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Roman Numeral Converter

Convert between numbers (1–3999) and Roman numerals — instantly and accurately.

Roman Numeral Converter

About Roman Numerals

Roman numerals use seven letters: I (1), V (5), X (10), L (50), C (100), D (500), M (1000). Numbers are formed by combining these symbols, using subtractive notation for values like 4 (IV) and 9 (IX).

Basic symbols

I=1 · V=5 · X=10 · L=50 · C=100 · D=500 · M=1000

Subtractive pairs

IV=4 · IX=9 · XL=40 · XC=90 · CD=400 · CM=900

Range

Supports 1–3999 (traditional range).

Largest example

3999 = MMMCMXCIX

How to Use This Converter

  1. Enter the value you want to convert.
  2. Choose the From unit.
  3. Choose the To unit.
  4. Click Convert to see the result instantly.

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Frequently Asked Questions

How do I write 2024 in Roman numerals?+
2024 = MMXXIV (M=1000, M=1000, X=10, X=10, IV=4).
What is the largest Roman numeral?+
3999 = MMMCMXCIX. Numbers above 3999 traditionally use a bar over the numeral to indicate thousands.
Why is 4 written as IV instead of IIII?+
Roman numerals use subtractive notation: a smaller numeral before a larger one means subtraction. IV = 5 − 1 = 4.
What does the Roman numeral M mean?+
M = 1,000 (from the Latin 'mille').
Is this converter free?+
Yes — completely free with no registration required.

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