Same notes and chords as C major, just with Am as home. Here's the twist minor keys pull: the 5 chord is minor on paper (Em), but most songs swap in a major E because it pulls home harder. If a minor-key song suddenly sounds dramatic right before the chorus, that's usually the culprit.
| Chord | Number | Roman |
|---|---|---|
| Am | 1m | i |
| Bdim | 2° | ii° |
| C | ♭3 | III |
| Dm | 4m | iv |
| Em | 5m | v |
| F | ♭6 | VI |
| G | ♭7 | VII |
The workhorses are the 1m, 4m, ♭6 and ♭7 (Am, Dm, F, G), plus that borrowed major 5 (E).
Those numbers are the Nashville number system, written from the minor home chord.
No capo, Am shapes; capo 5, play Em shapes; capo 7, play Dm shapes.
The capo chart and transpose chart cover the rest. Or see every key.
Chartless listens to whatever is playing and shows the key, the chords and the numbers live, minor keys included. How to tell by ear if you'd rather work it out yourself.