Roman Numeral Converter
Convert between Arabic numbers (1, 2, 3…) and Roman numerals (I, II, III…).
How to Use
- Type in either row; the other updates live.
- Range: 1 – 3999 (standard Roman).
Number
Breakdown
Symbols
I
1
V
5
X
10
L
50
C
100
D / M
500 / 1000
Frequently Asked Questions
Why 3999 max?
Classical Roman has no M > 3 in a row. Vinculum (overline ×1000) extends but isn't universal.
Common Use Cases
Dates
Movie copyright years.
Chapter numbers
Book outlines.
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