Roman Numeral Converter
ConvertersConvert between Roman numerals and decimal numbers. Free, private — all processing in your browser.
How to use
- 1. Enter or paste your data in the input area above
- 2. Adjust settings or options as needed
- 3. Click the action button or see real-time results
- 4. Copy the result with the copy button
All processing happens in your browser. Nothing is sent to any server.
About this tool
Convert between Roman numerals and decimal numbers in both directions. Enter a decimal number (1-3999) to get the Roman numeral equivalent, or enter Roman numerals (I, V, X, L, C, D, M) to get the decimal value. The tool handles subtractive notation (IV=4, IX=9, XL=40, XC=90, CD=400, CM=900) correctly. Roman numerals are used in clock faces, book chapters, movie sequels, Super Bowl numbering, outline formatting, and formal document numbering. The standard Roman numeral system supports values from 1 to 3,999.
FAQ
▶Is the Roman Numeral Converter free to use?
Yes, completely free. No signup, no premium tiers, no hidden costs.
▶Is my data safe when using the Roman Numeral Converter?
All processing happens in your browser. Your data never leaves your device.
▶Does the Roman Numeral Converter work on mobile?
Yes, fully responsive. Works on smartphones, tablets, and desktops.
▶Do I need to install anything?
No. It runs entirely in your web browser. Just open the page and use it.
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