Convert Roman numerals to decimal numbers and decimal numbers to Roman numerals instantly. Free, private, offline-ready and without CDN.
Convert standard Roman numerals and decimal numbers for dates, chapters, clocks, outlines, monuments and educational work. The tool validates Roman numeral rules automatically.
I, V, X, L, C, D and M represent 1, 5, 10, 50, 100, 500 and 1000.
Values above 3,999 are shown using parentheses. A value inside parentheses is multiplied by 1,000, such as (V) for 5,000.
Yes. The tool checks subtractive notation and repeated-symbol rules before accepting the input.
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