Convert numbers to Roman numerals, translate Roman numerals back to decimal, convert dates and birthdays, and explore the full Roman numeral chart — all in one free tool.
Popular for tattoos, jewelry & anniversary gifts.
Three simple steps to convert any number, date, or birthday instantly.
Select Number → Roman, Roman → Number, Date Converter, Birthday, Translator, or Chart from the tab bar at the top of the tool.
Type a number (1–3999), a Roman numeral string, or pick a date from the date picker. The tool validates your input instantly as you type.
Copy your Roman numeral result with one click. For birthdays, use the Share button to generate a shareable message — perfect for social media and tattoo references.
Commonly searched Roman numeral conversions at a glance.
The seven core symbols that make up every Roman numeral.
When symbols are written from largest to smallest (left to right), their values are added together.
| Roman | Calculation | Value |
|---|---|---|
| VI | 5 + 1 | 6 |
| XV | 10 + 5 | 15 |
| LX | 50 + 10 | 60 |
| DC | 500 + 100 | 600 |
| MMI | 1000 + 1000 + 1 | 2001 |
When a smaller symbol appears before a larger one, it is subtracted. Only six subtractive pairs exist.
| Roman | Calculation | Value |
|---|---|---|
| IV | 5 − 1 | 4 |
| IX | 10 − 1 | 9 |
| XL | 50 − 10 | 40 |
| XC | 100 − 10 | 90 |
| CD | 500 − 100 | 400 |
| CM | 1000 − 100 | 900 |
Roman numerals remain in everyday use across many fields and traditions.
Converting a birth date or anniversary into Roman numerals is extremely popular for tattoos and personalised jewellery. Enter your birthday in the Birthday tab above to get your date instantly.
Copyright notices, movie release years, Olympic Games, and university founding dates commonly use Roman numerals. For example, the 2024 Paris Olympics used MMXXIV and 2025 appears as MMXXV.
Many analogue clock faces use Roman numerals for hour markers. Notably, clock faces often use IIII instead of IV for aesthetic balance — one of the rare exceptions to the subtractive rule.
Preface and introduction pages in books are numbered with lowercase Roman numerals (i, ii, iii, iv) to distinguish them from main content. Legal and government documents also use Roman numerals for section numbering.
Building cornerstones, memorials, and government buildings frequently display construction years in Roman numerals. The US Capitol cornerstone reads MDCCXCIII (1793).
Film and television productions traditionally display copyright years in Roman numerals in their end credits. Super Bowl and other major sporting events use Roman numerals for their edition numbers (e.g. Super Bowl LVIII).
Everything you need to know about Roman numeral conversion.
90 in Roman numerals is XC. This uses subtractive notation: X (10) is placed before C (100), meaning 100 minus 10 equals 90. XC is the standard and only correct way to write 90 in Roman numerals. You will find XC in numbers like XCI (91), XCII (92), up to XCIX (99), and as a component of larger numbers like MCMXCIX (1999).
400 in Roman numerals is CD. C (100) is placed before D (500), so 500 minus 100 equals 400. CD is the correct subtractive form. Writing CCCC would be incorrect, as no symbol may be repeated more than three times in a row under standard Roman numeral rules. CD appears in numbers from 400 to 499, such as CDXLVII (447) and CDXCIX (499).
900 in Roman numerals is CM. C (100) placed before M (1000) means 1000 minus 100 equals 900. CM is the correct and only accepted form. DCCCC would be incorrect because D (500) followed by four C symbols exceeds the three-repeat rule. CM is found in many common year conversions, including 1900 (MCM), 1999 (MCMXCIX), and 2900 (MMCM).
999 in Roman numerals is CMXCIX. This breaks down as: CM (900) + XC (90) + IX (9) = 999. Each component uses subtractive notation: CM = 1000 − 100, XC = 100 − 10, IX = 10 − 1. CMXCIX is one of the more complex Roman numerals because it uses three separate subtractive pairs in a single number.
