Extended
A 13th chord
The largest common dominant extension, stacking the thirteenth on top for a full, brassy jazz sound.
Notes in A 13th
| Note | Interval | Semitones from root |
|---|---|---|
| A | Root | 0 |
| C# | Major 3rd | 4 |
| E | Perfect 5th | 7 |
| G | Minor 7th | 10 |
| B | Major 9th | 14 |
| F# | Major 13th | 21 |
Formula: 0–4–7–10–14–21 semitones above the root. Move the whole shape up or down and you get the same chord in another key — that is why 13th chords sound alike no matter where they start.
Other chords on A
Want to hear A 13th inside a progression? Load a key in the chord progression generator or browse the scales reference.
Practise this chord by ear
ChordCraft Lab turns this reference into practice: daily chord puzzles, adaptive quizzes and ear training on a playable keyboard. 14-day free trial, then $7/month.
Start free trial