Roman Numeral Converter

NumbersNew

Type a number (1–3999) or a Roman numeral and instantly see both representations. Includes a quick-reference table of key Roman numeral values.

Decimal

⇄

Roman Numeral

Valid range: I (1) through MMMCMXCIX (3,999)

Reference

Unus

Quinque

Decem

Quinquaginta

100

Centum

500

Quingenti

1,000

Mille

Works great for

🎓

Students learning conversions

Practice converting Roman numerals to Arabic numbers and back for history or math class. Instant feedback helps reinforce Roman numeral rules quickly.

🎬

Movie & TV copyright years

Decode the Roman numeral copyright year shown at the end of films and television credits. Quickly look up MCMXCIX or MMXXIV without mental arithmetic.

📜

Historians reading ancient dates

Translate Roman numeral dates found in manuscripts, inscriptions, and historical texts. Essential for researchers interpreting Latin documents and classical sources.

🕐

Clock & watch face designers

Convert hour numbers to Roman numerals for custom clock and watch face designs. Ensure accurate numeral placement from I through XII without guessing.

📖

Book chapter numbering

Generate Roman numerals for book chapters, preface pages, and table of contents entries. Standard publishing practice uses Roman numerals for front matter pagination.

⚖️

Legal document outlines

Format legal briefs and document outlines using Roman numeral section headings. Court filings and formal contracts traditionally use Roman numerals for top-level outline structure.

roman numeral converterroman numeralsconvert roman numeralsroman to decimaldecimal to romanroman numeral translatorroman numeral datelatin numeralsMMXXVII V X L C D M

Frequently asked questions

How do I convert a number to Roman numerals?

Type a number between 1 and 3999 and the equivalent Roman numeral appears instantly. Type a Roman numeral instead and its decimal value is shown, so conversion works in both directions.

What is the largest number this converter supports?

It supports numbers from 1 to 3999, written as I through MMMCMXCIX, which covers the standard range of classical Roman numeral notation without special overline symbols for larger values.

Is this Roman numeral converter accurate for dates and years?

Yes. Entering a year like 2026 converts it to its correct Roman numeral form, which is useful for engravings, movie credits, or anniversary dates written in Roman numerals.

Does the tool explain what each Roman numeral symbol means?

Yes. A quick-reference table lists the key values such as I, V, X, L, C, D, and M alongside their decimal equivalents, so you can look up individual symbols without converting a full number.