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Chord degrees in Roman numerals

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Degrees and function

Roman numerals locate chord roots relative to a tonic. Many analytical systems use uppercase for major triads, lowercase for minor and a small circle for diminished quality. State the convention because not every notation system is identical.

In C major, I–vi–IV–V means C–Am–F–G. The same degree pattern transfers to other keys. These labels do not by themselves describe every voicing or bass inversion; they provide a compact way to compare harmonic movement.

Example

In G major, I–vi–IV–V = G–Em–C–D.

Chord degrees in Roman numerals

C F G C → I IV V I

Try it

Which triad is ii in C major?

AnswerD minor: D–F–A.

Related topics

Building diatonic chords in major · What tonic and dominant do

References

Music Theory for the 21st-Century Classroom

Subject-expert review pending.