Roman Numeral Studio
Write a progression in Roman or Nashville numbers and move it to any key. Gives you one chart that works everywhere.
🎷Part of theJazz Chord Fundamentalsguided course.
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Compose, chart, and transpose with these chords
Roman numeral studio scales
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Deepen your understanding with the structured lesson behind this tool.
Questions
How do I write chord progressions using Roman numerals?
Open the Compose tab, type Roman numeral notation (like I-vi-IV-V), and select a key. The studio converts your notation into actual chord names instantly. Transpose to any key by changing the root.
What do uppercase and lowercase Roman numerals mean?
Uppercase numerals (I, IV, V) represent major chords. Lowercase (ii, iii, vi) represent minor chords. Lowercase with a circle (viio) represents diminished. The composer follows standard music theory conventions and supports sevenths, ninths, suspensions, and inversions.
What is the Nashville Number System?
The Nashville Number System uses Arabic numerals (1, 4, 5) instead of Roman numerals to represent chords by their scale degree. It is widely used in country, gospel, and session music because it makes transposition instant. Open the Nashville tab to convert your progression and re-key the chart on the fly.
What is the difference between Nashville numbers and Roman numerals?
Both systems represent chords by scale degree. Roman numerals (I, IV, V) are used in classical and jazz theory and use case to indicate chord quality. Nashville numbers (1, 4, 5) are used in session playing and transpose charts instantly by changing the declared key.
How do I transpose a chord progression to a different key?
Open the Transpose tab, paste your progression, and shift by semitones or pick a quick-shift interval. The interval relationships stay the same, so the progression feels harmonically identical in the new key. Common reasons to transpose include matching a vocalist's range, finding easier guitar shapes, or adapting for a different instrument.