Guitar Chords in the Key of G Major

The chords in the key of G Major

G Major Chord G
A minor Chord Am
B minor Chord Bm
C Major Chord C
D Major Chord D
E Minor Chord Em
F Sharp Diminished Chord F♯dim

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

      G     Am    Bm    C     D     Em  F#dim   
e|----3-----0-----2-----0-----2-----0----------|
B|----0-----1-----3-----1-----3-----0----------|
G|----0-----2-----4-----0-----2-----0-----2----|
D|----0-----2-----4-----2-----0-----2-----4----|
A|----2-----0-----2-----3-----------2-----3----|
E|----3-----------------------------0-----2----|
      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 G Major Using 7th Chords

G Major 7 Chord GMaj7
A minor 7 Chord Am7
B minor 7 Chord Bm7
C Major Chord CMaj7
D Dominant 7 Chord D7
E Minor 7 Chord Em7
F Sharp minr 7 ♭5 Chord F♯m7♭5

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

    GMaj7  Am7   Bm7  CMaj7   D7   Em7  F♯m7♭5  
e|----2-----3-----2-----0-----2-----0----------|
B|----0-----1-----0-----0-----1-----3-----1----|
G|----0-----2-----2-----0-----2-----0-----2----|
D|----0-----2-----0-----2-----0-----2-----2----|
A|----2-----0-----2-----3-----------2-----x----|
E|----3-----------------------------0-----2----|
      I     ii   iii    IV    V     vi   vii