Roman Numeral Converter
Convert between Roman numerals and Arabic numbers
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How to use this tool · examples & limitations
Convert between Roman numerals and Arabic numbers.
Getting a reliable result
Select the source representation before converting. For example, decimal 255 corresponds to hexadecimal FF and binary 11111111.
Limitations to check
Check character encoding, valid digits and number size. Classical letter ciphers provide no modern confidentiality.
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