Cmaj9 Piano Chord

Cmaj9 is the C major ninth chord. It has five notes: C, E, G, B and D, every one a white key. The stack is wider than an octave, so most players split it: C in the left hand, the rest in the right.

C at the bottom, then E, G, B and D, all white keys. Right hand 1-2-3-4-5 if the span allows; otherwise the C goes to the left hand.

How to play Cmaj9 on piano, step by step

Start on middle C. That is the lowest note of the chord.
Thumb (1): C
Index finger (2): E
Middle finger (3): G
Ring finger (4): B
Little finger (5): D
That reach is wider than an octave, so most players split it: play C with the left hand and the other notes with the right. If you keep it in one hand, leave out the fifth (G), the note the chord misses least.

Every note is white, so this is the clearest place to learn what a major ninth is: a maj7 chord with one more scale step on top. Learn the shape here and it moves to the other keys with black keys mixed in.

If it sounds wrong

The reach is too wide: Play C with the left hand and E, G, B and D with the right. Spanning a ninth in one hand is a big hand's trick, not a requirement.
The top sounds like a mistake: The B and D surround the C an octave up, and the ear can hear that near miss as a wrong note at first. It is the whole point of the chord; let it ring and it settles.
It turns to mud lower down: Five close notes need room. Keep the chord at or above middle C; an octave lower, the small gaps stop sounding soft and start sounding thick.

What makes it a Cmaj9

C · E · G · B · D 1 3 5 7 9

Cmaj9 is Cmaj7 with a ninth added: C, E, G and B make the major seventh chord, and the D on top makes it a ninth. The B a half step below the octave and the D a whole step above it wrap around the missing high C, which is what makes the chord shimmer.

It is the I chord of C major at its softest, and the chord a ii V I in C can land on when a plain C would sound too final. All white keys make it the easiest major ninth to find.

Cmaj9 vs Cmaj7

Cmaj9 is Cmaj7 with a D added on top. Cmaj7 is calm; the ninth makes the calm wider.

The cost is reach. Cmaj7 sits in one hand; Cmaj9 spans a ninth. Split it between hands, or leave out the G, and the chord keeps its whole character.

Questions about Cmaj9

Which notes are in a Cmaj9 chord on piano?

C, E, G, B and D. All five are white keys.

What is the difference between Cmaj9 and C9?

The seventh. C9 has B flat and pushes toward F; Cmaj9 has B natural and stays put. One black key changes the whole mood.

What is the difference between Cmaj9 and Cadd9?

Cmaj9 contains the B, the major seventh. Cadd9 is a plain C chord with a D added and no seventh, which sounds bright rather than dreamy.

Why are there no inversions on this page?

Cmaj9 is wider than an octave, so lifting the C an octave puts it between the B and D instead of on top, a cluster no chart teaches. Players rearrange ninths as rootless voicings, which is its own subject.

Where is Cmaj9 used?

As the I chord in C in jazz, film music and soft pop, anywhere the home chord should sound settled but not finished.