Number to Roman Numerals

Use Number to Roman Numerals

Turn a positive whole number into Roman numeral notation for a chapter label, numbered list, or other text. The Number to Roman Numerals tool helps change the notation while keeping the value the same. Review the output before using it in a title, label, or reference.

How the notation works

Break the number into values represented by M, D, C, L, X, V, and I. Use standard subtractive pairs for 4, 9, 40, 90, 400, and 900, then join the pieces in descending value order.

Worked examples

49 becomes XLIX: XL represents 40 and IX represents 9. The number 944 becomes CMXLIV: CM is 900, XL is 40, and IV is 4.

Know the basic symbols

I represents 1, V is 5, X is 10, L is 50, C is 100, D is 500, and M is 1,000. A symbol repeated in a valid additive group contributes its value each time. Subtractive notation uses specific accepted pairs, not every possible combination.

Frequently asked questions

What input does this tool expect?

Enter a whole number from 1 through 9,999. The form uses that range, and the server clamps submitted values to it before converting to an integer. Above 3,999 it repeats M rather than adding overbars. Stay within the stated range and do not rely on out-of-range or fractional inputs. The common modern convention has no standard zero symbol. Historical and extended notations can differ.

Why do some clocks show IIII?

Historical and decorative usage can differ from the common subtractive form IV. Use the convention required by your source or design. A converter's acceptance of nonstandard forms must be checked separately.

Related converters

Unit converter tools | Roman Numerals to Number | Decimal converter | Text separator