A#m13 Guitar Chord Chart and Fingering
A#, C#, E#, G#, B#, D# and F## spell the A#m13 chord (A# minor thirteenth). It sounds identical to Bbm13, whose notes are Bb, Db, F, Ab, C, Eb and G.
The thirteenth above A# is F##, a double sharp, and with E# and B# in the stack as well, the spelling is clumsy to read. Both names describe the same pitches, so only the spelling differs with the key. The flat name avoids all three. The notes themselves form the A# Dorian scale, so the sound is the same however it is notated.
A# minor 13th guitar chord is also written as A#m13, A#min13 or A#-13.
A#m13 Chord Notes and Formula
Notes in the A# m13 chord:
Chord Formula:
Formula: 1 b3 5 b7 9 11 13
Same chord, different name: A#m13 is also written as Bbm13 (Bb minor thirteenth).
A# M13 Chord Interactive Fretboard
Want a structured chord roadmap instead of jumping between pages?
Go to the full guitar chords tutorial.
Download
the Free Guitar Chords Chart Pdf
Chords That Go With A#m13
One key where A#m13 fits is Db major, where it works as the vi chord. These are the main chords of that key, the ones you will often hear around it:
See every key in the guitar keys chart, or build a progression with these chords in the chord progression generator.
More A# Chords
Want to know how this chord is built? Read chord symbols and intervals, or browse all A# guitar chords.
Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes are in A#m13?
A#m13 is spelled A#, C#, E#, G#, B#, D# and F##. That is seven different notes, the A# minor seventh chord plus the ninth, the eleventh and the thirteenth.
Why does A# minor thirteenth contain a double sharp?
The thirteenth is the sixth degree an octave up, so it takes the letter F. A major sixth up from A# lands on F##, which sounds like G. Writing G would repeat the letter used for the minor seventh.
Is A#m13 the same as Bbm13?
Yes. A# and Bb are one pitch, so the chords sound the same. Bbm13 is spelled Bb, Db, F, Ab, C, Eb and G, with no double sharp, which makes it easier to read.
Which scale contains every note of A#m13?
A# Dorian does: A#, B#, C#, D#, E#, F## and G#. The chord uses all seven of its notes, stacked in thirds from the root.
What is the formula of A#m13?
It is 1, b3, 5, b7, 9, 11, 13. In plain terms it is the minor seventh chord extended through the ninth, the eleventh and the thirteenth, which is a major sixth counted an octave higher.
