Roman Numeral Converter

Using standard notation, Roman numerals can represent whole numbers from 1 to 3999, written as MMMCMXCIX. This upper limit exists because the system only has seven basic symbols — I, V, X, L, C, D, and M — and each one can only be repeated so many times before the notation becomes ambiguous or impossibly long.

There's also no Roman numeral for zero, and there's no built-in way to represent negative numbers, decimals, or fractions using the standard letters. The Romans themselves had separate (and much less common) notations for fractions based on twelfths, but those aren't part of the numeral system most people mean when they say "Roman numerals" today.

For numbers larger than 3999, historical Roman numeral inscriptions sometimes used a horizontal line, called a vinculum, drawn above a symbol to multiply its value by 1,000. That extended notation is rarely used in modern contexts, so this converter focuses on the standard 1–3999 range, which covers virtually every everyday use case: years, page numbers, clock faces, movie sequels, and book or chapter numbering.

2024 is written as MMXXIV in Roman numerals. Breaking it down: MM represents 2000 (two thousands), XX represents 20 (two tens), and IV represents 4 (one less than five, using the subtractive rule).

The general method for converting any number to Roman numerals is to work from the largest place value down to the smallest. Split the number into thousands, hundreds, tens, and ones, then convert each group separately using the standard symbol chart (I, V, X, L, C, D, M) before joining the results together. This is exactly what the Number → Roman mode above does automatically for any value from 1 to 3999.

For context, nearby years follow the same pattern: 2023 is MMXXIII, 2025 is MMXXV, and 2030 is MMXXX. If you need a different year, birthday, or any other number converted instantly, just type it into the converter at the top of this page.

Yes, this Roman numeral converter is completely free to use online, with no sign-up, account, or payment required. You can use it as many times as you like, for personal or professional projects.

It works directly in your browser on both desktop and mobile, so there's nothing to download or install. All three conversion modes — Number → Roman, Roman → Number, and Date → Roman — are available every time you visit the page, and results appear instantly as soon as you submit a value.

The tool is designed to be useful for students checking homework, teachers preparing lessons, designers and jewelers working on custom engravings, and anyone who just needs a quick, accurate answer without wading through ads or pop-ups.

Yes. Switch to Date → Roman mode above, pick any date from the calendar, and the tool converts the month, day, and year into Roman numerals in one step — no need to convert each part manually.

The result is formatted as month.day.year, so a birthday like August 31, 2026 becomes VIII.XXXI.MMXXVI. Each segment is converted using the exact same rules as the Number → Roman mode, which means the output is always mathematically accurate and consistent.

This date-conversion feature is especially popular for personal and sentimental uses: turning a birth date into a tattoo, engraving a wedding date on a ring or invitation, adding a special anniversary to a piece of wall art, or including a memorable date on a custom gift.

As of 2026, the current year in Roman numerals is MMXXVI. Because this page calculates the answer live from your device's date every time it loads, this stays accurate automatically — you'll never see an outdated year here, even after January 1st rolls around.

People look up the current year in Roman numerals for all sorts of reasons: engraving a graduation year, dating a building's cornerstone, formatting a movie or TV copyright notice (which traditionally uses Roman numerals), or designing a watch or clock face that displays hours or the year in Roman style.

If you need a different year instead of the current one, just switch to Number → Roman mode and type in any four-digit year between 1 and 3999 to get an instant conversion.

Yes. Scroll up to the "Roman Numerals 1 to 100 Chart" section above the FAQs for a complete, easy-to-scan reference table pairing every number from 1 to 100 with its Roman numeral equivalent.

The chart is generated automatically, so every value is calculated using the same accurate logic as the main converter rather than being typed out by hand, which means there's no risk of a typo slipping into the reference table.

If you need a number beyond 100 — anywhere up to 3999, covering the full practical range of standard Roman numerals, including 1 to 1000 — just enter it into the Number → Roman converter at the top of the page instead of scrolling through a longer chart.

The Roman numeral system is built on a small set of consistent rules. First, the repetition rule: I, X, C, and M can be repeated up to three times in a row to add their value (III = 3, XXX = 30, CCC = 300), while V, L, and D are never repeated — you'll never see VV or LL in a valid Roman numeral.

Second, the subtraction rule: when a smaller-value symbol is placed immediately before a larger one, its value is subtracted rather than added. This is how you get IV for 4 (instead of IIII), IX for 9, XL for 40, XC for 90, CD for 400, and CM for 900. Third, the addition rule works the opposite way — a smaller symbol placed after a larger one simply adds to it, as in VI for 6, XI for 11, and LX for 60.

Put together, these three rules are exactly what the numberToRoman logic behind this converter follows, symbol by symbol, to build (or read) any valid Roman numeral between 1 and 3999.

Yes. Switch to Roman → Number mode, type in any valid Roman numeral, and the converter instantly returns its decimal (Arabic numeral) value. In this mode the tool essentially works as a Roman numeral decoder or translator, doing the reverse of the Number → Roman conversion.

Behind the scenes, the converter reads the Roman numeral from left to right, symbol by symbol. If a symbol's value is smaller than the value of the symbol right after it, that value is subtracted from the running total; otherwise it's added. This mirrors the subtraction and addition rules covered above, so the result is always consistent with standard Roman numeral notation.

This direction is useful whenever you come across a Roman numeral in the wild and need to know what number it actually stands for — on a clock face, in a book's front matter, on a movie's copyright line, in a chapter heading, or carved into an old inscription or monument.

Yes. Date → Roman mode isn't limited to birthdays — it works for any calendar date you enter, which makes it just as useful for wedding days, anniversaries, engagement dates, and memorial dates.

Common examples include converting a wedding date for a ring engraving or invitation design, turning an anniversary into a framed piece of art, or marking a memorial date in a way that feels a little more timeless than standard digits.

Since each date is converted fresh every time, you can repeat the process for as many dates as you need — for example, converting both a couple's wedding date and their individual birthdays for a family keepsake — simply by selecting a new date and submitting the form again.