Guitar Chords in the Key of B Major

The chords in the key of B Major

B Major Chord B
C Sharp minor Chord C♯m
D Sharp minor Chord D♯m
E Major Chord E
F Sharp Major Chord F♯
G Sharp Minor Chord G♯m
A Sharp Diminished Chord A♯dim

B Major - C♯ minor - D♯ minor - E Major - F♯ Major - G♯ minor - A♯ diminished (A♯°).

      B     C#m   D#m   E     F#    G#m   A#dim 
      I     ii    iii   IV    V     vi    vii   

The chord formula for any Major key is
Major - minor - minor - Major - Major - minor - diminished

A common way to number these chords is by Roman numerals
I - ii - iii - IV - V - vi - vii

(Major chords are usually capitalized, minor and diminished chords are lower case)