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Csus4 chord (C suspended fourth) on piano

Csus4 (C suspended fourth) has three notes: C, F and G. Its formula is 1, 4, 5. In major keys, Csus4 is the Isus4 chord in C major, the IIsus4 in Bb major, the IIIsus4 in Ab major, the Vsus4 in F major and the VIsus4 in Eb major.

Csus4 inversions and fingering

CFG
Root position
C F G · RH 1-3-5 · LH 5-2-1
FGC
First inversion
F G C · RH 1-2-5 · LH 5-3-1
GCF
Second inversion
G C F · RH 1-2-5 · LH 5-2-1

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Csus4 chord facts
SymbolCsus4
Also writtenCsus
NotesC F G
Formula1 4 5
Intervalsroot, perfect fourth, perfect fifth
TypeSuspended fourth chord

Csus4 across the keyboard

C3C4C5C1F4G5C1F4G5C1

Piano, C3 to C5. Notes in this scale, low to high: C3 (1), F3 (4), G3 (5), C4 (1), F4 (4), G4 (5), C5 (1).

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Questions

What notes are in the Csus4 chord?

Csus4 (C suspended fourth) has three notes: C, F and G. Its formula is 1, 4, 5. C is the root, F is the perfect fourth and G is the perfect fifth.

How do you play Csus4 on piano?

Play C, F and G together. Root position: C F G · RH 1-3-5 · LH 5-2-1.

What key is Csus4 in?

In major keys, Csus4 is the Isus4 chord in C major, the IIsus4 in Bb major, the IIIsus4 in Ab major, the Vsus4 in F major and the VIsus4 in Eb major. It is diatonic to those keys, so it fits songs in any of them.

What does sus mean in Csus4?

Suspended: the 3rd is replaced by the 4th, F. With no 3rd, Csus4 is neither major nor minor, and it usually resolves to C or Cm.