3999 in Roman numerals is MMMCMXCIX. Breaking it down: MMM (3000) + CM (900) + XC (90) + IX (9) = 3999. This is the largest number expressible in standard Roman numerals. Because M can only be written three times consecutively, numbers 4000 and above require an overline notation (a bar above the symbol multiplies its value by 1000), which is outside the scope of standard usage.
MMXXV means 2025 in numbers. Breaking it down: MM = 2000 (two M symbols, each worth 1000), XX = 20 (two X symbols, each worth 10), V = 5. Adding: 2000 + 20 + 5 = 2025. MMXXV is the Roman numeral for the year 2025, widely used in New Year graphics, copyright notices, academic documents, and year labels on official government materials.
MCMXCIX means 1999 in numbers. The breakdown is: M (1000) + CM (900) + XC (90) + IX (9) = 1999. This was one of the most-searched Roman numerals during the late 1990s and year 2000 transition. It uses three subtractive pairs: CM, XC, and IX — making it one of the most notation-efficient Roman numerals for a 4-digit number.
Dates in Roman numerals are written by converting the day, month, and year separately, then separating them with a slash or dot. The most common format is Day/Month/Year. For example, June 10, 2026 becomes X/VI/MMXXVI. The day is X (10), the month is VI (6), and the year is MMXXVI (2026). Use the Date Converter tab in the tool above to convert any date instantly.
To convert your birthday to Roman numerals, use the Birthday tab in the tool above. Enter your birth date using the date picker, and the result is shown immediately in Day/Month/Year format. For example, March 15, 1990 becomes XV/III/MCMXC. This format is extremely popular for Roman numeral tattoos, personalised jewellery, wedding gifts, and memorial stones. The Birthday tab also includes a Share button for social media use.
The largest number in standard Roman numerals is 3999, written as MMMCMXCIX. This is because the symbol M (1000) can only be written three times consecutively in standard notation. To represent 4000 and above, ancient Romans used a vinculum — a horizontal bar above a symbol that multiplies its value by 1,000. However, this extended notation is not part of the modern standard and is rarely used today.
XC means 90 in Roman numerals. X (10) placed before C (100) uses subtractive notation: 100 minus 10 equals 90. XC forms the base of all numbers from 90 to 99 (XCI through XCIX). It also appears inside larger Roman numerals such as MCMXCIX (1999), MMXCII (2092), and MCMXCI (1991). XC is one of the six standard subtractive pairs in the Roman numeral system.
2025 in Roman numerals is MMXXV. The breakdown is: MM = 2000 (two thousands), XX = 20 (two tens), V = 5. MMXXV is the year 2025. It appears on coin reverses, copyright footers, academic graduation certificates, and New Year design materials published in that year. The year 2025 is the most commonly searched Roman numeral year as of current usage.
2024 in Roman numerals is MMXXIV. Breaking it down: MM = 2000, XX = 20, IV = 4 (subtractive pair: 5 minus 1). Total: 2000 + 20 + 4 = 2024. MMXXIV was widely used on 2024 Olympic merchandise (Paris Games), institutional publications, and official government documents for that year. The subtractive pair IV is what distinguishes 2024 from 2025 (MMXXV).
1984 in Roman numerals is MCMLXXXIV. The breakdown: M (1000) + CM (900) + LXXX (80) + IV (4) = 1984. LXXX is written as L (50) + X (10) + X (10) + X (10). MCMLXXXIV is notable as the birth year of many millennials who search for their birth year in Roman numerals, and is also the title year of George Orwell's famous novel "Nineteen Eighty-Four".
The seven basic Roman numeral symbols are: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. Every Roman numeral from 1 to 3999 can be constructed using only these seven symbols combined with additive and subtractive notation rules. The letters derive from ancient Roman and Etruscan origins: I from a finger, V from an open hand, X from two V shapes, and M from the Latin mille (thousand).
Four is written as IV because of the subtractive notation rule: a smaller symbol placed before a larger one is subtracted from it. I (1) before V (5) means 5 − 1 = 4. This rule prevents any symbol from repeating more than three times in a row. IIII was historically used — it still appears on many clock faces and in some ancient manuscripts — but IV has been the accepted written standard for over a thousand years and is the form used in all modern contexts.
