Number to Roman Numerals Online

Number to Roman Numerals Converter

Convert numbers to Roman numerals instantly with Webtooly’s free and accurate online tool. Whether you're a student, teacher, historian, or just curious, our converter allows you to transform Arabic numbers (like 25, 100, or 1999) into their equivalent Roman numeral representations (like XXV, C, or MCMXCIX) in a matter of seconds.

What Are Roman Numerals?

Roman numerals are an ancient numbering system developed in Rome and used throughout the Roman Empire. Unlike the decimal (base-10) system used today, Roman numerals are based on combinations of Latin letters: I, V, X, L, C, D, and M.

Roman Numeral Symbols

Symbol	Value
I	1
V	5
X	10
L	50
C	100
D	500
M	1000

How the Number to Roman Numeral Converter Works

1. Enter any integer between 1 and 3999.
2. Click the "Convert" button.
3. The tool will instantly show the corresponding Roman numeral.

Example:

Input: 25  
Result: XXV

Formula/Logic Behind Number to Roman Conversion

To convert numbers into Roman numerals, we use a mapping of values and symbols in descending order. Starting from the highest value, we subtract the value from the number and add the corresponding Roman symbol to the result until the number is reduced to zero.

Here’s the conversion logic:

Decimal   Roman
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

Convert Numbers to Roman Numerals Instantly

This tool is ideal for converting any whole number (1–3999) into Roman numerals. Common use cases include:

• Classical event year labeling (e.g., MMXXV for 2025)
• Chapter and section numbers in books
• Clock faces (I to XII)
• Monarch and pope titles (e.g., Louis XIV)

Popular Conversions

Number	Roman Numeral
1	I
5	V
10	X
25	XXV
50	L
100	C
500	D
1000	M
1999	MCMXCIX
2024	MMXXIV

Frequently Asked Questions (FAQs)

How do I convert numbers to Roman numerals?

Use this tool by entering a number between 1 and 3999. The system uses Roman numeral mapping and subtractive logic to show you the exact Roman equivalent.

Can Roman numerals represent numbers larger than 3999?

Traditional Roman numerals go up to 3999 (MMMCMXCIX). Larger values were historically represented using overlined letters, but that system isn't standardized.

What is XXV in numbers?

XXV is the Roman numeral for 25.

How do I write 2024 in Roman numerals?

2024 is written as MMXXIV in Roman numerals.

What is the Roman numeral for 0?

The Roman numeral system does not have a symbol for zero.

What are Hindu-Arabic numbers?

Hindu-Arabic numbers are the standard decimal numbers we use today (0–9). The Roman system converts these into Latin-letter symbols.