Quick Reference
I
1
V
5
X
10
L
50
C
100
D
500
M
1000
IV
4
IX
9
XL
40
XC
90
CD
400
CM
900
MMXXVI
2026
MMMCMXCIX
3999
About Roman Numeral Converter
Convert any decimal number to Roman numerals or translate Roman numeral strings back to decimal numbers. Supports values from 1 to 3,999 following standard Roman numeral rules. Useful for history projects, design, clock faces, and document numbering.
How to Use Roman Numeral Converter
- 1
Choose conversion direction
Select whether you want to convert from decimal to Roman or from Roman to decimal.
- 2
Enter your value
Type the number or Roman numeral string.
- 3
Convert
Click Convert to see the result instantly.
Common Use Cases
- Translating chapter or section numbers in books
- Converting years for film credits or monuments
- Creating numbered lists in Roman numeral style
- Understanding ancient and classical numbering systems
Frequently Asked Questions
What is the maximum number that can be converted?
Does it validate Roman numeral input?
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