C Major Seventh Chord

Chord Tones: C 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 C major seventh chord commonly functions as the tonic (I) in C major/minor. 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 C Major Seventh Chord specifically contains 4 notes: C, E, G, B (formula: 1-3-5-7). On piano, C-rooted chords sit entirely on white keys in their basic triad form, making them the first chords most students learn. Pop, folk, and singer-songwriter music heavily use C-rooted chords because open-position guitar voicings and piano shapes are immediately accessible.

Common Progressions

The C 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 C 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 C Major Seventh Chord

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