How to convert roman numerals to number

How to convert roman numerals to decimal number.

Roman numerals to decimal number conversion

For roman numeral r:

    1. From the following table, find the highest roman numeral (n) with the highest decimal value (v)

      that is taken from the left part of the roman numeral r:

 

Roman numeral (n)Decimal value (v)
I1
IV4
V5
IX9
X10
XL40
L50
XC90
C100
CD400
D500
CM900
M1000

 

  1. Add to the decimal number x the value v of the roman numeral that you found:

    x = + v

  2. Repeat stages 1 and 2 until you get all the roman numerals of r.

Example #1

r = XXXVI

Iteration #Highest roman numeral (n)Highest decimal value (v)Decimal number (x)
1X1010
2X1020
3X1030
4V535
5I136

 

Example #2

r = MMXII

Iteration #Highest roman numeral (n)Highest decimal value (v)Decimal number (x)
1M10001000
2M10002000
3X102010
4I12011
5I12012

 

 

Example #3

r = MCMXCVI

Iteration #Highest roman numeral (n)Highest decimal value (v)Decimal number (x)
1M10001000
2CM9001900
3XC901990
4V51995
5I11996

 

 

How to convert number to roman numerals ►

 


See also

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