semicord

C C major chord

Notes
C E G
Formula
1 3 5
Semitones
0 4 7 above the root
Other symbols
CM, Cmaj

C to E is a major third (4 semitones), E to G is a minor third (3 semitones). The major triad: a major third with a minor third on top, the tonic chord of the key of C major.

C on the piano

C4D4E4F4G4A4B4C5D5E5F5G5A5B5C#4Eb4F#4Ab4Bb4C#5Eb5F#5Ab5Bb5CC4EGC5

Root position from C4: C4, E4, G4. Middle C is C4.

C on the guitar

Standard tuning (E A D G B E). Strings run low E on the left to high e on the right, frets downwards; × is a muted string, ○ an open string, and each dot shows the note it sounds, with the root in blue-green. Every shape below has C as its lowest note.

×CCEEGCCE
Open position
x 3 2 0 1 0 (low E to high e)
Sounds C3 E3 G3 C4 E4
×CCGGCCEEGG
A-shape barre, root on the A string at fret 3
x 3 5 5 5 3 (low E to high e)
Sounds C3 G3 C4 E4 G4
8frCCGGCCEEGGCC
E-shape barre, root on the E string at fret 8
8 10 10 9 8 8 (low E to high e)
Sounds C3 G3 C4 E4 G4 C5

The barre shapes are movable: an E-shape chord's root is the note under your first finger on the low E string, an A-shape chord's root is the note on the A string. Slide the same grip up or down to play major chords on other roots.

Inversions of C

An inversion puts a note other than the root in the bass. The name is what semicord's chord finder calls those notes played bottom to top; a slash name like C/E means a C chord with E in the bass.

PositionNotes, bass firstNamedListen
Root positionC E GC
1st inversionE G CC/E
2nd inversionG C EC/G

Where C fits

C is I in C major, IV in G major, V in F major, V in F minor. As V in a minor key it comes from the harmonic minor scale, whose raised seventh degree is this chord's third, E.