Roman Numeral Converter
Convert numbers to Roman numerals and back, from 1 to 3999.
The Roman Numeral Converter translates whole numbers between 1 and 3999 into Roman numerals and back. Auto mode detects which direction to use automatically.
Mode
Please enter some input.
How to use
- Choose Auto, To Roman or To Number mode.
- Enter a number or Roman numeral.
- Copy the converted value.
Frequently asked questions
What range is supported?
Numbers from 1 to 3999, which is the largest range expressible with standard Roman numeral notation.
Are lowercase numerals accepted?
Yes, input is case-insensitive and lowercase Roman numerals are converted correctly.
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