Convert between numbers and Roman numerals
The Roman Numeral Converter is a free online tool that instantly converts between Arabic numerals and Roman numerals with complete accuracy. Whether you need to translate historical dates, educational assignments, or tattoo designs, this converter handles all conversions effortlessly.
What is the maximum number this converter can handle?
The converter handles Roman numerals up to 3,999 (MMMCMXCIX). Ancient Romans didn't have a symbol for zero or numbers beyond this range in standard notation.
Can I convert decimal or fractional numbers?
No, this tool only converts whole numbers. Roman numerals were designed for integers, so decimal values cannot be accurately represented in traditional Roman numeral format.
Are uppercase and lowercase Roman numerals both accepted?
Yes, the converter accepts both uppercase (IV) and lowercase (iv) Roman numerals and will standardly output in uppercase format.
Why does my Roman numeral show as invalid?
Roman numerals follow specific rules about repetition and placement. Invalid combinations like IIII or IL won't convert. Ensure you're using proper Roman numeral syntax.