the natural and the harmonic minor are considered):

C♯ minor: I7sus4 (tonic)
F♯ major: V7sus4 (dominant)
F♯ minor: V7sus4 (dominant)
G♯ minor: IV7sus4 (subdominant)
A major: III7sus4
E major: VI7sus4
B major: II7sus4
D♯ minor: VII7sus4

Similar chords and substitutes

If C♯7sus4 is too hard, or you want a different colour in the same spot, these chords are worth a try.

Substitutes (by function)

G7 – tritone substitute: the same third and seventh, swapped – a jazz favourite
Fdim7 – diminished seventh on the third: a common stand-in for the dominant
C♯7 – a simpler dominant
F♯ – where it resolves (V → I)

Simpler versions

C♯sus4 – all 3 of its notes are in this chord

Richer versions

C♯11 – the same chord plus 2 colour notes

Frequently asked questions

What notes are in the C♯7sus4 chord?

C♯, F♯, G♯, B. The root is C♯; the intervals of the other notes from the root: perfect fourth, perfect fifth, minor seventh.

How do I play the C♯7sus4 chord on piano?

In root position, the right hand usually plays with fingers 1, 3 and 5 (thumb, middle finger, little finger); four-note chords with fingers 1, 2, 3 and 5. The left hand mirrors this: 5, 3, 1. In an inversion the top or bottom note moves to the other side, so your hand moves less when you change chords.

How is the C♯7sus4 chord written?

The chord symbol is C♯7sus4 (also written C#7sus4), and its full name is C♯ 7sus4.