Convert between Roman numerals and regular numbers. Trusted by thousands of investors and professionals.

YOUR RESULT

Roman Equivalent:

Decimal Equivalent:

Visual breakdown will be displayed here.

How Roman Numeral Converter Works

Input a Roman numeral or a regular number.

Click on the Calculate button.

View the converted result displayed prominently.

The formula used converts Roman numerals into their decimal equivalent and vice versa.

Example: X = 10, III = 3

Why Use Our Roman Numeral Converter

The conversion from Roman to decimal is based on the sum of values represented by each numeral.

Variables: I=1, V=5, X=10, L=50, C=100, D=500, M=1000

Yes, you can convert either way.

The maximum for decimal input is 3999.

Only valid Roman numeral combinations are accepted.