Question 1

Is Roman numeral conversion safe?

Accepted Answer

Safe. All conversions are performed locally in your browser; input data is never uploaded to any server.

Question 2

Why only support up to 3999?

Accepted Answer

Standard Roman numerals use the seven letters M, D, C, L, X, V, I; the maximum value that can be represented without an overline is 3999 (MMMCMXCIX). Larger numbers require extended notation with an overline, which is not within the standard range.

Question 3

Why is IIII considered an error?

Accepted Answer

The tool validates standard notation: 4 should be written as IV, not IIII; 9 as IX. Non-standard repetitions are deemed invalid to ensure a unique and standard result.

Roman Numeral Conversion

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