Roman Numeral Converter
Roman Numerals Table
Roman Numeral Converter Tool
The Roman Numeral Converter is a simple, fast, and accurate tool to convert numbers between the Roman numeral system (I, V, X, L, C, D, M) and the decimal number system (1, 2, 3...). It's ideal for students, historians, teachers, or anyone working with classical numbering systems.
Whether you're converting 2025 to MMXXV or turning XLII into 42, this converter handles both directions instantly. No need to remember Roman numeral rules — just input your number and get results immediately.
Features:
- Supports conversion from Roman to decimal and decimal to Roman
- Handles numbers from 1 to 3999
- Instant conversion with error detection
- Mobile-friendly and works in all browsers
What are Roman Numerals?
Roman numerals are a numeral system originating from ancient Rome, using combinations of letters from the Latin alphabet: I, V, X, L, C, D, and M. They are still used today in clocks, book chapters, movie sequels, and formal writings.
Frequently Asked Questions (FAQ)
What is a Roman Numeral Converter?
It's a tool that helps you convert between Roman numerals (like X, L, M) and standard Arabic numbers (like 10, 50, 1000), useful for historical references, clock faces, and academic purposes.
What is the range of numbers supported?
The converter supports numbers between 1 and 3999, which is the conventional range for Roman numerals based on classical rules.
Does the tool accept lowercase Roman letters?
Yes. The tool recognizes both uppercase and lowercase input. For instance, "xiv" and "XIV" will both return the number 14.
Is the converter free to use?
Absolutely. This tool is completely free, works directly in your browser, and requires no registration or installation.