Use our Roman Numeral Converter to instantly convert numbers, dates, and years into Roman numerals—and reverse them back into numbers with ease. Whether you’re working on a school project, designing a Roman numeral tattoo, or checking numerals for a clock face, this tool makes it simple.
👉 Convert Arabic numbers to Roman numerals (1–3,999)
👉 Translate dates for tattoos or special occasions
👉 Reverse Roman numerals back to numbers instantly
Roman Numeral Converter Tool
What Are Roman Numerals?
Roman numerals are an ancient numeral system that originated in Ancient Rome and remained in use throughout Europe until the late Middle Ages. Instead of digits like 0–9, they use letters from the Latin alphabet to represent numbers.
| Roman Symbol | Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1,000 |
For example, X represents 10, while IX means 9 (10 – 1). Even today, Roman numerals are common on clock faces, book chapters, movie sequels, Super Bowls, and tattoos.
For a deeper dive into the history of numeral systems, check out Britannica’s overview.
How to Read and Write Roman Numerals
Basic Rules
- Addition Rule: If a smaller numeral comes after a larger numeral, add them.
Example: VI = 5 + 1 = 6 - Subtraction Rule: If a smaller numeral comes before a larger numeral, subtract it.
Example: IV = 5 – 1 = 4 - No Repeats Rule: The same symbol cannot be repeated more than three times in a row.
Example: III = 3, but 4 is IV, not IIII.
For an expanded guide with additional examples, explore the Roman Numerals Guide on Wolfram MathWorld.
Large Numbers (Over 3,999)
For numbers larger than 3,999, a vinculum (a line placed above a numeral) multiplies its value by 1,000.
- V̅ = 5,000
- X̅ = 10,000
Learn more about how vinculums work.
How to Use Our Roman Numeral Converter Tool
Our tool features three convenient conversion modes:
1. Date Converter
Convert special dates (like birthdays or anniversaries) into Roman numerals—ideal for tattoos, engraved jewelry, or wedding invitations.
2. Number Converter
Instantly convert any number from 1 to 3,999 into Roman numerals.
3. Reverse Converter
Quickly translate Roman numerals back into Arabic numbers.
Key Features
✅ Supports custom date formats (MM.DD.YYYY, DD.MM.YYYY, YYYY.MM.DD)
✅ Choose your favorite delimiter: dot, slash, dash, and more
✅ Easy copy & reset buttons
✅ Fully responsive and mobile-friendly
Why Use Our Roman Numeral Converter?
✅ Easy-to-use interface
✅ Accurate conversions
✅ Works for both numbers and dates
✅ 100% free—no sign-up required
✅ Great for tattoos, watches, clocks, and more!
If you’re curious about Roman numerals on clocks, check out the history behind their usage.
Roman Numerals Chart (1–100)
Here’s a quick reference chart for numbers 1 to 100 and their construction:
| Number | Roman Numeral | Construction |
|---|---|---|
| 0 | Roman numerals do not have a symbol for zero | |
| 1 | I | 1 |
| 2 | II | 1+1 |
| 3 | III | 1+1+1 |
| 4 | IV | 5-1 |
| 5 | V | 5 |
| 6 | VI | 5+1 |
| 7 | VII | 5+1+1 |
| 8 | VIII | 5+1+1+1 |
| 9 | IX | 10-1 |
| 10 | X | 10 |
| 11 | XI | 10+1 |
| 12 | XII | 10+1+1 |
| 13 | XIII | 10+1+1+1 |
| 14 | XIV | 10-1+5 |
| 15 | XV | 10+5 |
| 16 | XVI | 10+5+1 |
| 17 | XVII | 10+5+1+1 |
| 18 | XVIII | 10+5+1+1+1 |
| 19 | XIX | 10-1+10 |
| 20 | XX | 10+10 |
| 21 | XXI | 10+10+1 |
| 22 | XXII | 10+10+1+1 |
| 23 | XXIII | 10+10+1+1+1 |
