Number to Roman Numeral Converter

Write numbers as Roman numerals, including large values.

Standard subtractive forms apply (IV, IX, XL, XC, CD, CM); M repeats freely. 4,000 and above render with a leading V̄, X̄ etc. for the thousands — unicode combining overline.

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Converts 1–3,999 with standard subtractive notation and Beyond that uses the traditional overline (vinculum) convention for the thousands.

The subtractive pairs IV, IX, XL, XC, CD and CM date from classical Rome; anything else you meet is a later copyist invention.

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