Roman Numeral Converter
Convert between numbers and Roman numerals in both directions.
Results are provided for general informational use. Verify important financial, health or legal figures before relying on them.
About this Roman Numeral Converter
The Roman Numeral Converter changes a whole number between 1 and 3999 into its Roman numeral form, and can also read a Roman numeral back into a regular number.
For related tasks, try Number Base Converter, Prime Number Checker or GCD Calculator.
How the calculation works
Standard Roman numeral symbols (I, V, X, L, C, D, M) are combined using addition and subtraction rules, where a smaller symbol before a larger one is subtracted.
How to use it
- Enter a number from 1 to 3999, or a Roman numeral.
- Select Number to Roman or Roman to Number.
- Review the converted value.
Practical example
The number 1994 converts to MCMXCIV. The Roman numeral XL converts to 40.
Frequently asked questions
What is the largest number supported?
Standard Roman numerals typically cover 1 to 3999 without special notation.
Are lowercase Roman numerals accepted?
Yes, input is not case-sensitive.
Can it convert zero or negative numbers?
No. Classical Roman numerals have no symbol for zero or negative values.
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