A key reference starts from its scale and builds a chord on every degree. Read the Roman numeral, symbol and exact notes side by side, then try the original I–IV–V–I listening example.

Compare the relative minor carefully

The relative minor shares a signature but has its own tonic. Minor harmony may raise scale degrees, so a shared signature does not make every major-key chord perform the same role in minor.

Use the table as a starting point

Diatonic means derived from the selected collection here. A piece can include chromatic or borrowed chords, and those choices need context. The tool does not infer a song’s key from a short list of chord names.

Build chords in a selected key Compare key signatures

Chords in C major

Chords in D♭ major

Chords in D major

Chords in E♭ major

Chords in E major

Chords in F major

Chords in F♯ major

Chords in G major

Chords in A♭ major

Chords in A major

Chords in B♭ major

Chords in B major

No references match these filters.

Connect a key with its chords

Compare the relative minor carefully

Use the table as a starting point