ZippyToolkit

Roman Numeral Converter

Convert numbers into Roman numerals and Roman numerals back into numbers – for dates, clocks, book chapters, tattoos and homework. Each result shows how it is built, and incorrectly formed numerals are explained.

  • Number 1–3999, Roman numeral → Roman numeral, Number
  • Runs in your browser
  • Free, no sign-up
Loading tool…

How to use Roman Numeral Converter

  1. Type a number (like 2026) or a Roman numeral (like MMXXVI).
  2. The conversion appears instantly, with a breakdown.
  3. Copy the result.

Examples

  • 2026 = MMXXVI
  • 1999 = MCMXCIX
  • XLIV = 44

Supported formats

InputNumber 1–3999, Roman numeral
OutputRoman numeral, Number
ProcessingOn your device, in the browser (no upload)

Limitations to know

  • Standard Roman numerals cover 1–3999. Larger numbers need overline notation, which is not supported.
  • There is no Roman numeral for zero or negative numbers.

Privacy: Roman Numeral Converter runs entirely in your web browser. Your Number 1–3999/Roman numeral data is not uploaded, stored or shared, and nothing about its contents is sent to analytics.

Frequently asked questions

How do you write 2026 in Roman numerals?

2026 is MMXXVI: MM (2000) + XX (20) + VI (6).

Why is 4 written IV and not IIII?

Standard notation uses subtraction for 4 and 9 at each level: IV (4), IX (9), XL (40), XC (90), CD (400), CM (900). Some clock faces use IIII for decorative reasons.

Last updated · Maintained by the ZippyToolkit team