FCB♭

Fsus4 (Suspended fourth)F · B♭ · C

Piano samples: Salamander Grand Piano (CC-BY 3.0)

F suspended fourth — notes and structure

The Fsus4 chord replaces the third with the fourth for an open, unresolved sound that usually pulls back to the plain major chord.

The Fsus4 suspended fourth consists of the notes F, B♭, C. Its interval structure is R–4–5 — the root, then each chord tone stacked above it. This is the same chord you see in the interactive finder above, drawn on the piano keyboard with the root circled and every chord tone labelled.

Fsus4 stacks a perfect fourth (B♭) and a perfect fifth (C) above the root F.

To play Fsus4, press the keys F, B♭, C together — the root F is circled on the interactive keyboard above.

What key is Fsus4 in?

Every note of Fsus4 belongs to the scales below, so the chord sounds at home in each of these keys — the roman numeral is the degree it sits on.

  • F major — the I chord
  • B♭ major — the V chord
  • E♭ major — the II chord
  • A♭ major — the VI chord

Chords that go with Fsus4

In F major, the chords built on the first, fourth and fifth degrees carry most songs — put Fsus4 next to these:

Frequently asked questions

What notes are in the F suspended fourth chord on piano?
The Fsus4 chord is made of the notes F, B♭, C. It replaces the third with the fourth for an open, unresolved sound that usually pulls back to the plain major chord.
How do you play F suspended fourth on the piano?
Press F, B♭, C at the same time, with the root F as the lowest note. The interactive keyboard above lights up the exact keys.
What is the suspended fourth chord formula?
Its interval structure is R–4–5 above the root — the same shape transposed to any of the twelve keys.
What key does Fsus4 belong to?
Fsus4 fits F major (where it is the I chord), B♭ major (where it is the V chord), E♭ major (where it is the II chord) — every note of the chord is in those scales.