A Dominant 13th
A13
Notes
A · C# · E · G · B · F#
Intervals
- RootA (1P)
- Major 3rdC# (3M)
- Perfect 5thE (5P)
- Minor 7thG (7m)
- Major 9thB (9M)
- Major 13thF# (13M)
Fretboard
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About
The A13 dominant thirteenth (A–C♯–E–G–B–F♯) is the fullest expression of dominant harmony. The F♯ (a major sixth above the root) adds warmth and sophistication while the chord’s dominant function — driven by the tritone between 3 and ♭7 — remains intact, still pulling toward D. On guitar, full voicings are impractical; the essential tones are the 3rd, ♭7, and 13th. The 5th, 9th, and sometimes even the root can all be omitted in favor of these three. Common in jazz and funk comping. Compared to A9, the 13 adds a richer, more colorful top end without altering the harmonic direction.
Similar chords
Chords sharing two or more notes with this one, ranked by overlap.
Scales containing this chord
- B Natural Minor (VII)
- D Major (V)
- E Melodic Minor (IV)
- A Mixolydian (I)
- E Dorian (IV)
- F♯ Phrygian (III)
- G Lydian (II)
Scales whose notes include every chord tone. Roman numeral marks the chord root’s position in the scale; dashed badges aren’t linked yet.