Roman Numeral Converter - Free Dates & Numbers

This Roman numeral converter turns any date, or any whole number from 1 to 3,999, into Roman numerals, and it also converts Roman numerals back into regular numbers. It is built for people planning tattoos, wedding invitations, anniversary gifts and designs. Pick a date, choose a format, and copy the result.

What Are Roman Numerals and How Are They Written?

Roman numerals are a number system built from seven letters: I (1), V (5), X (10), L (50), C (100), D (500) and M (1000). When a smaller symbol follows a larger one, you add the values, so VIII is 5 + 3 = 8.

When a smaller symbol comes before a larger one, you subtract it. That gives six standard pairs: IV (4), IX (9), XL (40), XC (90), CD (400) and CM (900). Standard form never repeats I, X, C or M more than three times in a row, and V, L and D are never repeated. That is why 4 is written IV, not IIII, and 9 is IX, not VIIII.

Quick reference

The converter stops at 3,999 (MMMCMXCIX) because 4,000 would need four Ms in a row, which standard notation avoids. There is also no symbol for zero, so the smallest value is 1.

How to Use the Roman Numeral Converter

To convert a date, open the Date Converter tab, set the month, day and year, then press Convert Date. The form starts with today's date already selected.

1. Open the Date Converter tab.
2. Choose the Month from the list, then the Day. The day list matches the length of the month, including February in leap years.
3. Type the Year, anywhere from 1 to 3999.
4. Pick a Date Format: MM . DD . YYYY, DD . MM . YYYY or YYYY . MM . DD.
5. Choose a Delimiter: dot, bullet, dash, space, underscore or slash.
6. Click Convert Date. The Roman Numerals and Arabic Numerals results appear, each with its own copy button.

Converting a single number

Switch to the Number Converter tab for one value at a time. Choose Number to Roman, type a whole number from 1 to 3,999 in the "Enter a number" field, and the Roman numeral appears as you type. Choose Roman to Number, type letters such as MMXXIV in the "Enter Roman numerals" field, and you get the matching number. A copy button sits next to the result.

What Does a Converted Date Look Like? Worked Examples

A converted date is each part of the date (day, month and year) written as its own Roman numeral, joined by your chosen delimiter. Here is a birthday, step by step.

Take July 14, 1990 with the format DD . MM . YYYY and the dot delimiter:

• Day 14 = X (10) + IV (4) = XIV
• Month 7 = V (5) + II (2) = VII
• Year 1990 = M (1000) + CM (900) + XC (90) = MCMXC

The Roman Numerals result is XIV.VII.MCMXC. Switch the format to MM . DD . YYYY and the same date becomes VII.XIV.MCMXC. Change the delimiter to a dash and you get VII-XIV-MCMXC. The Arabic Numerals line shows the same date in regular digits, so you can confirm the order is what you intended.

For a single number, entering 2024 returns MMXXIV, because MM is 2000, XX is 20 and IV is 4. Going the other way, entering MCMXC returns 1990 by adding 1000 + 900 + 90.

How Do You Read and Check the Results?

Read the Roman line from left to right in the order you selected, then compare it with the Arabic line underneath. If both lines show the same date in the same order, the conversion is ready to use.

Check the order first

A date like 07.04.2025 means July 4 in the United States but April 7 in much of the rest of the world. Roman numerals keep that ambiguity: VII.IV.MMXXV reads exactly as confusingly. Use MM . DD . YYYY for a US audience, DD . MM . YYYY for the UK and most of Europe, and YYYY . MM . DD when you want the year first.

Check the year

A quick sanity test helps. Years from 2000 to 2099 start with MM. Years in the 1900s start with MCM. Years in the 1800s start with MDCCC. If your year does not begin that way, recheck what you typed.

Pick a delimiter for the look you want

Dots and dashes look clean on a tattoo or ring. A bullet suits engraving and print design. A space reads like a word-style date, and a slash feels like a traditional written date.

Who Uses a Roman Numeral Date Converter?

Anyone who wants a date to look timeless can use it, and the most common cases are personal ones.

• Tattoos and jewelry: birthdays, anniversaries and memorial dates, often searched as a birthday or date of birth conversion.
• Weddings: invitations, signs, napkins and save-the-dates that use a date such as XII.VI.MMXXVI.
• Gifts and keepsakes: engraved watches, frames and cutting boards. If you want to pair the date with a milestone, an age calculator can tell you exact days lived or years together.
• Students: checking homework and learning the chart from I to X (I, II, III, IV, V, VI, VII, VIII, IX, X).
• Designers and writers: numbering chapters, sections, film-style copyright years and event posters.

If you enjoy switching between number systems, you may also like the binary translator, which converts text and binary in both directions.

Best Practices, Common Mistakes and Troubleshooting

Most bad results come from entering the wrong value or misreading the date order, not from the conversion itself. These checks catch the usual problems.

• Verify before you commit. For a tattoo, print order or engraving, convert the Roman answer back with Roman to Number and confirm you get the same day, month and year.
• Do not shortcut subtraction. People often write IC for 99, but the standard form is XCIX (XC + IX). Likewise, 49 is XLIX, not IL.
• Keep numerals in standard form when converting back. Enter capital letters such as MMXXIV. Forms like IIII, VV or mixed-up orders are not standard, and the result may not be meaningful.
• Stay inside the range. The year and number fields accept 1 to 3999. Zero, negatives, decimals and larger values cannot be written in standard Roman notation.
• Re-check the day after changing months. If you picked 31 and then switched to a month with 30 days, the day moves to the last valid day of that month.
• Set the year before February 29. That day appears only when the chosen year is a leap year.
• Pick the format on purpose. The default is MM . DD . YYYY. Change it if your reader expects the day first.

Limits and Accuracy Notes

The converter writes numbers in the modern standard form taught in schools and used in design. It handles whole numbers from 1 to 3,999 and does not use bars over letters to reach larger values.

It converts digits only. It does not translate between calendars, so a date before the Gregorian calendar was adopted is converted as a plain day, month and year, not adjusted from the Julian calendar. Ancient Romans also did not write dates in this day-month-year style, so treat the result as a modern decorative format. Some clock faces use IIII for 4 as a traditional variant, but the tool follows the standard IV.

With a date picked and a delimiter chosen, you can have a clean Roman numeral date in seconds. Try the converter on this page, copy the result, and check it against the Arabic line before you print, engrave or ink it. For more utilities like this one, browse the online calculators and utilities collection.