Music theory can sometimes feel overwhelming, but don't worry – there are tools to help you make sense of it all. When it comes to chords and harmony, one cool trick is the use of Roman numerals, which really do make things easier to grasp.

In this article, we'll explain what Roman numerals are, what they mean on a music sheet, share some charts, and show how to use this feature in Flat's music notation software.
What are Roman numerals in music?
Roman numerals in music theory are used as a notation system for identifying chords within the framework of key signatures. They specify the scale degree of the chord's root, indicate the chord's quality, and highlight any extensions or inversions within the chord.

How do Roman numerals work in music?
1. Roman Numerals tell us where a chord starts in the scale. No matter what key the music is in, the Roman numeral shows where the chord starts in the scale.
2. Roman numerals tell us the type of chord. Uppercase numbers signify major chords, while lowercase numerals signify minor chords. Example for C major:
- Cmaj = I, Dm = ii, Em = iii, Fmaj = IV, Gmaj = V, Am = vi, Bᵒ = vii
3. Roman numerals can indicate alterations. A ᵒ indicates diminished, ∅ signals semi-diminished, + shows augmented. A small number like 7 (V7) means you're adding the 7th to the chord.
Roman numerals chart

Using Roman numerals in Flat
We've added a new text-based input for Roman numerals, making workflows faster. The system now displays the Roman numerals it reads from your score to the left of the text input.

Learn how to use this feature in Flat here.
