Roman Numerals Converter — Free
Convert positive integers to Roman notation and interpret supported Roman numerals. The comparison is useful for learning the notation or checking numbered sections in a document.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Numbers stay on your device. Nothing is sent to a server.
How to use this tool
Choose the direction and enter an integer or Roman numeral. A fractional part in numeric input may be discarded, so enter the intended integer explicitly and stay within the supported range.
Results and examples
Fourteen is XIV: X contributes ten and IV represents four through subtractive notation. Simply adding the value of every letter would therefore give the wrong result.
Limitations
- Historical variants and overbar notation for large values are not comprehensively supported.
- This is not a notation system for arbitrary decimals, negative values or ordinary zero.
Fields
| Field | Guidance and constraints |
|---|---|
| Direction | Number → Roman / Roman → Number |
| Value | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
Why is fourteen XIV?
Fourteen is XIV: X contributes ten and IV represents four through subtractive notation. Simply adding the value of every letter would therefore give the wrong result.
Can it represent decimal fractions?
Historical variants and overbar notation for large values are not comprehensively supported. This is not a notation system for arbitrary decimals, negative values or ordinary zero.
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