Roman Numerals Converter

Translate numbers to Roman numerals and Roman to Arabic instantly with this free online converter. Accurate, easy to use, and perfect for students, historians, and designers.

Arabic to Roman
Roman to Arabic
Arabic Number:
Numbers above 3999 use overline notation (not displayed)
Roman Numeral:
Large numbers use overline notation (represented with _ prefix)
Enter a number or Roman numeral to see the conversion
Batch Conversion
Roman Numeral Symbols
I= 1
V= 5
X= 10
L= 50
C= 100
D= 500
M= 1,000
_V= 5,000
_X= 10,000
_L= 50,000
_C= 100,000
_D= 500,000
_M= 1,000,000
Conversion Rules
The basic symbols are: I(1), V(5), X(10), L(50), C(100), D(500), M(1000)
A symbol placed after another of equal or greater value adds (VI = 6)
A symbol placed before one of greater value subtracts (IV = 4)
Same symbols cannot be repeated more than 3 times in a row (XXX = 30, but 40 = XL)
Numbers above 3,999 use overline notation (represented with underscore prefix here)
Conversion Examples
14 = XIV
79 = LXXIX
225 = CCXXV
845 = DCCCXLV
2023 = MMXXIII