XL in Roman numerals equals 40. X (10) placed before L (50) means 50 minus 10 equals 40. XL is one of the six standard subtractive pairs. Numbers from 40 to 49 are written as XLI (41), XLII (42), XLIII (43), XLIV (44), XLV (45), XLVI (46), XLVII (47), XLVIII (48), and XLIX (49). XL also appears in larger numbers such as MCMXLV (1945) and MMXLVIII (2048).
CD in Roman numerals equals 400. C (100) placed before D (500) means 500 minus 100 equals 400. CD is the subtractive pair used for all numbers between 400 and 499. For example, CDL = 450, CDXC = 490, and CDXCIX = 499. CD also appears in year conversions such as MCDXCII (1492, the year Columbus arrived in the Americas).
CM in Roman numerals equals 900. C (100) placed before M (1000) means 1000 minus 100 equals 900. CM is the largest subtractive pair in the standard Roman numeral system. It forms the basis for all numbers between 900 and 999. Significant numbers containing CM include: MCMXCIX (1999), MCM (1900), MCMLXXXIV (1984), and MMMCMXCIX (3999).
No. Roman numerals cannot represent zero or negative numbers. The Roman numeral system has no symbol for zero, which is one of its major limitations compared to the Hindu-Arabic system. This is one reason why Roman numerals were gradually replaced for everyday arithmetic and mathematics after the introduction of the zero concept to Europe via Arabic translations of Indian mathematical texts around the 12th century.
2026 in Roman numerals is MMXXVI. The breakdown: MM = 2000, XX = 20, VI = 6 (V = 5 plus I = 1). Total: 2000 + 20 + 6 = 2026. MMXXVI is the current year as of 2026 and is commonly used in copyright footers, film and documentary credits, academic publications, and commemorative materials released this year.
MMXXVI in numbers is 2026. Reading each symbol: MM = 1000 + 1000 = 2000, XX = 10 + 10 = 20, VI = 5 + 1 = 6. Grand total: 2026. Since all symbols decrease in value from left to right, this is purely additive — no subtractive notation is needed. MMXXVI is the Roman numeral year for 2026.
Years are written in Roman numerals by converting the full four-digit number. Years from 1000 to 1999 begin with M or MC (for 1900s, MCM). Years from 2000 onwards begin with MM. Examples: 2023 = MMXXIII, 2024 = MMXXIV, 2025 = MMXXV, 2026 = MMXXVI. For years in the 1900s: 1900 = MCM, 1984 = MCMLXXXIV, 1999 = MCMXCIX. Use the Number → Roman tab above to convert any year between 1 and 3999.
1000 in Roman numerals is M. The symbol M is derived from the Latin word mille, meaning thousand. M is the largest single Roman numeral symbol in standard notation. It can appear up to three times consecutively (MMM = 3000). Numbers like 2000 are MM, 3000 are MMM. M is also used as a suffix in words like millennium (1000 years) and millimetre (one thousandth of a metre).
Today's date (June 10, 2026) in Roman numerals is X/VI/MMXXVI. The day 10 = X, the month June (6) = VI, and the year 2026 = MMXXVI. The Date Converter tab in the tool above dynamically shows today's Roman numeral date and lets you convert any other date you choose.
The Toolsvy Roman Numeral Converter is a free, browser-based tool that handles every aspect of Roman numeral conversion on a single page. It converts integers from 1 to 3,999 to Roman numerals in real time, translates any valid Roman numeral string back to its decimal equivalent with a step-by-step explanation, and converts full calendar dates and birth dates into the Day/Month/Year Roman numeral format used for tattoos, jewellery, and anniversary gifts.
The tool includes a complete Roman numeral chart for ranges 1–100, 1–500, and 1–1000, a reference table for additive and subtractive notation, and 25 frequently asked questions covering the most-searched Roman numeral conversions including 90 (XC), 400 (CD), 900 (CM), 999 (CMXCIX), 1984 (MCMLXXXIV), 2025 (MMXXV), 2026 (MMXXVI), and 3999 (MMMCMXCIX). Built by Bilal at Toolsvy — no sign-up, no ads, no limits.
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