| 24 | XXIV | 10+10-1+5 |
| 25 | XXV | 10+10+5 |
| 26 | XXVI | 10+10+5+1 |
| 27 | XXVII | 10+10+5+1+1 |
| 28 | XXVIII | 10+10+5+1+1+1 |
| 29 | XXIX | 10+10-1+10 |
| 30 | XXX | 10+10+10 |
| 31 | XXXI | 10+10+10+1 |
| 32 | XXXII | 10+10+10+1+1 |
| 33 | XXXIII | 10+10+10+1+1+1 |
| 34 | XXXIV | 10+10+10-1+5 |
| 35 | XXXV | 10+10+10+5 |
| 36 | XXXVI | 10+10+10+5+1 |
| 37 | XXXVII | 10+10+10+5+1+1 |
| 38 | XXXVIII | 10+10+10+5+1+1+1 |
| 39 | XXXIX | 10+10+10-1+10 |
| 40 | XL | 50-10 |
| 41 | XLI | 50-10+1 |
| 42 | XLII | 50-10+1+1 |
| 43 | XLIII | 50-10+1+1+1 |
| 44 | XLIV | 50-10-1+5 |
| 45 | XLV | 50-10+5 |
| 46 | XLVI | 50-10+5+1 |
| 47 | XLVII | 50-10+5+1+1 |
| 48 | XLVIII | 50-10+5+1+1+1 |
| 49 | XLIX | 50-10-1+10 |
| 50 | L | 50 |
| 51 | LI | 50+1 |
| 52 | LII | 50+1+1 |
| 53 | LIII | 50+1+1+1 |
| 54 | LIV | 50-1+5 |
| 55 | LV | 50+5 |
| 56 | LVI | 50+5+1 |
| 57 | LVII | 50+5+1+1 |
| 58 | LVIII | 50+5+1+1+1 |
| 59 | LIX | 50-1+10 |
| 60 | LX | 50+10 |
| 61 | LXI | 50+10+1 |
| 62 | LXII | 50+10+1+1 |
| 63 | LXIII | 50+10+1+1+1 |
| 64 | LXIV | 50+10-1+5 |
| 65 | LXV | 50+10+5 |
| 66 | LXVI | 50+10+5+1 |
| 67 | LXVII | 50+10+5+1+1 |
| 68 | LXVIII | 50+10+5+1+1+1 |
| 69 | LXIX | 50+10-1+10 |
| 70 | LXX | 50+10+10 |
| 71 | LXXI | 50+10+10+1 |
| 72 | LXXII | 50+10+10+1+1 |
| 73 | LXXIII | 50+10+10+1+1+1 |
| 74 | LXXIV | 50+10+10-1+5 |
| 75 | LXXV | 50+10+10+5 |
| 76 | LXXVI | 50+10+10+5+1 |
| 77 | LXXVII | 50+10+10+5+1+1 |
| 78 | LXXVIII | 50+10+10+5+1+1+1 |
| 79 | LXXIX | 50+10+10-1+10 |
| 80 | LXXX | 50+10+10+10 |
| 81 | LXXXI | 50+10+10+10+1 |
| 82 | LXXXII | 50+10+10+10+1+1 |
| 83 | LXXXIII | 50+10+10+10+1+1+1 |
| 84 | LXXXIV | 50+10+10+10-1+5 |
| 85 | LXXXV | 50+10+10+10+5 |
| 86 | LXXXVI | 50+10+10+10+5+1 |
| 87 | LXXXVII | 50+10+10+10+5+1+1 |
| 88 | LXXXVIII | 50+10+10+10+5+1+1+1 |
| 89 | LXXXIX | 50+10+10+10-1+10 |
| 90 | XC | 100-10 |
| 91 | XCI | 100-10+1 |
| 92 | XCII | 100-10+1+1 |
| 93 | XCIII | 100-10+1+1+1 |
| 94 | XCIV | 100-10-1+5 |
| 95 | XCV | 100-10+5 |
| 96 | XCVI | 100-10+5+1 |
| 97 | XCVII | 100-10+5+1+1 |
| 98 | XCVIII | 100-10+5+1+1+1 |
| 99 | XCIX | 100-10-1+10 |
| 100 | C | 100 |
Roman Numerals for Dates
Perfect for tattoos, engravings, and special occasions, Roman numerals give dates a timeless feel.
For example:
March 4, 2025, in YYYY.MM.DD format becomes MMXXV.III.IV.
Choose your delimiter style—dots, dashes, or slashes—for a personalized look. Explore Pinterest’s Roman numeral tattoo ideas for inspiration.
Frequently Asked Questions
What is a Roman Numeral Converter?
A Roman Numeral Converter translates numbers or dates into Roman numeral format, and vice versa.
What’s the largest number this converter can handle?
Our converter supports up to 3,999, using traditional Roman numerals. For numbers beyond, check out Wolfram’s explanation on large Roman numerals.
How do you write numbers larger than 3,999?
How do you convert Roman numerals to numbers?
Use the Reverse Converter. Type in the Roman numeral (like “MMXXV”) and the converter will give you the number (2025).
How do you convert a date into Roman numerals?
Use our Date Converter. Enter the day, month, and year, choose the format and delimiter, and get your Roman numeral date instantly.
What’s the best format for tattoos?
Popular formats include:
YYYY.MM.DD➡️MM.XII.XXVMM/DD/YYYY➡️XII/XXV/MM
Perfect for wedding dates or birthdays.