Most movable barre chords on the guitar are either E-based, meaning they get their names from the notes you play on the 6th (low E) string, or A-based, meaning they get their names from the notes you play on the 5th (A) string. To find the correct fret for any E-based barre chord (whether major, minor, or seventh), refer to the following fretboard for the correct frets for notes on the E string. For example, if you want a G chord, play at the 3rd fret; if you want a C chord, play at the 8th fret, and so on.
To find the correct fret for any A-based barre chord (whether major, minor, or seventh), refer to the following fretboard for notes on the A string. For example, if you want a D chord, play at the 5th fret; if you want a G chord, play at the 10th fret; and so on.
You can even play barre chords above the 12th fret. Starting at the 13th fret, the letter names start over. That is, for E-based chords, the 13th fret = F, 14th fret = F sharp/G flat, 15th fret = G, and so on.
