Interactive Music Theory Tool
Chord Staff Explorer
Explore every diatonic chord in the C major scale. See each chord on the treble staff and piano keyboard, compare inversions, and learn its notes, Roman numeral, quality, and harmonic function.
ChordC major
NotesC · E · G
Roman numeralI
QualityMajor
Treble staff
C major in root position
Piano keyboard
Matching piano keys
RootC
ThirdE
FifthG
How the chord is built
Major triad: root, major third and perfect fifth.
Its role in C major
C major is the tonic chord. It feels stable and sounds like home.
1st degree
Tonic
Root position
C major selected. Notes C, E and G are shown on the staff.