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Roman Numeral Converter

Convert between Arabic numbers and Roman numerals. Supports 1 to 3,999,999 with overline notation.

100% Free Works in Browser Instant

Arabic → Roman

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Roman → Arabic

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Quick Reference

1 I

4 IV

5 V

9 IX

10 X

40 XL

50 L

90 XC

100 C

400 CD

500 D

900 CM

1000 M

4000 MV̄

5000 V̄

10000 X̄