Chords in the Key of C Major
The key of C major contains seven diatonic chords built from the notes C, D, E, F, G, A, and B. Because C major has no sharps or flats, it is the most straightforward key for understanding how chords relate to scales — making it the perfect starting point for composers and songwriters.
The 7 Triads in C Major
When you harmonize the C major scale in thirds, you get these seven triads. Each chord is built by stacking every other note from the scale:
| Degree | Roman Numeral | Chord | Notes | Quality |
|---|---|---|---|---|
| 1st | I | C major | C – E – G | Major |
| 2nd | ii | D minor | D – F – A | Minor |
| 3rd | iii | E minor | E – G – B | Minor |
| 4th | IV | F major | F – A – C | Major |
| 5th | V | G major | G – B – D | Major |
| 6th | vi | A minor | A – C – E | Minor |
| 7th | vii° | B diminished | B – D – F | Diminished |
Notice the pattern: Major – minor – minor – Major – Major – minor – diminished. This pattern is the same for every major key — only the root notes change. You can explore this pattern for any key using the C major scale harmonizer.
Seventh Chords in C Major
Adding a fourth note (the seventh) to each triad creates richer, more colorful chords. These are essential for jazz, R&B, neo-soul, and modern pop:
| Degree | Chord | Notes | Type |
|---|---|---|---|
| I | Cmaj7 | C – E – G – B | Major 7th |
| ii | Dm7 | D – F – A – C | Minor 7th |
| iii | Em7 | E – G – B – D | Minor 7th |
| IV | Fmaj7 | F – A – C – E | Major 7th |
| V | G7 | G – B – D – F | Dominant 7th |
| vi | Am7 | A – C – E – G | Minor 7th |
| vii | Bm7b5 | B – D – F – A | Half-diminished |
Common Chord Progressions in C Major
These are the most popular progressions composers use in C major. You can hear and explore all of them in our chord progressions library:
I – V – vi – IV (C – G – Am – F)
The most used progression in pop music. Songs like "Let It Be" (The Beatles), "No Woman, No Cry" (Bob Marley), and "Someone Like You" (Adele) use this pattern. Its strength comes from the satisfying resolution of V back to vi, creating an emotional arc that listeners find compelling.
I – vi – IV – V (C – Am – F – G)
The classic "50s progression" or "doo-wop" changes. You'll hear it in "Stand By Me" (Ben E. King) and countless early rock and roll songs. It cycles through all three chord qualities — major, minor, major, major — creating a gentle, timeless feel.
I – IV – V (C – F – G)
The foundation of blues, rock, and country music. Three chords is all you need for hundreds of songs. This progression works because IV and V are the closest harmonically related chords to the tonic (I).
ii – V – I (Dm7 – G7 – Cmaj7)
The backbone of jazz harmony. This progression creates a strong sense of forward motion through the circle of fifths. Use seventh chords for the authentic jazz sound.
vi – IV – I – V (Am – F – C – G)
Starting on the vi chord gives a minor-key flavor while staying in C major. Used in "Numb" (Linkin Park), "Africa" (Toto), and many modern pop and rock songs.
The C Major Scale on Guitar
All of these chords are derived from the C major scale. Understanding the scale helps you see why certain chords belong together and how to solo over them. Explore the full fretboard diagram:
- C Major scale — interactive fretboard diagram
- C Major harmonizer — all triads and 7th chords
- C Major arpeggio — fretboard positions
Tips for Composing in C Major
- Start with I, IV, and V (C, F, G) to establish the key, then add vi (Am) and ii (Dm) for variety.
- Use the relative minor — A minor shares the same notes as C major. Switching between C and Am sections creates contrast without leaving the key.
- Add seventh chords to create sophistication. Replacing C with Cmaj7 or Am with Am7 instantly adds a jazzy or dreamy quality.
- Try borrowed chords — an Fm or Bb (from C minor) can add unexpected color to a C major progression.
- Explore arpeggios for melodic ideas. Playing the notes of each chord individually is a powerful way to create melodies that follow the harmony.
Ready to explore more keys? The same chord-building principles apply to every major scale. Use the scale harmonizer to discover the chords in any key.