Cmaj7 guitar chord

Cmaj7 (C major seventh) is built from C, E, G and B, the degrees 1–3–5–7. On guitar, the main shape is x 3 2 0 0 0, the first diagram, marked with the star.

An empty café at ten in the morning, somebody drying cups, quiet music nobody chose but everybody approves of. That music is full of chords like Cmaj7. Press play down there.

Hear Cmaj7 before you play

Why Cmaj7 sounds this way

Here's the curious part: B, the new note, lives a half step from C — that close, it should grind. And it does. But E and G hold the room, so the grind turns into shimmer instead of a fight. Play the arpeggio again, no rush all the way to the last note and wait: you'll feel the spark without the fire. It's danger with a seatbelt on — which is why it sounds expensive.

How to play Cmaj7 on guitar

On the guitar, six strings give the chord room to breathe — some positions use them all, others ask you to mute the lowest ones. So go with the first position below — 3 open strings as a bonus; it's the main shape — that's why it carries the ⭐. Then do the before-and-after: C, then Cmaj7. The second is the first one after sunset. Run it a few times: this chord tends to feel odd on the first pass and addictive by the third.

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Higher up the neck this chord becomes comping carpet — the kind of sound that flatters any voice on top. Positions are right below.

Cmaj7 notes and degrees

Cmaj7 stacks the root C, the major third E, the perfect fifth G and the major seventh B.

Where Cmaj7 shows up

Across keys, Cmaj7 works as Imaj7 in C major, VImaj7 in E minor, IVmaj7 in G major — almost always the deluxe I or the elegant IV. Bossa nova made it a signature and the world copied it; today you hear this chord from jazz to indie pop without it asking permission.

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Where Cmaj7 usually goes

Treating Cmaj7 as the home chord (I) of its key, it usually moves toward the pre-dominant (Dm / F) or the dominant (G / B°), and the dominant pulls back home. Typically, not a rule.

Going beyond Cmaj7

For improvising, C Ionian (C D E F G A B · 1 2 3 4 5 6 7: the plain major scale, where everything starts); C Lydian (C D E F# G A B · 1 2 3 #4 5 6 7: the major scale with a raised fourth — one extra step of daydream); C Lydian ♯2 (C D# E F# G A B · 1 #2 3 #4 5 6 7: a lydian with a raised second, harmonic-major color) wrap the whole chord. And the jazz shapes at the end are the same four notes spread across the neck, for the day you want to sound like an arranger.

Scales to improvise over Cmaj7

To improvise over Cmaj7 as home, the C Ionian scale fits entirely: it contains every note of the chord. The best fit depends on the key, the surrounding chords and the tensions you want. And when the dominant (G) pulls back, the leading tone B is the note that wants to resolve home.

Swaps that work:

• Am7Am7Am7Am7 — Relative minor (vi) — same tonic function
• Em7Em7Em7Em7 — Mediant (iii) — tonic function

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Cmaj7 jazz voicings

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If at some point you want the ground back, it's one click away: C without the seventh. The house hasn't moved.

Updated October 20, 2026