C#maj13 Guitar Chord Diagrams | C# Major Thirteen
C#maj13 is the C# major thirteenth chord: root C#, major third E#, fifth G#, major seventh B#, ninth D#, eleventh F# and thirteenth A#. The thirteenth, A#, is the sixth degree of the scale placed an octave higher, stacked above the ninth and eleventh.
Spelled in thirds, the chord uses every note of the C# major scale, so the two share the same seven pitches. C#maj13 is the full stack of thirds, from the root up to the thirteenth, and it spells all seven notes of the major scale. Its spelling includes E# and B#, so the same chord is also written as Dbmaj13. Its extended cousins are covered in ninth chords.
C# major 13th guitar chord is also written as C#maj13, C#M13, C#Δ13 or C#ma13.
Notes of the C# maj13 chord:
Formula of the Major Thirteen chord:
Formula: 1 3 5 7 9 11 13
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Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes make up C# major thirteenth?
C#, E#, G#, B#, D#, F# and A#. Each of the seven letter names appears once, so the chord holds the same notes as the C# major scale.
How does C#maj13 differ from C#maj9?
C#maj9 stops at the ninth with C#, E#, G#, B# and D#. C#maj13 adds the eleventh F# and the thirteenth A# as well.
Is Dbmaj13 just another way to write C#maj13?
Yes, Dbmaj13 is spelled Db, F, Ab, C, Eb, Gb and Bb, the same pitches in flat notation. Both names are correct, and the C# spelling keeps to sharps.
Which scale fits C#maj13, and what does it leave out?
The C# Lydian scale: C#, D#, E#, F##, G#, A# and B#. It covers every chord tone except F#, the eleventh, which Lydian raises to F##.
