Roman Numerals

Letter
I
II
III
IV
V
VI
VII
VIII
IX
Value
1
2
3
4
5
6
7
8
9
 
Letter
X
XX
XXX
XL
L
LX
LXX
LXXX
XC
Value
10
20
30
40
50
60
70
80
90
 
Letter
C
D
M
Value
100
500
1000
5000
10,000
50,000
100,000
500,000
1,000,000
  • If letter(s) are placed before another letter of greater value, the total value decreases by the amount of the number of lesser value: [e.g., IX = 9, XL = 40, VC = 95]
  • If letter(s) are placed after another letter of greater value, the total value increases by the amount of the number of lesser value: [e.g., XI = 11, LX = 60, CV = 105]
  • The total value of repeated letters (1-2 repetitions) is the number of occurences of that letter multiplied by the value of the repeated letter: [e.g., XX = 20, CCC = 300 BUT 40 = XL, (not XXXX)]
  • The total value of letter(s) with a bar above them is the value of the letters multiplied by 1000: [e.g., IV = 4, IV(need bar) = 4000]