Roman Numeral Converter
Convert between Roman numerals and Arabic numbers. Free online Roman numeral converter tool.
Arabic Number → Roman Numeral
→Roman numeral
Roman Numeral → Arabic Number
→Arabic number
Common Roman Numerals
1=I
4=IV
5=V
9=IX
10=X
50=L
100=C
500=D
1000=M
2024=MMXXIV
2025=MMXXV
3999=MMMCMXCIX
How to Use This Tool
Enter or paste your content in the input area above. Results update instantly in real-time. All processing happens locally in your browser — your data never leaves your device.