Key Finder
Pick any key and see its notes, its seven diatonic chords, its relative major or minor, and the chords that fit in it.
Key of C major
Notes: C – D – E – F – G – A – B
Relative minor: A minor — the same notes, a different home chord.
Diatonic chords
| Degree | Chord | Role |
|---|---|---|
| I | c major | Tonic — home |
| ii | d minor | Colour chord |
| iii | e minor | Colour chord |
| IV | f major | Subdominant |
| V | g major | Dominant — pulls home |
| vi | a minor | Colour chord |
| vii° | b dim | Leading tone — tense |
How it works: A major key is built from the major scale (W–W–H–W–W–W–H). Its seven diatonic chords are stacked in thirds from each scale degree: I, ii, iii, IV, V, vi, vii°. The natural minor key uses the same notes starting from the 6th degree.
Try next: Scale Finder · Guitar Scale Finder · Piano Scale Finder