Roman numeral converter
Type a number (1–3999) or a Roman numeral — the other field converts live, both ways. Copy either result. Nothing is uploaded.
Number (1–3999)
Roman numeral
Reference
| Symbol | Value |
|---|---|
| I | 1 |
| V | 5 |
| X | 10 |
| L | 50 |
| C | 100 |
| D | 500 |
| M | 1000 |
Everything runs in your browser. No upload, no sign-up.
How it works
STEP 1
Type in either field
Enter a number from 1 to 3999, or a Roman numeral like MMXXIV.
STEP 2
See it convert live
The other field updates instantly, and tells you if something is invalid.
STEP 3
Copy the result
Tap copy on either field. All private, nothing leaves your device.