Roman Numeral Converter
Convert between Arabic numerals and Roman numerals (I, V, X, L, C, D, M). Supports 1–3999.
Runs locally — nothing is uploaded
How to use
- 1
Choose direction
Convert Arabic numerals to Roman or Roman to Arabic.
- 2
Enter value
Type a number (1–3999) or a Roman numeral such as MMXXVI.
- 3
Copy result
The converted value appears instantly below.
Frequently Asked Questions
Standard Roman numerals from 1 to 3999 (no vinculum notation).
Roman input is normalized to uppercase before parsing.
Yes. Switch between Arabic numeral to Roman and Roman to Arabic numeral modes.
No. Conversion runs locally; nothing is uploaded.
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