# Roman Numeral Converter > Convert numbers to Roman numerals and back in one box, write big numbers with the bar on top, turn any date into Roman numerals for a tattoo, add and multiply Roman numerals, and practice with a quick quiz — plus a full chart. - Page: https://linguaholic.com/tools/roman-numeral-converter/ - Type: free online tool (Converters & translators), no sign-up, runs in the browser - Publisher: Linguaholic (https://linguaholic.com/), made by Marcel Iseli - Last updated: October 2, 2026 - Open it pre-filled: https://linguaholic.com/tools/roman-numeral-converter/?n=1999 - `n`: a number (1-3,999,999) or a Roman numeral for the Convert box; the direction is auto-detected (for example `1999`) - `style`: letter style: upper (default), lower or unicode (for example `lower`) - `date`: a date as YYYY-MM-DD; opens the Date tab with that date in Roman numerals (year 1-3999) (for example `2026-02-14`) - `order`: date order on the Date tab: mdy (default), dmy or ymd (for example `dmy`) - `mode`: which tab opens: convert (default), date, calc or practice (for example `date`) ## What is a Roman numeral converter? A **Roman numeral converter** turns ordinary numbers into Roman numerals and Roman numerals back into numbers. This one does it in a single box — type `2026` or `MMXXVI` and it works out which way to convert. It also shows the place-value breakdown, writes big numbers with the bar on top (up to 3,999,999), turns any date into Roman numerals for tattoos, adds and multiplies Roman numerals, and lets you practice with a quick quiz. ## How to use the converter - **Convert:** type a number (like 1990) or a Roman numeral (like MCMXC). Lowercase, spaces, and pasted Unicode numerals (Ⅻ) all work. Non-standard forms such as `IIII` are read and the standard spelling is shown. Choose capitals, lowercase, or Unicode letters, then tap **Copy**. - **Date:** pick a day, month, and year, choose the order (US month-day-year or day-month-year) and a separator, and preview it in tattoo-style fonts. Copy the text or download a PNG for your tattoo artist. - **Calculator:** add, subtract, multiply, or divide — type Roman numerals or numbers in either box. - **Practice:** ten quick questions, Number → Roman, Roman → Number, or mixed, from 1–20 up to 1–3999. Your best score is saved on your device. ## Frequently asked questions **How do I convert a number to Roman numerals?** Type the number into the Convert box and the Roman numeral appears instantly — 2026 becomes MMXXVI. Type a Roman numeral instead and it converts back to a number. The breakdown under the result shows how it's built: MM (2000) + XX (20) + VI (6). **How do Roman numerals work?** Seven letters have fixed values: I=1, V=5, X=10, L=50, C=100, D=500, M=1000. You add them left to right (VI = 6). When a smaller value comes before a larger one, you subtract it (IV = 4, IX = 9). I, X, C, and M repeat at most three times in a row. **What is 4 in Roman numerals?** 4 is IV (5 minus 1), and 9 is IX (10 minus 1). The same pattern gives 40 = XL, 90 = XC, 400 = CD, and 900 = CM. Clock faces often show 4 as IIII by tradition, but IV is the standard form. **What is 2026 in Roman numerals?** 2026 is MMXXVI: MM (2000) + XX (20) + VI (6). 2025 is MMXXV and 2000 is MM. **How do I write a date in Roman numerals for a tattoo?** Open the Date tab, enter the day, month, and year, and choose the order — month · day · year (US) or day · month · year. 14 February 2026 becomes II · XIV · MMXXVI or XIV · II · MMXXVI. Preview it in tattoo fonts, then copy it or download a PNG for your artist. **How do you write 1 million in Roman numerals?** One million is M with a bar over it (M̅). A bar, called a vinculum, multiplies a numeral by 1,000 — so V̅ is 5,000 and X̅ is 10,000. The converter writes numbers up to 3,999,999 this way. **Which Roman numerals multiply to 35?** V and VII, because 5 × 7 = 35. Write them as two separate numerals. XXXV is also 35 on its own, and an extra I (1) doesn't change the product. **Why is there no zero in Roman numerals?** The Roman system was made for counting and recording amounts, so it never needed a symbol for zero — or for negative numbers. 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