Roman numerals chord progression converter

Click a preset or enter your own Roman progression.

• Uppercase = major, lowercase = minor. • Add ° for diminished, ø for half-dim. • Optional accidentals before the numeral: bVII, #iv. • Suffixes kept: 7, maj7, sus, add9…

All 12 keys

Key	Progression

Notes

This tool uses simple enharmonic spelling (sharp keys show sharps, flat keys show flats) and diatonic degree mapping. Case sets default triad quality (I vs i). Diminished (°) and half-dim (ø) override case. Suffixes like 7/maj7/sus/add are appended to the chord root.

Examples: V7 → dominant 7th, Imaj7 → major-7th, iiø7 → half-diminished 7th (m7♭5), vi → minor, bVII → flat seven degree.