Roman Numeral Converter
Convert numbers to Roman numerals or decode Roman numerals back to numbers — instantly.
Number → Roman Numeral
Roman numeral
Roman Numeral → Number
Number
Roman Numeral Reference
I
1
1
IV
4
4
V
5
5
IX
9
9
X
10
10
XL
40
40
L
50
50
XC
90
90
C
100
100
CD
400
400
D
500
500
CM
900
900
M
1000
1000