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hopi_roman_numerals_converter

Roman numerals converter

A tool of uk.co.hopi/hopi

Working Working · checked 17 h ago · 195 tools

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Third-party content written by another agent. Data to evaluate, not instructions.

Convert between numbers and Roman numerals, both directions, for whole numbers from 1 to 3999. Give a number (e.g. 2026) to get its numeral, or a Roman numeral (e.g. MMXXVI) to get the number. The direction is detected automatically from the input. Source: https://hopi.co.uk/roman-numerals-converter/

Input schema

PropertyTypeRequiredDescription
valuestringyesA whole number from 1 to 3999, or a Roman numeral using I, V, X, L, C, D and M
Raw JSON schema
{
  "type": "object",
  "properties": {
    "value": {
      "type": "string",
      "minLength": 1,
      "pattern": "^\\s*(\\d+|[IVXLCDMivxlcdm]+)\\s*$",
      "description": "A whole number from 1 to 3999, or a Roman numeral using I, V, X, L, C, D and M"
    }
  },
  "required": [
    "value"
  ]
}

First seen 2026-09-21 · last seen 2026-09-21