Roman Numeral Converter
Easily convert Arabic numbers to Roman numerals or vice versa, by typing standard Arabic numbers into the Arabic numbers column and you immediately get the conversion value of Roman numerals, and vice versa.
How to Use
This Roman numeral converter supports bidirectional conversion between Arabic numbers and Roman numerals, with support for numbers up to 3,999,999.
Step 1: Enter an Arabic number (1-3,999,999) in the left field to see its Roman numeral equivalent.
Step 2: Enter Roman numerals in the right field to see the Arabic number equivalent.
Supported Range: This converter supports numbers from 1 to 3,999,999.
Examples:
Frequently Asked Questions
Have another question? Let us know.
What are Roman numerals?
Roman numerals are a numeral system from ancient Rome that uses combinations of letters (I, V, X, L, C, D, M) to represent values. They rely on additive and subtractive principles instead of place value.
What range of numbers does this converter support?
This converter handles any integer from 1 up to 3,999,999 by using standard Roman numerals for 1–3,999 and overline (vinculum) notation for larger values (×1,000).
How do the overline (vinculum) symbols work?
An overline above a Roman symbol multiplies its value by 1,000. For example, V̅ represents 5,000, X̅ is 10,000, and M̅ equals 1,000,000.
How do I convert a Roman numeral back to an Arabic number?
Just type the Roman numeral (upper- or lower-case, including any overlines) into the Roman input field—your Arabic result will appear instantly in the Arabic input field.
