RepertoWhat does a capo actually do?
A capo clamps across the fingerboard to act as a movable nut, raising every open string by one half step per fret. That lets you keep familiar open-chord shapes (Am, Em, C, G, D) while shifting a song into a higher key for the singer.
Beyond key changes, a capo changes voicing character: playing an F#m - D - A - E progression with a capo on fret 2 using Em - C - G - D shapes gives shimmering open strings and saves your fretting hand during a three-hour set.
How to place a capo cleanly without buzz
Almost all capo buzz and tuning drift comes from placement or spring pressure. Three habits solve both:
- Place it right behind the fret wire: On fret 2, clamp 2–3 mm behind the second metal fret wire (toward the headstock), never directly on top of the wire or far back in the middle of the fret.
- Keep the bar parallel to the fret: An angled capo leaves high strings buzzing while pulling low strings sideways and sharp.
- Use minimum firm tension: Adjustable screw or tension capos should be tightened just enough for every string to ring clearly — excess clamp force bends strings sharp behind the fret.
Capo key conversion chart (Frets 1 to 7)
Find your capo fret in the left column and the open chord shape your hand plays across the top. The cell shows the actual concert chord the audience — and your keyboardist or bassist — hears:
| Capo Fret | C Shape | D Shape | Em Shape | G Shape | Am Shape |
|---|---|---|---|---|---|
| Open (0) | C | D | Em | G | Am |
| Fret 1 (+1) | C# / Db | D# / Eb | Fm | G# / Ab | A#m / Bbm |
| Fret 2 (+2) | D | E | F#m | A | Bm |
| Fret 3 (+3) | D# / Eb | F | Gm | A# / Bb | Cm |
| Fret 4 (+4) | E | F# | G#m | B | C#m |
| Fret 5 (+5) | F | G | Am | C | Dm |
| Fret 6 (+6) | F# / Gb | G# / Ab | A#m / Bbm | C# / Db | D#m / Ebm |
| Fret 7 (+7) | G | A | Bm | D | Em |
Talking keys with your bandmates
If the acoustic guitarist plays Am shapes with a capo on fret 3, the concert key is Cm. Calling out "Am" to a bassist or keyboardist leads to an instant trainwreck on beat one. Agree on calling the concert key across the band while keeping your own transposed shapes on your chart.
Frequently asked questions
Can I use an acoustic guitar capo on a classical nylon-string guitar?
Classical fingerboards are completely flat, whereas steel-string acoustic and electric fretboards are slightly curved (radiused). Use a flat classical capo on nylon-string guitars so the outer and middle strings receive even pressure.
Which capo fret lets me play a song in Bm with easy open chords?
Clamp on fret 2 and play an Am shape — it sounds as Bm. Even easier, clamp on fret 7 and play an Em shape for a bright high-voicing Bm.