Our free Roman Numeral Converter makes it easy to convert numbers into Roman numerals and Roman numerals back into numbers. Whether you need it for a school project, a clock design, or just curiosity about how any date looks in Roman numerals, this tool gives you accurate results instantly.
Roman Numeral Converter
Convert between decimal numbers and Roman numerals seamlessly
Your result will appear here
Did you know?
Roman numerals originated in ancient Rome and were used throughout their empire, becoming the standard numbering system in Europe for over a millennium.
There is no zero in Roman numerals. The concept of zero arrived in Europe much later through Arabic mathematics.
The largest number that can be represented in standard Roman numeral notation is 3,999 (MMMCMXCIX).
Conversion History
What is a Roman Numeral Converter?
Roman numerals are an ancient number system where letters represent numbers. For example:
- 1 = I
- 4 = IV
- 9 = IX
- 50 = L
- 100 = C
- 1000 = M
This tool allows you to:
- Convert numbers to Roman numerals (e.g., 1999 → MCMXCIX)
- Convert Roman numerals to numbers (e.g., XLV → 45)
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Why Use Our Roman Numeral Converter?
- Works both ways: numbers ↔ Roman numerals
- Instant, accurate results
- Helpful for students, teachers, and history enthusiasts
- Great for converting dates, years, outlines, or exam answers
How to Use the Converter
- Enter a number (e.g., 2025) or Roman numeral (e.g., MMXXV).
- Click Convert.
- Get the result instantly.
Example:
- Input 2025 → Output: MMXXV
- Input XLII → Output: 42
Where Are Roman Numerals Still Used?
Roman numerals remain relevant in modern life:
- Book chapters and outlines (Chapter XII)
- Clocks and watches (III, VI, IX, XII)
- Movie titles and sporting events (Super Bowl LVIII)
- School and university materials
- Historical dates and monuments
Roman Numeral Conversion Examples
- 7 → VII
- 44 → XLIV
- 99 → XCIX
- 2024 → MMXXIV
- 3999 → MMMCMXCIX (largest standard Roman numeral)
Roman Numeral Chart (1–100)
| Number | Roman | Number | Roman | Number | Roman | Number | Roman |
|---|---|---|---|---|---|---|---|
| 1 | I | 26 | XXVI | 51 | LI | 76 | LXXVI |
| 2 | II | 27 | XXVII | 52 | LII | 77 | LXXVII |
| 3 | III | 28 | XXVIII | 53 | LIII | 78 | LXXVIII |
| 4 | IV | 29 | XXIX | 54 | LIV | 79 | LXXIX |
| 5 | V | 30 | XXX | 55 | LV | 80 | LXXX |
| 10 | X | 35 | XXXV | 60 | LX | 85 | LXXXV |
| 20 | XX | 40 | XL | 70 | LXX | 90 | XC |
| 25 | XXV | 50 | L | 75 | LXXV | 100 | C |
(Tip: You can expand the full 1–100 chart for SEO strength.)
Frequently Asked Questions
1. Can I convert both numbers and Roman numerals with this tool?
Yes, this converter works both ways — numbers to Roman numerals and Roman numerals back to numbers.
2. What is the maximum number supported?
The largest standard Roman numeral is 3,999 (MMMCMXCIX).
3. Are Roman numerals still used today?
Yes, they appear on clocks, outlines, movies, and in historical references.
4. Do students still need to learn Roman numerals?
Yes, many school systems include them as part of mathematics and history lessons.
Try the Roman Numeral Converter Now
Enter any number or Roman numeral above and see the instant conversion. Whether for school, work, or just curiosity, our Roman Numeral Converter is accurate, easy, and free to use.