Which Notes Make Up a Chord? Chord Tones Explained
Want to know which notes are in any chord? See the notes behind C major through Cm7, learn how chords are built, and pick a root to hear them in a tool.
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What Are Chord Tones?
Chord tones are the individual notes that make up a chord. Play a C major chord and you’re really playing three separate notes at once: C, E, and G. Those three are the chord tones. Knowing which notes belong to which chord is the groundwork for playing, writing, and improvising in any style.
Hear it first
Seeing the notes laid out on a keyboard makes the idea concrete fast.
- Open the Chord Finder
- On the “Search by name” tab, choose a root of C and the chord type “M” (major)
- The notes C, E, and G light up on the piano below
- Press ▶ to hear them, then switch the type to “m” and listen again
Listen for the single note that moved: only the middle tone shifted down a half step, from E to E♭, and that’s the whole difference between major and minor. One note changes the entire mood.
How Chords Are Built
Chords are constructed by stacking intervals — most commonly thirds — starting from a root note.
A triad uses three notes: root, third, and fifth. A seventh chord adds one more third on top: root, third, fifth, and seventh.
Major Triad
Built from a root, major third (+4 semitones), and perfect fifth (+7 semitones).
C major: C – E – G
Minor Triad
Built from a root, minor third (+3 semitones), and perfect fifth (+7 semitones).
C minor: C – Eb – G
Dominant 7th Chord
A major triad plus a minor seventh (10 semitones above the root).
C7: C – E – G – Bb
Major 7th Chord
A major triad plus a major seventh (11 semitones above the root).
Cmaj7: C – E – G – B
Minor 7th Chord
A minor triad plus a minor seventh.
Cm7: C – Eb – G – Bb
Common Chord Tones Table
| Chord | Notes |
|---|---|
| C | C · E · G |
| Cm | C · E♭ · G |
| C7 | C · E · G · B♭ |
| Cmaj7 | C · E · G · B |
| Cm7 | C · E♭ · G · B♭ |
| Cdim | C · E♭ · G♭ |
| Caug | C · E · G# |
| Csus4 | C · F · G |
Why Chord Tones Matter
- Piano/guitar voicing — knowing chord tones lets you choose which notes to play in which octave
- Improvising — targeting chord tones over changes makes solos sound intentional
- Ear training — hearing individual chord tones builds harmonic awareness
What to try next
Pick one root, say C, and step through its major, minor, 7th, and maj7 versions in the tool. Watch how the top notes pile up while the root stays put, and listen to each addition change the feeling. Then flip to “Identify by notes,” tap three or four keys, and see what chord you built. Working in both directions is the fastest way to make chord tones second nature. If a symbol itself (like add9 or a slash chord) is the confusing part, see how to read chord symbols.
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