A13
Extended · A root
A13
The fullest dominant extension. Contains almost every scale degree.
0 st4 st7 st10 st14 st17 st21 st
Notes in A13
ARoot
C#3rd
E5th
G7th
B9th
D11th
F#13th
A is the reference pitch (A440). Very common in rock and pop — the vi chord in C major.
Identify the Chord Quality on A
Each chord below is played on A. Listen and identify whether you heard A13, Am, A7, or another quality — the hardest and most useful ear training skill.
13th in All 12 Keys
Other Chords in A
Related Extended
About the A13 Chord
The A13 chord is a 13th chord built on A. It contains the notes A, C#, E, G, B, D, F# — the root, third, fifth, seventh, and extensions.
The fullest dominant extension. Contains almost every scale degree. Practising the A13 chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.