Free Roman Numeral Converter Online 2026
Instantly convert any number to Roman numerals or decode Roman numerals to numbers. Perfect for tattoos, dates, movie credits, clock faces, Super Bowl numbers & more. Supports up to 3,999,999.
Common Years in Roman Numerals
Click any year chip to auto-populate the converter above.
Roman Numeral Chart โ Complete Reference
Basic Symbols
| Roman | Value | Notes |
|---|---|---|
| I | 1 | One |
| V | 5 | Five |
| X | 10 | Ten |
| L | 50 | Fifty |
| C | 100 | Centum |
| D | 500 | Quingenti |
| M | 1,000 | Mille |
Subtractive Pairs
| Roman | Value | = Calculation |
|---|---|---|
| IV | 4 | 5 โ 1 |
| IX | 9 | 10 โ 1 |
| XL | 40 | 50 โ 10 |
| XC | 90 | 100 โ 10 |
| CD | 400 | 500 โ 100 |
| CM | 900 | 1000 โ 100 |
Numbers 1โ30 Quick Chart
Roman Numeral Quiz โ Test Your Knowledge
What Are Roman Numerals? Complete Guide with Examples
Roman numerals are a numeral system originating in ancient Rome, using combinations of letters from the Latin alphabet โ I, V, X, L, C, D, and M โ to represent numbers. They were the standard writing system for numbers in Europe throughout the Middle Ages, and remain in widespread use today for clocks, Super Bowl numbers, movie sequels, Olympic Games, copyright dates, chapter headings, and tattoos.
The Seven Core Roman Numeral Symbols
The entire Roman numeral system is built from just seven symbols: I (1), V (5), X (10), L (50), C (100), D (500), and M (1,000). Every number from 1 to 3,999 can be expressed using combinations of these seven letters following specific rules about repetition and subtraction.
How to Convert a Number to Roman Numerals โ Step by Step
Converting any number to Roman numerals uses a greedy subtraction algorithm. Start with the largest Roman value (M = 1000) and work down to the smallest (I = 1):
2026 รท M(1000) โ 2 times โ MM, remainder 26
26 รท X(10) โ 2 times โ XX, remainder 6
6 รท V(5) โ 1 time โ V, remainder 1
1 รท I(1) โ 1 time โ I, remainder 0
Result: MMXXVI
The Subtractive Notation Rule
Roman numerals use six specific subtractive pairs to avoid repeating a symbol more than three times. These are: IV (4), IX (9), XL (40), XC (90), CD (400), CM (900). Only the combinations shown above are valid โ you cannot write IC for 99 (use XCIX) or VX for 5 (use V). This rule creates unambiguous representations for all numbers.
Roman Numerals in Modern Life
Today, Roman numerals appear in many contexts familiar to people across the United States, United Kingdom, Canada, Australia, Germany, and France. The Super Bowl is numbered in Roman numerals (e.g., Super Bowl LVII = 57). Movie sequels and series use them (Rocky II, Star Wars Episode IV). Clock faces traditionally show hours in Roman numerals from I to XII. Wedding anniversaries, building cornerstones, and legal documents use Roman numeral dates for a sense of formality and timelessness.
Tattoo Date Converter โ Roman Numeral Dates
One of the most popular uses for Roman numeral conversion in 2026 is tattoos. Many people choose to memorialize a birth date, wedding anniversary, or significant life event by having the date written in Roman numerals. For example, the date February 14, 2000 becomes XIV ยท II ยท MM. Our free date converter tool above lets you enter any date and instantly see the Roman numeral equivalent with your choice of separator โ dot, dash, slash, or space โ ready to copy and share with your tattoo artist.
Who Uses a Roman Numeral Converter?
Students learning history, Latin, or classical studies use Roman numeral converters for assignments. Sports fans decipher Super Bowl and Olympic Games numbers. Movie and TV enthusiasts decode copyright dates in film credits. Tattoo clients worldwide โ especially in the US, UK, Australia, Canada, and Germany โ rely on accurate date conversions before permanent ink. Clock collectors, architects, and engravers use these conversions for inscriptions and numbering.