Usage Guide
Arabic Numbers
- • Supported range: 1-3999
- • Enter positive integers
- • Examples: 1, 42, 1994, 2025
Roman Numerals
- • Basic symbols: I V X L C D M
- • Automatically converted to uppercase
- • Examples: I, XLII, MCMXCIV, MMXXIV
Instant Conversion
Real-time Roman numeral conversion as you type. Convert any number from 1-3999 instantly.
100% Accurate
Following standard Roman numeral rules for perfect conversion every time.
Works Everywhere
Responsive design optimized for all devices. Use Romanizer on any screen size.
How to Convert Numbers to Roman Numerals
Understanding Roman Numerals
Roman numerals use seven letters: I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). Romanizer converts between these symbols and regular numbers.
Basic Rules:
- • Same symbols appearing consecutively represent addition
- • Smaller symbols to the right of larger symbols represent addition
- • Smaller symbols to the left of larger symbols represent subtraction
- • Only one smaller symbol can be subtracted
Quick Roman Numeral Reference
1 = I
5 = V
10 = X
50 = L
100 = C
500 = D
1000 = M
2025 = MMXXV