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Aadd9 chord

Aadd9 (A add nine) is A, C♯, E and B. It sounds bright, like a major chord with a shimmer on top.

Aadd9

A add nine · A C♯ E B · 1 3 5 9

AEBC♯

Or pick another chord to see and hear it

Root
Chord

Tap keys on the piano to find which chord they make. The editor opens without an account.

Notes in the Aadd9 chord

From A, count 4 half steps up to C♯, 3 more to E and 7 more to B. Its formula is 1 3 5 9: each number is the note’s place in the A major scale, with ♭ a half step lower and ♯ a half step higher. On the piano it is three white keys and one black key (C♯).

The notes of Aadd9 and their intervals from A
NoteFormulaIntervalHalf steps up
A1Root0
C♯3Major third4
E5Perfect fifth7
B9Major ninth14

Aadd9 chord inversions

An inversion is the same chord with another of its notes at the bottom. It keeps the chord’s sound but moves your hand less between chords, which is why pianists use them all the time. The notes are listed lowest first.

Root position

A C♯ E B

Written Aadd9, with the root at the bottom.

1st inversion

C♯ E B A

Written Aadd9/C♯: C♯ at the bottom.

2nd inversion

E B A C♯

Written Aadd9/E: E at the bottom.

3rd inversion

B A C♯ E

Written Aadd9/B: B at the bottom.

Keys with the Aadd9 chord

Aadd9 is built from the notes of these keys, so it fits songs in them. The Roman numeral says which note of the key it starts on. Each key’s page has its scale and all its chords.

Major keys
Minor keys

Chords that often come after Aadd9

EE G♯ BAadd9 to E is I to V, a bright pop move.Dadd9D F♯ A EAadd9 to Dadd9 is I to IV, both with the ninth on top.F♯m7F♯ A C♯ EAadd9 to F♯m7 is I to vi7, soft and open.

More piano chords

Other chords on A

AAmA7Amaj7Am7Asus2Asus4A9A6AdimAm7♭5Adim7Aaug

Add nine chords on other notes

Cadd9D♭add9Dadd9E♭add9Eadd9Fadd9F♯add9Gadd9A♭add9B♭add9Badd9

Or see every chord at once on the piano chords chart.

Frequently asked questions

What notes are in the Aadd9 chord?

Aadd9 is A, C♯, E and B. On the piano that is three white keys and one black key (C♯).

How do you play Aadd9 on the piano?

With your right hand, play A, C♯, E and B with fingers 1, 2, 3 and 5 (thumb to little finger). With your left hand it is 5, 3, 2 and 1. From A, count 4 half steps up to C♯, 3 more to E and 7 more to B.

What are the inversions of Aadd9?

Root position: A C♯ E B. 1st inversion: C♯ E B A (Aadd9/C♯). 2nd inversion: E B A C♯ (Aadd9/E). 3rd inversion: B A C♯ E (Aadd9/B). The notes are the same; only the lowest one changes.

What key is Aadd9 in?

In major keys, Aadd9 is the Iadd9 chord in A major, the Vadd9 chord in D major and the IVadd9 chord in E major. In minor keys, it is the VIadd9 chord in C♯ minor, the IIIadd9 chord in F♯ minor and the VIIadd9 chord in B minor.

Can I make a beat with Aadd9?

Yes. “Make a beat in A major” opens the free editor with a lo-fi beat in A major on A E F♯m D, the key where Aadd9 is the Iadd9 chord. Then change any part, add a melody and your voice, part by part. No account is needed to start.

Make a beat in A major

Opens the free editor with a lo-fi beat in A major on A E F♯m D, the key where Aadd9 is the Iadd9 chord. Then change any part, add a melody and your voice, part by part. No account needed to start.

Make a beat in A majorAll piano chords

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