Roman Numeral Symbols

Seven letters make every Roman numeral: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500 and M = 1,000. Reading left to right you add the values (VIII = 5 + 1 + 1 + 1 = 8, MDCLXVI = 1,666). The only twist is the subtractive rule: a smaller numeral written in front of a larger one is taken away, and only six such pairs are used: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900. You never write IIII for 4 in standard notation, and never IL for 49 (it is XLIX).

From 1 to 10 that gives I, II, III, IV, V, VI, VII, VIII, IX, X. The tens are X 10, XX 20, XXX 30, XL 40, L 50, LX 60, LXX 70, LXXX 80, XC 90, C 100, and the hundreds follow the same shape: C, CC, CCC, CD, D, DC, DCC, DCCC, CM, M. Put the pieces together from the largest down: 1,999 is MCMXCIX (M + CM + XC + IX), 2,026 is MMXXVI, 1,776 is MDCCLXXVI. Because a numeral can repeat at most three times, the largest number the plain letters can write is MMMCMXCIX, 3,999; anything bigger needs the bar or the large-number forms described further down.

There is no Roman numeral for zero. The Romans counted with these numerals but had no sign for nothing; medieval scribes who needed one wrote the word nulla or just N. There are no negative numbers and no fractions in this system either (Roman fractions were a separate dot-and-S notation based on twelfths), which is one reason Arabic digits replaced Roman numerals for arithmetic across Europe by the end of the Middle Ages.

Ⅻ as one character versus typed XII: what Unicode gives you

Unicode has a dedicated Roman numeral set in its Number Forms block (U+2160 to U+2188): the capitals Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Ⅵ Ⅶ Ⅷ Ⅸ Ⅹ Ⅺ Ⅻ and Ⅼ Ⅽ Ⅾ Ⅿ, and the lowercase ⅰ ⅱ ⅲ ⅳ ⅴ ⅵ ⅶ ⅷ ⅸ ⅹ ⅺ ⅻ and ⅼ ⅽ ⅾ ⅿ. Each one is a single character, so Ⅷ takes one keystroke to delete, cannot break across a line, and stays the same width as Ⅰ in East Asian fonts. These characters came into Unicode 1.1 in 1993 for compatibility with Chinese, Japanese and Korean standards, which numbered things up to twelve; that is why Ⅺ and Ⅻ exist but there is no single-character 13, 14 or 20.

Unicode treats them as compatibility characters: Ⅻ officially decomposes to the letters X I I, so a search for 'XII' usually still finds Ⅻ, and copying text into a plain-ASCII field may silently turn it into XII. Screen readers generally announce them by their Unicode names, so Ⅻ is read as 'Roman numeral twelve' rather than as the letters, which is actually clearer than typed XII for a listener. The downside is fonts: every font has I, V and X, but not every font draws Ⅻ, and a missing glyph shows as a box or falls back to a different typeface. In Western fonts the glyphs are usually serif letters packed tight together; in Japanese and Chinese fonts they sit in a full-width cell.

The rule of thumb: for running text, dates, book chapters and anything that must be edited or searched, type the plain capitals I, V, X, L, C, D and M (they are in this collection too, so you can copy a whole value). Reach for the single-character Ⅰ to Ⅻ when a number has to stay in one piece: a display name on Discord or TikTok, a heading on a poster, a tattoo stencil where VIII must not spread, a spreadsheet cell, or a list where ⅰ ⅱ ⅲ should line up. Instagram and X do not allow them in the handle itself (handles are ASCII only) but they show fine in the display name and bio. The same characters sit in Number Symbols as one row and in Letter Emoji & Alphabet Symbols among the letter styles; this page is the full set.

Big numbers: ↀ ↁ ↂ ↇ ↈ, the apostrophus and the bar for thousands

Before M became the standard sign for a thousand, the Romans wrote it as a C, an I and a reversed C: CIↃ. Half of that shape, IↃ, meant 500 and later smoothed into D. Adding more C and Ↄ around the core multiplied by ten: IↃↃ = 5,000, CCIↃↃ = 10,000, IↃↃↃ = 50,000, CCCIↃↃↃ = 100,000. This 'apostrophus' system survives in Unicode as single characters: ↀ (1,000), ↁ (5,000), ↂ (10,000), ↇ (50,000) and ↈ (100,000), with the reversed C itself encoded as Ↄ and lowercase ↄ. ↀ ↁ ↂ have been in Unicode since 1.1; Ↄ was added in 3.0, ↄ in 5.0, and ↅ ↆ ↇ ↈ in 5.1 (2008). The two odd ones out are ↅ, a late form of six, and ↆ, the early arrow-like form of fifty from which L descends.

