What Are Roman Numerals?

What are Roman Numerals you ask? Roman Numerals come from ancient Rome. They are a "number system" that uses a combination of letters to express a number!

Although not widely used anymore, Roman Numerals are still used in many places. Roman Numerals are used by sporting events like the Olympic Games, the NFL, and the Super Bowl. Roman Numerals are used for Queens, Kings, and Popes. They are also sometimes used for years, like 2013 is MMXIII. Of course, you also see Roman Numerals on clocks.

To read or write a Roman Numeral, follow these rules:

There are seven capital letters in the Roman Numeral "alphabet" and each letter represents a number as follows:

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

If two or three letters are the same in a row, then simply add them together. Like III = 1 + 1 + 1 = 3

A letter can only be repeated three times. For example, CCC will work, but CCCC is not valid.

If two letters are next to each other, compare the first and second letter. If the first letter is larger than the second letter, then add them up together. For example, XV is 10 + 5 = 15

Again, if two letters are next to each other, compare the first and second letter. If the first letter is smaller than the second letter, then subtract the first letter from the second letter. For example, IX is 10 - 1 = 9

A bar on top of a letter makes it 1000 larger.

There is no Roman Numeral for zero or a negative number. All Roman Numerals are integers.

Roman Numerals Converter
Check out Research Maniacs' popular Roman Numerals Converter here.

List of Roman Numerals
List of Roman Numerals in alphabetical order.

Roman Numerals App
Roman Numerals is a "number system" that uses a combination of letters to express a number. This app will convert Numeric numbers to Roman Numerals.

100 Roman Numerals
Below is a list of the first 100 Roman Numerals:

1 = I
2 = II
3 = III
4 = IV
5 = V
6 = VI
7 = VII
8 = VIII
9 = IX
10 = X
11 = XI
12 = XII
13 = XIII
14 = XIV
15 = XV
16 = XVI
17 = XVII
18 = XVIII
19 = XIX
20 = XX
21 = XXI
22 = XXII
23 = XXIII
24 = XXIV
25 = XXV
26 = XXVI
27 = XXVII
28 = XXVIII
29 = XXIX
30 = XXX
31 = XXXI
32 = XXXII
33 = XXXIII
34 = XXXIV
35 = XXXV
36 = XXXVI
37 = XXXVII
38 = XXXVIII
39 = XXXIX
40 = XL
41 = XLI
42 = XLII
43 = XLIII
44 = XLIV
45 = XLV
46 = XLVI
47 = XLVII
48 = XLVIII
49 = XLIX
50 = L
51 = LI
52 = LII
53 = LIII
54 = LIV
55 = LV
56 = LVI
57 = LVII
58 = LVIII
59 = LIX
60 = LX
61 = LXI
62 = LXII
63 = LXIII
64 = LXIV
65 = LXV
66 = LXVI
67 = LXVII
68 = LXVIII
69 = LXIX
70 = LXX
71 = LXXI
72 = LXXII
73 = LXXIII
74 = LXXIV
75 = LXXV
76 = LXXVI
77 = LXXVII
78 = LXXVIII
79 = LXXIX
80 = LXXX
81 = LXXXI
82 = LXXXII
83 = LXXXIII
84 = LXXXIV
85 = LXXXV
86 = LXXXVI
87 = LXXXVII
88 = LXXXVIII
89 = LXXXIX
90 = XC
91 = XCI
92 = XCII
93 = XCIII
94 = XCIV
95 = XCV
96 = XCVI
97 = XCVII
98 = XCVIII
99 = XCIX
100 = C