What does this tool do?
| Direct answer | A reference chart of Roman numeral values from 1 to 3000, including subtractive pairs. |
| Key fact | Roman numerals use 7 letters (I V X L C D M) and subtractive pairs (IV, IX, XL, XC, CD, CM). |
| Processing | Runs locally in your browser; no data is sent to a server. |
How to use
- Scan the chart for your number.
- Use the converters for any value.
Example
Input
2026
Output
MMXXVI
Who is this for?
This tool was built for people who need a fast answer in the browser — no install, no account, no data leaving the device.
Programmers working with low-level data, computer science students, and electronics hobbyists reading registers — anyone tired of converting number bases by hand.
Frequently asked questions
What is the largest Roman numeral?
Standard notation caps at 3999 (MMMCMXCIX).
Why is 4 IIII wrong?
Standard form uses subtraction: IV.
Is there a Roman zero?
No — zero does not exist in Roman numerals.