Roman Numerals Converter

Free Roman Numerals Converter — Numbers to Roman & Back

Roman numerals are the ancient numbering system used by the Romans, still widely used today in clocks, book chapters, movie credits, formal outlines, and official events. Converting between Arabic numbers and Roman numerals involves specific rules about symbol combinations and subtraction pairs. This free Roman Numerals Converter handles both directions — type a number to get the Roman numeral, or enter Roman numerals to get the Arabic number equivalent.

Enter any number from 1 to 3,999,999 and the converter outputs the correct Roman numeral representation. Conversion is instant and handles all the subtraction pairs (IV, IX, XL, XC, CD, CM) automatically. Going the other direction, enter any valid Roman numeral to see the decimal value.

Roman numerals are frequently used in design, typography, and publishing for an elegant, formal appearance. Copyright dates in film and television credits traditionally use Roman numerals (© MMXXIV instead of © 2024). Knowing how to read and write them correctly is a useful skill across many professional contexts.

Roman Numeral Symbol Values

I = 1 — V = 5 — X = 10 — L = 50

C = 100 — D = 500 — M = 1000

Subtraction pairs. IV (4), IX (9), XL (40), XC (90), CD (400), CM (900) — these are the only valid subtraction combinations.

Reading order. Larger values left to right — MMXXIV (2024): MM=2000, XX=20, IV=4. Total: 2024.

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Frequently Asked Questions