The second way to write large numbers is the vinculum: a bar over a numeral multiplies it by 1,000. V̅ = 5,000, X̅ = 10,000, L̅ = 50,000, C̅ = 100,000, D̅ = 500,000 and M̅ = 1,000,000. In Unicode you build these yourself by typing the combining overline U+0305 after each letter: X̅ is X followed by the overline, and 12,000 is X̅I̅I̅ with a bar after every letter. Copy the bar from the grid, paste it right after a letter, and it draws itself over that letter in most apps. A double bar (two overlines) stood for a million times; the medieval convention, not a Roman one.

So if you are looking for the Roman numeral symbol for 5,000 the answer is V̅ or ↁ, for 10,000 it is X̅ or ↂ, and for 1 million it is M̅. Keep in mind the bar forms are two characters each and need a font that places combining marks well, while ↁ ↂ ↇ ↈ are single characters supported by fewer fonts. The one request neither system can satisfy is zero: there is no Roman numeral symbol for it.

Why clocks say IIII, and other places Roman numerals still live

Look at almost any clock face with Roman numerals and four is written IIII, not IV. Clockmakers have kept that habit for centuries, and the usual explanations are visual: IIII balances the heavy VIII on the opposite side of the dial, and the ring reads as three groups of four numerals (I to IIII, V to VIII, IX to XII) instead of mixing IV and VI next to each other. No single origin is proven, which is why the story that a French king ordered it is best treated as legend. The famous exception is Big Ben in London, whose dials use IV. Our Clock & Time Emoji collection has the clock faces themselves; here you can build the ring: Ⅻ Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Ⅵ Ⅶ Ⅷ Ⅸ Ⅹ Ⅺ.

Roman numerals are the numbering of succession and ceremony. Monarchs and popes carry them (Elizabeth II, Charles III, Louis XIV, Pope Leo XIV), as do sequels and events: Rocky Ⅳ, Final Fantasy Ⅶ, the Super Bowl, which has counted in Roman numerals since Super Bowl V except for Super Bowl 50 in 2016, when the NFL judged a lone 'L' too ugly for the logo and used digits for one year. Film and TV credits give the copyright year in Roman numerals (MCMXCIX, MMXXVI), monuments and cornerstones carry their dates in them, and the preliminary pages of a book are numbered in lowercase i, ii, iii so the main text can start at 1.

In writing they still organise outlines (I. II. III. for the top level, then A, B, C, then 1, 2, 3), name chapters and acts, mark centuries in many languages (the French and Spanish write 'siglo XXI'), and number the valves in a trumpet or the strings in a tab. Tattoos of a birth date or wedding date in Roman numerals are a lasting trend; a date like 24 · Ⅹ · 2026 is usually set in plain serif capitals so the artist's stencil matches a printable font, with dots or small gaps between the day, month and year.

How to type Roman numerals in Word, on a Mac and on your phone

The quickest way is to copy them from this page: tap any symbol in the grid, then paste it before copying the next symbol. In Microsoft Word there are two more ways. Type the Unicode code and press Alt+X: 2160 Alt+X turns into Ⅰ, 216B Alt+X into Ⅻ, 216F Alt+X into Ⅿ and 2170 Alt+X into ⅰ. Or open Insert, Symbol, More Symbols and choose the subset Number Forms, where the whole row sits next to the fractions. For page numbers in Roman numerals, do not insert symbols at all: go to Insert, Page Number, Format Page Numbers and pick the number format i, ii, iii or I, II, III; Word then numbers the section for you, and a separate section break lets the preface count in ⅰ ⅱ ⅲ while the body counts in 1 2 3.

On a Mac, open the Character Viewer with Control+Command+Space and search 'roman numeral'; the results include Ⅰ to Ⅻ and the large forms. On iPhone and Android there is no Roman numeral key, so paste from here or add a text replacement (for example 'xii' expanding to Ⅻ) in the keyboard settings. In HTML you can write them as entities by code: Ⅻ is Ⅻ and Ⅰ is Ⅰ. In LaTeX, \Roman{} and \roman{} print counters as uppercase and lowercase Roman numerals, no special characters needed.

If you want Roman numerals as decoration rather than as numbers, the styled letter sets elsewhere on fsymbols do the job: a bold 𝐗𝐈𝐈, a Gothic 𝔛𝔦𝔦 or a double-struck 𝕏𝕀𝕀 from Letter Emoji & Alphabet Symbols, or circled Ⓧ Ⓘ Ⓘ from the circled letters. For the numbers themselves, the single-character Ⅻ and the plain letters above are the two correct answers.