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Roman Numerals
Convert between Roman and Arabic numbers
Math
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Number → Roman
Roman → Number
Arabic Number (1–3999)
REFERENCE
I
1
V
5
X
10
L
50
C
100
D
500
M
1000
IV
4
IX
9
XL
40
XC
90
CD
400
CM
900
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Guide & FAQ
What are Roman numerals?
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How does subtraction work in Roman numerals?
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What is the largest standard Roman numeral?
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Where are Roman numerals used today?
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