Which notes are in the F#9 chord?

F#9 contains the notes F#, A#, C#, E and G#. Relative to the root these are the degrees 1 – 3 – 5 – ♭7 – 9.

Are F#9 and Gb9 the same chord?

Yes. F#9 and Gb9 are enharmonically identical — the spelling differs but the frets and keys are the same. Which name is used depends on the key of the piece.

F# dominant 9th · Piano

F#9 Chord on Piano

The F#9 chord (F# dominant 9th) is built from the notes F#, A#, C#, E and G#. The keyboard diagram below shows exactly which keys to press. The same chord is also written Gb9; both spellings sound identical.

Chord diagrams

F#9

Notes in this chord

F♯
A♯
C♯
E
G♯

Degrees: 1 – 3 – 5 – ♭7 – 9

Also written: Gb9

How to play

To play F#9 on piano, press F#, A#, C#, E and G# together. In root position the lowest note is F#, and the finger numbers follow the keys left to right in the diagram.

Theory behind the chord

Dominant ninth chords extend the dominant seventh with a ninth on top. They keep the pull of a seventh chord but sound fuller and more coloured, which is why funk and soul rhythm parts lean on them. On F#9 this structure sits on the root F#, so the degrees 1 – 3 – 5 – ♭7 – 9 map onto F#, A#, C#, E and G#.

Frequently asked questions

Which notes are in the F#9 chord?: F#9 contains the notes F#, A#, C#, E and G#. Relative to the root these are the degrees 1 – 3 – 5 – ♭7 – 9.
Are F#9 and Gb9 the same chord?: Yes. F#9 and Gb9 are enharmonically identical — the spelling differs but the frets and keys are the same. Which name is used depends on the key of the piece.

Practise F#9 on your phone

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