Check local times and compare cities at a glance.
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View all articles →Convert whole numbers from 1 to 3999 to standard Roman numerals, or convert them back.
Choose inputs and calculate to see your result.
The converter uses canonical subtractive notation: I, V, X, L, C, D and M, including IV, IX, XL, XC, CD and CM. Inputs are normalized for case and outer whitespace and validated by a round trip. Values outside 1–3999 are rejected.
Gregorian calendar, supported years 1900–2100. Historical local calendar reforms are not modeled.
The Gregorian calendar and stated calculation policy apply. Check official rules before using results for legal deadlines.
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