Just click on "What Key Today?" A number between 1 and 30 will result. Find that number on the chart and write your song in that key. Job Aids: Chord Chart Circle of Fifths Num Major Key I ii iii IV V vi viiº 1 C major C Dm Em F G Am Bdim 2 G major G Am Bm C D Em F#dim 3 D major D Em F#m G A Bm C#dim 4 A major A Bm C#m D E F#m G#dim 5 E major E F#m G#m A B C#m D#dim 6 B major B C#m D#m E F# G#m A#dim 7 F# major F# G#m A#m B C# D#m E#dim 8 C# major C# D#m E#m F# G# A#m B#dim 9 F major F Gm Am Bb C Dm Edim 10 Bb major Bb Cm Dm Eb F Gm Adim 11 Eb major Eb Fm Gm Ab Bb Cm Ddim 12 Ab major Ab Bbm Cm Db Eb Fm Gdim 13 Db major Db Ebm Fm Gb Ab Bbm Cdim 14 Gb major Gb Abm Bbm Cb Db Ebm Fdim 15 Cb major Cb Dbm Ebm Fb Gb Abm Bbdim Minor Key i iiº III+ iv V VI viiº 16 A minor Am Bdim Caug Dm E F G#dim 17 E minor Em F#dim Gaug Am B C D#dim 18 B minor Bm C#dim Daug Em F# G A#dim 19 F# minor F#m G#dim Aaug Bm C# D E#dim 20 C# minor C#m D#dim Eaug F#m G# A B#dim 21 G# minor G#m A#dim Baug C#m D# E Fxdim 22 D# minor D#m E#dim F#aug G#m A# B Cxdim 23 A# minor A#m B#dim C#aug D#m E# F# Gxdim 24 D minor Dm Edim Faug Gm A Bb C#dim 25 G minor Gm Adim Bbaug Cm D Eb F#dim 26 C minor Cm Ddim Ebaug Fm G Ab Bdim 27 F minor Fm Gdim Abaug Bbm C Db Edim 28 Bb minor Bbm Cdim Dbaug Ebm F Gb Adim 29 Eb minor Ebm Fdim Gbaug Abm Bb Cb Ddim 30 Ab minor Abm Bbdim Cbaug Dbm Eb Fb Gdim