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An interactive reference for guitar chord shapes, voicings and the theory behind them.

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  1. Chords
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  3. B♭
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  5. 13

B♭ 13th (B♭13)

B♭Root
DMaj 3
A♭min 7
C9
G13

Maximum extension. Usually played as subset (omit 11th, sometimes 5th). Big band and jazz standard.

Notes
B♭DA♭CG
Formula
1 · 3 · ♭7 · 9 · 13
Type
Extended chord
03

How to play it

EADGBe124412345

B♭13

B♭ 13th, Open

Bass
B♭, the root
Root
B♭
Strings
A D G B e · open
  • B♭Root
  • DM3
  • A♭m7
  • C9
  • G13

Up the neck

6 voicings, same five notes

Why a 13th chord sounds the way it does

B♭+4 fretsD+6 fretsA♭+4 fretsC+7 fretsG

Stacked from 4 intervals.

04

Where to go next

More B♭ chords

Same root, other colours

B♭maj7B♭7B♭add9B♭6B♭sus2B♭sus4B♭maj9B♭6/9

Chords in the key of B♭

What B♭13 usually sits next to

I · B♭ii · Cmiii · DmIV · E♭V · Fvi · Gmvii° · A°

Close relatives

Relatives of B♭ major

  • GmRelative minor of B♭ major
  • B♭mParallel minor, lower the 3rd

Other 13 chords

Same quality, every root

C13C♯13D13E♭13E13F13F♯13G13A♭13A13B♭13B13
01

Root

B♭
02

Quality

13

5+ notes: stack the 9th, 11th or 13th on a 7th chord.

Why a 13th chord sounds the way it does

B♭+4 fretsD+6 fretsA♭+4 fretsC+7 fretsG

Stacked from 4 intervals.

03

How to play it

EADGBe124412345

B♭13

B♭ 13th, Open

Bass
B♭, the root
Root
B♭
Strings
A D G B e · open
  • B♭Root
  • DM3
  • A♭m7
  • C9
  • G13

Up the neck

6 voicings, same five notes
04

Where to go next

More B♭ chords

Same root, other colours

B♭maj7B♭7B♭add9B♭6B♭sus2B♭sus4B♭maj9B♭6/9

Chords in the key of B♭

What B♭13 usually sits next to

I · B♭ii · Cmiii · DmIV · E♭V · Fvi · Gmvii° · A°

Close relatives

Relatives of B♭ major

  • GmRelative minor of B♭ major
  • B♭mParallel minor, lower the 3rd

Other 13 chords

Same quality, every root

C13C♯13D13E♭13E13F13F♯13G13A♭13A13B♭13B13
B♭ 13th