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  
e|----2-----4-----6-----0-----2-----4----------|
B|----4-----5-----7-----0-----2-----4-----2----|
G|----4-----6-----8-----1-----3-----4-----3----|
D|----4-----6-----8-----2-----4-----6-----2----|
A|----2-----4-----6-----2-----------6-----1----|
E|----------------------0-----------4----------|
      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)

Key of B Major Using 7th Chords

B Major 7 Chord BMaj7
C Sharp minor 7 Chord C♯m7
D Sharp minor 7 Chord D♯m7
E Major 7 Chord EMaj7
F Sharp Dominant 7 Chord F♯7
G Sharp Minor 7 Chord G♯m7
A Sharp minor 7 ♭5 Chord A♯m7♭5

B Major 7 - C♯ minor 7 - D♯ minor 7 - E Major 7 - F♯ Dominant 7 - G♯ minor 7 - A♯m7♭5

    BMaj7  C♯m7  D♯m7  EMaj7 F♯7   G♯m7 A♯m7♭5  
e|----2-----4-----6-----0-----2-----4----------|
B|----4-----5-----7-----0-----2-----4-----2----|
G|----3-----4-----6-----1-----3-----4-----1----|
D|----4-----6-----8-----1-----2-----4-----2----|
A|----2-----4-----6-----2-----4-----6-----1----|
E|----------------------0-----2-----4----------|
      I     ii    iii   IV    V     vi    vii