Two sharps. Bright and ringing on guitar, which is why so many worship and folk songs live here. Bm is the one barre chord standing between you and the whole key.
| Chord | Number | Roman |
|---|---|---|
| D | 1 | I |
| Em | 2m | ii |
| F♯m | 3m | iii |
| G | 4 | IV |
| A | 5 | V |
| Bm | 6m | vi |
| C♯dim | 7° | vii° |
The 1, 4 and 5 (D, G, A) are the backbone. Add the 6m (Bm) and you can play most of what's on the radio. The 7° (C♯dim) mostly shows up as a passing chord, so don't lose sleep over it.
Those numbers are the Nashville number system. Learn the progression as numbers once and it works in every key.
No capo, D shapes; capo 2, play C shapes; capo 5, play A shapes; capo 7, play G shapes.
The capo chart has every key, and the transpose chart moves a song somewhere else entirely.
Songs that leave D usually go to its 4 or 5: key of G or key of A. Or see every key.
Chartless listens to whatever is playing and shows the key, the chords and the numbers live, so you can check a recording against this page while it plays. How to find the key by ear if you'd rather do it yourself.