Roman numeral converter

Convert between Arabic numbers and Roman numerals instantly. Type either and get the other.

Enter a number between 1 and 3999
Enter Roman numerals (I V X L C D M)
Common conversions:
Roman numeral reference

How Roman numerals work

Roman numerals use seven symbols to represent numbers. The symbols are I (1), V (5), X (10), L (50), C (100), D (500), and M (1000). Numbers are formed by combining these symbols. Generally larger values are written before smaller ones and you add their values together — so VIII means 5 + 1 + 1 + 1 = 8 and LXII means 50 + 10 + 1 + 1 = 62.

The subtractive principle handles the four values that would otherwise require four of the same symbol in a row. Instead of IIII for 4, Romans wrote IV meaning 5 minus 1. Instead of VIIII for 9, they wrote IX. The six subtractive combinations are IV (4), IX (9), XL (40), XC (90), CD (400), and CM (900). These are the building blocks that make the system work.

What is 2024 in Roman numerals

2024 in Roman numerals is MMXXIV. Breaking it down: MM = 2000, XX = 20, IV = 4. So 2024 = MM + XX + IV = MMXXIV. This is the format commonly used for copyright years, movie release years, and event dates where Roman numerals are traditionally used.

Common uses for Roman numerals today

Roman numerals appear in copyright notices on films, television shows, and books. Sporting events like the Super Bowl and Olympic Games use Roman numerals for edition numbers. Clock and watch faces frequently use Roman numerals for hours. Chapter and section numbers in books, legal documents, and formal outlines use Roman numerals. Monarchs and popes use Roman numerals to distinguish rulers with the same name — Henry VIII, Pope John Paul II. Architectural inscriptions and monuments display years in Roman numerals.

Frequently asked questions

How do I convert a number to Roman numerals?

Type any number between 1 and 3999 into the Arabic number field and the Roman numeral appears instantly. For example 2024 converts to MMXXIV.

What is 2024 in Roman numerals?

2024 in Roman numerals is MMXXIV. MM = 2000, XX = 20, IV = 4.

What is XIV in numbers?

XIV in numbers is 14. X = 10, IV = 4, so XIV = 10 + 4 = 14.

What are the basic Roman numeral symbols?

I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000. All Roman numerals are built from these seven symbols.

Why can Roman numerals only go up to 3999?

Standard Roman numerals top out at 3999 (MMMCMXCIX) because MMM = 3000 is the maximum using standard notation. Numbers from 4000 up require non-standard extensions.