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Roman Numeral Converter
Convert between Arabic and Roman numerals.
Free · No signup
Roman Numeral Reference
M
1000
D
500
C
100
L
50
X
10
V
5
I
1
Quick Examples
Conversion Rules
IV= 4 (5-1): I before V means subtract
IX= 9 (10-1): I before X means subtract
XL= 40 (50-10): X before L means subtract
XC= 90 (100-10): X before C means subtract
CD= 400 (500-100): C before D means subtract
CM= 900 (1000-100): C before M means subtract
Roman numerals can only represent numbers from 1 to 3999. For larger numbers, various notation systems exist using bars over letters.
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