Math
Roman Numeral Converter
Privacy Verified
Convert between Roman numerals (I, II, III, IV...) and Arabic numbers (1, 2, 3, 4...) instantly.
🔄 Arabic to Roman
🔄 Roman to Arabic
📚 Quick Reference
1
I
I
4
IV
IV
5
V
V
9
IX
IX
10
X
X
40
XL
XL
50
L
L
90
XC
XC
100
C
C
400
CD
CD
500
D
D
900
CM
CM
1000
M
M
1994
MCMXCIV
MCMXCIV
2024
MMXXIV
MMXXIV
3999
MMMCMXCIX
MMMCMXCIX
Privacy & Security
Converted locally in browser.
Data: None
Client-side-Side
Active
v1.0
About This Tool
This tool runs entirely in your browser. No data is sent to any server, ensuring complete privacy. Simply use the interface above to get started — no registration or login required.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.