Roman Numerals Converter

Conversion

Convert between integers and Roman numerals (1–3999).

Formula

Greedy subtraction: 1000→M, 900→CM, 500→D, 400→CD, 100→C, 90→XC, 50→L, 40→XL, 10→X, 9→IX, 5→V, 4→IV, 1→I
  • Range: I (1) to MMMCMXCIX (3999).
  • Reverse (Roman to integer): sum symbol values left to right, subtract when a smaller symbol precedes a larger one.

Roman Numerals Converter Example

Inputs
  • Integer (1–3999): 2024

2024 = MM (2000) + XXIV (24) = MMXXIV

Frequently asked questions

How do I use the Roman Numerals Converter?
Enter the value in the input field and the result updates immediately.
How accurate is this converter?
Uses internationally recognised conversion factors. Results are rounded to the displayed decimal places.
Can I verify this manually?
Yes — apply the formula shown above step by step.