Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers (1–3,999), with a step-by-step breakdown.
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Runs entirely in your browser. Your files and text are never uploaded to our server.
- Instant results
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Roman Numeral Converter changes numbers into Roman numerals and Roman numerals back into numbers. Type 2026 to get MMXXVI, or type MCMXCIV to get 1,994 — the tool detects the direction automatically.
It also shows a breakdown of every symbol used and tells you when a Roman numeral is written in a non-standard way, such as IIII instead of IV, and suggests the correct form.
More about Roman Numeral ConverterHow to use, good to know & FAQ
How to use Roman Numeral Converter
- Type a number from 1 to 3,999, or a Roman numeral using I, V, X, L, C, D and M.
- Read the result and the symbol-by-symbol breakdown below it.
- Click Copy result to use it in your document.
Good to know
- Standard Roman numerals cover 1 to 3,999 (MMMCMXCIX). There is no Roman numeral for zero.
- Upper- and lower-case letters both work.
- Only the standard subtractive pairs are accepted: IV, IX, XL, XC, CD and CM.
- Everything runs in your browser.
Frequently asked questions
What is 2026 in Roman numerals?
MMXXVI — two thousands (MM), two tens (XX) and six (VI).
Why does the tool say my numeral is not valid?
It only accepts the standard form. For example, 4 must be IV rather than IIII, and 99 is XCIX rather than IC. When it can, the tool suggests the correct version.
Can it convert numbers above 3,999?
No. Larger numbers need a bar over the numerals (a vinculum), which is not part of the standard modern form.
When to use Roman Numeral Converter
- Writing years in film credits, certificates or invitations
- Numbering chapters, appendices or outline sections
- Reading clock faces, monuments and inscriptions
- Checking homework answers
📘 Read the guide: Roman Numerals: How to Read and Write Them