Math & Numbers
Roman Numeral Converter
Convert numbers to Roman numerals and back. Supports values from 1 to 3999.
Convertissez des nombres en chiffres romains et vice versa (1–3999)
Fonctionnalités
Number → Roman
Convert any integer to its Roman numeral equivalent.
Roman → Number
Decode any Roman numeral string to its decimal value.
Instant Conversion
Results appear as you type.
Copy Output
One-click copy for use anywhere.
How to Convert
- Enter a number (1–3999) to get the Roman numeral.
- Or enter a Roman numeral (e.g., XLII) to get the decimal number.
- Copy the result.
FAQ
What's the largest number in Roman numerals?▾
Standard Roman numerals go up to 3,999 (MMMCMXCIX). Numbers above that require special notation not widely standardized.
How do you write 2025 in Roman numerals?▾
2025 = MMXXV (MM=2000, XX=20, V=5).
Roman Numeral Basics
- I=1, V=5, X=10, L=50
- C=100, D=500, M=1000
- IV=4, IX=9, XL=40, XC=90
- CM=900, CD=400
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