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Piano chord
A Major 9th Piano Chord (Amaj9)
The A Major 9th chord on piano is made of the notes A, C♯, E, G♯ and B. Lush and sophisticated. A major 7th with an added 9th.
Tap any key to hear it.
What notes are in A Major 9th?
5 notes, built 1 – 3 – 5 – 7 – 9 up from A.
- Notes
- A – C♯ – E – G♯ – B
- Formula
- 1 – 3 – 5 – 7 – 9
- Semitones from the root
- 0 – 4 – 7 – 11 – 14
- Symbol
- Amaj9
- Chord type
- Major 9th, 5 notes
How to play A Major 9th on piano
A Major 9th spans more than an octave, so it is usually split between the hands.
- Left hand: A and E (fingers 5 and 1).
- Right hand: C♯, G♯, B (fingers 1, 3 and 5).
A Major 9th inversions
Each inversion puts a different note of the chord in the bass. Written as a slash chord: Amaj9/C♯, Amaj9/E, Amaj9/G♯.
Can you find A Major 9th?
Tap the notes on the keyboard, then check. Six chords, starting with this one.
1 / 6 Tap the notes of A Major 9th (Amaj9)
Score 0
Any octave, any order. Each key you tap plays.
What key is A Major 9th in?
The keys whose scale contains every note of Amaj9, with the chord’s Roman numeral in each.
Major keys
- A majorImaj9
- E majorIVmaj9
Minor keys
- F♯ minorIIImaj9
- C♯ minorVImaj9
A Major 9th chord FAQ
What notes are in the A Major 9th chord?
A Major 9th (Amaj9) has 5 notes: A, C♯, E, G♯ and B. Its formula is 1 – 3 – 5 – 7 – 9, counted up from A.
How do you play A Major 9th on the piano?
Spread it over two hands: the left hand plays A and E (fingers 5 and 1), the right hand plays C♯, G♯, B (fingers 1, 3 and 5).
What are the inversions of A Major 9th?
1st inversion: C♯, E, G♯, A, B (Amaj9/C♯). 2nd inversion: E, G♯, A, B, C♯ (Amaj9/E). 3rd inversion: G♯, A, B, C♯, E (Amaj9/G♯).
What key is A Major 9th in?
Amaj9 belongs to A major (Imaj9), E major (IVmaj9), F♯ minor (IIImaj9) and C♯ minor (VImaj9).