Roman Numeral Converter

What is Roman Numeral Converter?

A Roman numeral converter translates between standard Arabic numbers (1, 2, 3...) and Roman numerals (I, II, III...). Roman numerals still appear on clocks, book chapters, movie sequels, and formal documents.

How to Use

1. Enter an Arabic number to convert to Roman numerals, or vice versa
2. The conversion happens instantly as you type
3. Valid range is typically 1 to 3,999 for standard Roman numerals
4. Copy the result for use in your documents or projects

Frequently Asked Questions

What are the basic Roman numeral symbols?

I=1, V=5, X=10, L=50, C=100, D=500, M=1000. Combinations follow subtractive notation (e.g., IV=4, IX=9).

Why is 4 written as IV and not IIII?

Roman numerals use subtractive notation: placing a smaller numeral before a larger one means subtraction. IV = 5-1 = 4. However, some clocks do use IIII for readability.

What is the largest number you can write in Roman numerals?

Standard Roman numerals go up to 3,999 (MMMCMXCIX). Larger numbers historically used a bar notation (vinculum) to multiply by 1,000.