Roman Numeral Converter
Convert between Roman numerals and Arabic numbers seamlessly. Perfect for historical dates, clock faces, and classic numbering. Enable Practice Mode to test your knowledge in both directions!
IVXL
CDM
ARABIC NUMBER TO ROMAN
Settings
الحد الأقصى: ٣٩٩٩
Roman Numeral Result
MMXXIV
ROMAN NUMERAL TO ARABIC
Settings
Case sensitive
Arabic Number Result
٢٠٢٤
Did you know?
Roman numerals originated in ancient Rome and remained the
usual way of writing numbers throughout Europe well into the
Late Middle Ages. They are still used today for special
purposes like clock faces, book chapters, and movie credits.
Practice Mode
Enable practice mode to test your knowledge of Roman numerals.
Practice both directions: Arabic → Roman and Roman → Arabic.
Track your progress with separate scores for each mode!
Enable practice mode
Roman Numeral Reference
Common Numbers:
How to Use This Tool
- Enter Eastern Arabic numerals (٠-٩) or Roman letters
- Click conversion buttons or press Enter
- Use common numbers for quick conversions
- Enable Practice Mode to test both directions
- Automatically validates your input
- Switch between conversion directions easily
Examples
- MMXXIV = 2024
- XCIX = 99
- MDCCLXXVI = 1776
- MCMXC = 1990
How to Convert Roman Numerals
- For Arabic → Roman: Enter a number (1-3999) in the left card
- For Roman → Arabic: Enter Roman letters (e.g., MMXXIV) in the right card
- Click the conversion button or press Enter
- Copy the result with one click
- Use Practice Mode to test your knowledge
Enable "Extended range" for numbers up to 3,999,999 (using vinculum).
Understanding Roman Numerals
- I = 1, V = 5, X = 10, L = 50
- C = 100, D = 500, M = 1000
- Subtraction rule: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900
- No zero: Romans had no symbol for zero
- Vinculum: A bar above multiplies by 1000 (e.g., V̄ = 5000)
Roman numerals are still used in clocks, book chapters, and movie credits.
Frequently Asked Questions
Is this Roman numeral converter free?
Yes, completely free! No hidden costs, no registration. Convert
unlimited numbers instantly.
Is my data stored?
No. All conversions happen locally in your browser. We do not
store or upload any numbers you enter. Your privacy is fully
protected.
What is the maximum number supported?
Standard mode supports 1-3999 (MMMCMXCIX). Enable "Extended range"
for numbers up to 3,999,999 using the vinculum notation (a bar
over letters multiplies by 1000).
What is the subtraction rule?
When a smaller numeral appears before a larger one, it is
subtracted (e.g., IV = 4, IX = 9). This avoids four repeated
characters (IIII is written as IV).
Why are there no zeros in Roman numerals?
The Roman numeral system was designed for counting and commerce,
not mathematics. The concept of zero as a placeholder came later
from Arabic/Indian mathematics.
How does the practice mode work?
Practice mode generates random numbers for you to convert. Track
your score and streak for both directions. It's a great way to
learn Roman numerals!
Practice Challenges
Arabic → Roman
0/0
0
Roman → Arabic
0/0
0
Convert to Roman numeral:
٢٠٢٤