Roman numeral converter

Convert numbers to Roman numerals and back — the direction is detected automatically.

Type digits (e.g. 2026) or a Roman numeral (e.g. MMXXVI) — the direction is detected automatically.

Standard Roman numerals cover 1–3,999.

Converted in this browser.

How to use

  1. Type digits (2026) or a numeral (MMXXVI).
  2. Convert.
  3. Read the equivalent form.

What it supports

Standard numerals cover 1–3999. Non-canonical spellings like IIII or IC are rejected rather than guessed — 4 must be IV. Values above 3999 have no standard short form and are out of range.

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