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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. A
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  5. 13

A 13th (A13)

ARoot
C♯Maj 3
Gmin 7
B9
F♯13

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

Notes
AC♯GBF♯
Formula
1 · 3 · ♭7 · 9 · 13
Type
Extended chord
03

How to play it

EADGBe12312345

A13

A 13th, Open

Bass
A, the root
Root
A
Strings
A D G B e · open
  • ARoot
  • C♯M3
  • Gm7
  • B9
  • F♯13

Up the neck

6 voicings, same five notes

Why a 13th chord sounds the way it does

A+4 fretsC♯+6 fretsG+4 fretsB+7 fretsF♯

Stacked from 4 intervals.

04

Where to go next

More A chords

Same root, other colours

Amaj7A7Aadd9A6Asus2Asus4Amaj9A6/9

Chords in the key of A

What A13 usually sits next to

I · Aii · Bmiii · C♯mIV · DV · Evi · F♯mvii° · G♯°

Close relatives

Relatives of A major

  • F♯mRelative minor of A major
  • AmParallel minor, lower the 3rd

Other 13 chords

Same quality, every root

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

Root

A
02

Quality

13

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

Why a 13th chord sounds the way it does

A+4 fretsC♯+6 fretsG+4 fretsB+7 fretsF♯

Stacked from 4 intervals.

03

How to play it

EADGBe12312345

A13

A 13th, Open

Bass
A, the root
Root
A
Strings
A D G B e · open
  • ARoot
  • C♯M3
  • Gm7
  • B9
  • F♯13

Up the neck

6 voicings, same five notes
04

Where to go next

More A chords

Same root, other colours

Amaj7A7Aadd9A6Asus2Asus4Amaj9A6/9

Chords in the key of A

What A13 usually sits next to

I · Aii · Bmiii · C♯mIV · DV · Evi · F♯mvii° · G♯°

Close relatives

Relatives of A major

  • F♯mRelative minor of A major
  • AmParallel minor, lower the 3rd

Other 13 chords

Same quality, every root

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