Roman Numeral Calculator

Enter value and click on calculate. Result will be displayed.
Select calculator :
 
Enter First Numeral :
Enter Second Numeral :
Result:
Roman numeral :
Standard numeral :

A Roman Numeral Calculator is a tool that helps convert numbers between Roman numerals (like X, IV, or MCMXC) and standard Arabic numerals (like 10, 4, or 1990). Some advanced versions can also perform mathematical operations using Roman numerals, like addition, subtraction, multiplication, and division.

Why use a Roman Numeral Calculator?

  • Conversion: Quickly convert numbers to or from Roman numerals without memorizing the rules.
  • Accuracy: Avoid mistakes when writing or interpreting Roman numerals.
  • Education: Learn and practice the Roman numeral system.
  • Practicality: Decode Roman numerals on old clocks, book chapters, movie credits, and historical references.

How does it work?

  1. Input: You enter a number — either a Roman numeral (like "XIV") or a standard number (like "14").
  2. Conversion: The calculator translates it into the other format.
  3. Arithmetic (optional): If it supports math operations, you can enter two Roman numerals and choose an operation (like addition), and it gives the result in Roman numerals.

When do you use it?

  • Reading historical dates (like MMXXV for 2025).
  • Interpreting Roman numeral chapter titles or movie sequels.
  • Understanding Roman numerals on traditional clock faces.
  • Studying ancient numbering systems or working on educational projects.