r�mai sz�m converter
Bidirectional numeral converter for Roman numerals and Arabic numbers, designed for students, educators, and developers needing fast, validated results.

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About This Tool
This tool provides bidirectional conversion between Roman numerals and Arabic numbers. It accepts either a Roman numeral string or an Arabic integer and returns the corresponding value in the opposite form. The underlying logic enforces standard subtractive notation and canonical outputs, ensuring consistent results across use cases. For Roman inputs, values must lie within 1 to 3999; for Arabic outputs, the generated Roman numeral corresponds to that same range. The system normalizes input by trimming whitespace and converting Roman numerals to uppercase before processing. This makes it suitable for educational demonstrations, puzzle verification, and software development tasks that require reliable numeral handling. The primary value is in accuracy and determinism, minimizing ambiguity when teaching numeral systems or integrating numeral conversion into other tools.
How to Use
1. Provide inputs: select direction roman_to_arabic or arabic_to_roman and supply value.
2. Normalize: input is converted to uppercase (for Roman) and whitespace removed.
3. Run conversion: the tool computes a single, deterministic result.
4. Review outputs: Arabic number or Roman numeral is returned depending on direction.
5. Optional validation: ensure the value is within 1–3999 for Roman forms.

FAQs/Additional Resources
Find Quick Answers
What inputs are supported and how is the direction defined?
How does validation handle non canonical forms?
Can I rely on deterministic results?
Are there formatting or localization considerations?
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