Unit Converters
Roman Numeral Converter
Convert numbers to Roman numerals and back.
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About the Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers, free (2026 → MMXXVI). Both fields stay in sync as you type, covering the full standard range 1–3999. Handy for Super Bowl numbers, movie copyright years, clock faces, tattoos, outlines, and homework — with correct subtractive notation (IV, IX, XL) every time.
How to use the Roman Numeral Converter
- 1Type a number to get the Roman numeral, or type a Roman numeral to get the number.
- 2Both fields stay in sync.
- 3Copy whichever you need.
Frequently asked questions
What range is supported?
Standard Roman numerals cover 1 to 3999. There's no symbol for zero or negative numbers.
What does MMXXVI mean?
MMXXVI is 2026: MM = 2000, XX = 20, VI = 6.
Why is 4 written as IV and not IIII?
Standard subtractive notation places a smaller numeral before a larger one (IV = 5−1). Fun exception: many clock faces still use IIII for visual balance.