Roman Numeral Converter
Convert between Roman numerals and Arabic numbers. Learn Roman numeral rules and see step-by-step conversions. Supports numbers from 1 to 3,999.
Convert between Roman numerals and Arabic numbers. Learn how Roman numerals work with step-by-step explanations. Supports numbers from 1 to 3,999. All processing happens in your browser — completely private.
Roman Numeral Rules
• Smaller before larger = subtract (IV = 4, IX = 9)
• Smaller after larger = add (VI = 6, XI = 11)
How to Use
- Choose conversion direction (Number to Roman or vice versa)
- Enter your value
- See the converted result instantly
- Click examples for quick conversion
Frequently Asked Questions
❓ Is this tool free?
Yes! All our tools are completely free. No registration, no hidden charges, no ads. Just open and use.
🔒 Is my data safe?
Absolutely. All calculations happen in your browser. We don't store, send, or track any of your data. Everything is processed locally on your device.
📱 Can I use this on mobile?
Yes! All our tools are fully responsive and work perfectly on smartphones, tablets, and desktops.
🌐 Do I need internet?
No! Once the page loads, you can use the tool completely offline. All calculations happen in your browser without any server connection.