A Major Seventh Chord

Chord Tones: A Major Seventh Chord

Symbol: maj7, M7, △7 — Formula: 1-3-5-7

Chord Notation

Roman numeral (e.g. I, IV, V) and Nashville Number notation are key-dependent. See Keys pages for chord function within specific keys.

Inversions

Harmonic Function

The A major seventh chord commonly functions as the submediant (vi) in C major or dominant (V) in D major. Its harmonic role varies by key — in major keys it provides extended harmonic tension.

The major seventh chord adds a major seventh to the major triad, creating a lush, sophisticated sound. It is central to jazz harmony and gives a dreamy, unresolved brightness. The A Major Seventh Chord specifically contains 4 notes: A, C♯, E, G♯ (formula: 1-3-5-7). On guitar, A-rooted chords anchor to the open A string (5th string), and barre chord shapes rooted on A form the basis of the "A-shape" CAGED system. Blues, rock, and country music use A-rooted chords extensively — the classic 12-bar blues often starts on A, and many rock power chord riffs center on the open A string.

Common Progressions

The A Major Seventh Chord frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

• Imaj7-IVmaj7
• Imaj7-ii-V

Songs Featuring the Major Seventh Chord

Well-known songs where the A Major Seventh Chord — or this chord type — plays a prominent role:

• Don't Know Why – Norah Jones
• Misty – Erroll Garner
• Easy – Commodores

Tuning Frequencies Across Temperaments

Frequencies shown at A=440 Hz. View full temperament data for any note.

Scales Containing the A Major Seventh Chord

These scales include the A Major Seventh Chord as a diatonic or characteristic chord: