This calculator will help you to convert roman numerals to decimal numbers. For example, it can help you find out

what number is Roman DXXI? (The answer is:

**521**). Enter roman numeral (e.g. 'DXXI') and hit the 'Convert' button.

Roman numerals list: I=1 V=5 X=10 L=50 C=100 D=500 M=1000