Write a date such as a wedding day or a birthday in Roman numerals
Runs in your browser. Nothing you type is sent anywhere. Updated on 25 Oct 2026.Dates in Roman numerals turn up on tattoos, wedding invitations, rings and memorial plaques, and a mistake there is expensive to fix. Pick the day, month and year, choose the order and the separator, and each part is converted with the standard rules, so 29 September 2026 becomes XXIX.IX.MMXXVI.
Open the page with the date section at the top, set to today.
Pick your date in the Date field.
Choose the Order, such as Day Month Year, and the Separator, such as Dot or Slash.
Press Copy beside the result, which reads like XXIX.IX.MMXXVI.
Paste a Roman date into the main box to check one you already have.
The Roman Numeral Converter works in both directions from one box. Type a number such as 1994 and you get MCMXCIV, broken into its pieces, M + CM + XC + IV, and their values, 1,000 + 900 + 90 + 4. Type or paste a numeral in capitals or lower case and you get the number back.
Checking is strict, because the point of a converter is often to catch a mistake before it is printed or engraved. A numeral is accepted only in its standard form, and when it is not, the tool names the rule it breaks. IIII is refused because I repeats at most three times, and the page mentions that clock faces use IIII by custom. VX is refused because V, L and D are never subtracted. IC is refused because I is subtracted only from V and X, and the tool suggests XCIX for 99. VV, symbols out of order and letters that are not numerals each get their own message.
Dates are converted part by part. Type 29.9.2026, or use the date fields, and get XXIX.IX.MMXXVI, with a choice of day-month-year, month-day-year or year-month-day and five separators. Impossible dates such as 29 February in a year that is not a leap year are refused. Paste a Roman date back to read it.
The rest of the article, and all 6 questions about Roman Numeral Converter, are on the Roman Numeral Converter page.
Type the number, from 1 to 3,999, and the numeral appears as you type with its pieces shown underneath. The method is to take the largest value that fits, from M 1000, CM 900, D 500 down to I 1, write its symbol and repeat with what is left. 1994 becomes M, CM, XC, IV.
Not in the standard form, where 4 is IV and no symbol repeats more than three times in a row. Many clock and watch faces show IIII anyway, a clockmakers' custom often said to balance the dial against VIII. The converter explains this when IIII is typed and suggests IV.
Standard numerals end at 3,999, written MMMCMXCIX, because there is no standard single sign for 5,000. A bar over a numeral, called a vinculum, was later used to mean times 1,000. Switch on overline notation to write numbers up to 3,999,999 that way, knowing it is a convention and not a fixed rule.
Convert the day, month and year separately and join them with dots or another separator. 29 September 2026 is XXIX.IX.MMXXVI in day-month-year order. The date fields on this page do that for you, check the date exists, and let you choose the order and the separator before you copy it.
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