Am9 Minor 9th Chord

Minor 7th chord with an added 9th. Rich texture used in neo-soul and R&B.

Am9 Chord — Quick Answer & Harmonic Definition

The Am9 (Minor 9th) chord consists of the notes A, C, E, G, B. It is constructed from the root note A using the minor 9th interval formula (0–3–7–10–14 semitones).

Formula: 0 – 3 – 7 – 10 – 14
Notes
A – C – E – G – B
Intervals (semitones)
0 – 3 – 7 – 10 – 14
Type
Extended

Am9 on Piano

Press highlighted keys simultaneously to play the Am9 chord.

R
A (Root (R))
2
C (Minor 3rd (♭3))
3
E (Perfect 5th)
4
G (Minor 7th (♭7))
5
B (Major 9th)

Am9 on Guitar

The Am9 chord uses notes A, C, E, G, B. Build a voicing by finding these notes on any strings — root on the 6th string is a common starting point for barre chord shapes.

Interval Analysis

Degree Interval Name Semitones Note in A
Root Root (R) 0 A
3rd Minor 3rd (♭3) 3 C
5th Perfect 5th 7 E
7th Minor 7th (♭7) 10 G
9th Major 9th 14 B

About the A Minor 9th Chord

The Am9 chord (A Minor 9th) consists of 5 notes: A, C, E, G, B. Minor 7th chord with an added 9th. Rich texture used in neo-soul and R&B.

To build any minor 9th chord, apply intervals of 0, 3, 7, 10, 14 semitones above the root. Starting from A: the notes land on A, C, E, G, B.

Playing Am9 on Piano

Press A, C, E, G, B simultaneously. In root position, A is lowest. First inversion places C in the bass for a lighter sound; second inversion uses E as the bass note.

Common Chord Progressions Using Am9

  • I–IV–V: Am9 – Dm9 – Em9 (blues and rock)
  • I–V–vi–IV: Am9 – E – F#m – D (pop staple)
  • I–vi–IV–V: Am9 – F#m – D – E (50s progression)

The Am9 Chord in Context

The Am9 (Minor 9th) chord features a distinctive minor 7th chord with an added 9th. rich texture used in neo-soul and r&b. built from the intervals 0–3–7–10–14. It provides rich harmonic color and tension across pop, jazz, classical, and contemporary compositions.

Other A Chords

A
Major
Am
Minor
A7
Dominant 7th
Amaj7
Major 7th
Am7
Minor 7th
Adim
Diminished

Minor 9th Chord in All 12 Keys

Cm9 C#m9 Dm9 D#m9 Em9 Fm9 F#m9 Gm9 G#m9 Am9 A#m9 Bm9
Virtual Piano
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Virtual Guitar
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A Scale
Notes that fit Am9
Songs
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Knowledge Base & FAQs

Am9 Chord — Frequently Asked Questions

Everything you need to know about our browser-based Web Audio engine, instruments, and music theory workspace.

What notes are in the Am9 chord?

The A Minor 9th chord contains: A, C, E, G, B.

These notes are derived by applying the minor 9th interval formula (0–3–7–10–14 semitones) to the root note A.

What is the Am9 chord used for?

Minor 7th chord with an added 9th.

Rich texture used in neo-soul and R&B. The Am9 chord is used across pop, rock, jazz, and classical music. As the I chord in the key of A major, it functions as the most stable resting point in progressions.

How do you play Am9 on piano?

On piano, play A, C, E, G, B simultaneously.

In root position, A is the lowest note. Inversions move the bass note up — first inversion has C lowest, second inversion has E lowest.

How many notes are in a minor 9th chord?

A minor 9th chord has 5 notes: A, C, E, G, B (in A).

It is an extended chord with 5 or more notes.

What is the difference between A major and A minor?

The A major chord (A–C#–E) uses a major third (4 semitones), giving it a bright, happy sound.

The A minor chord (A–C–E) uses a minor third (3 semitones), giving it a darker, emotional sound.

What key does Am9 belong to?

Am9 naturally serves as the I chord in the key of A major.

It also appears as IV in the key of E major, and as V in the key of D major.

Can I play Am9 on ukulele?

Yes.

The ukulele uses GCEA tuning with 4 strings. The Am9 chord notes (A, C, E, G, B) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.

What chords go well with Am9?

In the key of A major, Am9 pairs naturally with D major (IV), E major (V), and F#m (vi).

The classic I–IV–V (Am9–D–E) is the foundation of blues, country, and rock.

What is a chord inversion of Am9?

An inversion places a non-root note in the bass.

Am9 root position: A in bass. First inversion: C in bass. Second inversion: E in bass. Inversions create smoother bass line movement without changing the harmony.

How do I memorize the notes in a minor 9th chord?

Remember the formula: 0–3–7–10–14 semitones from root.

For Am9: start on A, add 3 semitones, then 7 semitones, then 10 semitones, then 14 semitones. Practicing this across all 12 roots builds instant recognition of any minor 9th chord.