A major
Notes A – C♯ – E
Formula 1 3 5
A Chords
Root
A
A major
- Notes
- A – C♯ – E
- Formula
- 135
× 0 2 2 2 05 7 7 6 5 5× 12 14 14 14 12Chord finder
Tap keys to build a chord; the name appears here.
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Practice aid. Pitch follows A4 = 440 Hz (ISO 16:1975) in equal temperament; clicks are timed on the audio clock, and your device adds a fixed output delay. Checked 2026-10-23. ISO 16:1975 · Disclaimer
All 20 chord types built on A. The notes of the A major scale are A B C♯ D E F♯ G♯; each chord takes some of them and changes one or two.
Chords in the key of A major
The seven chords built from the major scale, the ones most songs in this key use.
IAiiBmiiiC#mIVDVEviF#mvii°G#dim
Piano Chords: A
Am minor
Notes A – C – E
Formula 1 ♭3 5
A7 dominant 7th
Notes A – C♯ – E – G
Formula 1 3 5 ♭7
Amaj7 major 7th
Notes A – C♯ – E – G♯
Formula 1 3 5 7
Am7 minor 7th
Notes A – C – E – G
Formula 1 ♭3 5 ♭7
Asus2 suspended 2nd
Notes A – B – E
Formula 1 2 5
Asus4 suspended 4th
Notes A – D – E
Formula 1 4 5
Adim diminished
Notes A – C – E♭
Formula 1 ♭3 ♭5
Aaug augmented
Notes A – C♯ – E♯
Formula 1 3 ♯5
A6 major 6th
Notes A – C♯ – E – F♯
Formula 1 3 5 6
Am6 minor 6th
Notes A – C – E – F♯
Formula 1 ♭3 5 6
Aadd9 add 9
Notes A – C♯ – E – B
Formula 1 3 5 9
A9 dominant 9th
Notes A – C♯ – E – G – B
Formula 1 3 5 ♭7 9
Am9 minor 9th
Notes A – C – E – G – B
Formula 1 ♭3 5 ♭7 9
Amaj9 major 9th
Notes A – C♯ – E – G♯ – B
Formula 1 3 5 7 9
Am7b5 half-diminished
Notes A – C – E♭ – G
Formula 1 ♭3 ♭5 ♭7
Adim7 diminished 7th
Notes A – C – E♭ – G♭
Formula 1 ♭3 ♭5 𝄫7
A7sus4 7th suspended 4th
Notes A – D – E – G
Formula 1 4 5 ♭7
Am(maj7) minor-major 7th
Notes A – C – E – G♯
Formula 1 ♭3 5 7
A5 power chord
Notes A – E
Formula 1 5