Roman Numerals to Arabic Numbers 1 to 100

Different from Arabic numbers , there are 7 Roman numerals: I, V, X, L, C, D and M, where V is equal to 5 and M is equal to 1000.

RomanArabic
I1
V5
X10
L50
C100
D500
M1000
ArabicRoman
1I
5V
10X
50L
100C
500D
1000M

The basic rule is when the larger number is in front, then add, when the smaller number is in front, then minus. For example:

  • VI: where V is 5 and I is 1, V is larger and in front, so add the 2 numbers together 5+1 = 6
  • IL: where L is 50 and I is 1, I is smaller and in front, so minus the 2 numbers together 50-1 = 49
  • where the letters are the same, add together: III = 1 + 1 + 1 = 3

Convert Rules:

The following is the table to convert from Roman numerals to Arabic numbers. For example,

  • 23 = 20 + 3 = XX + III = XXIII
  • 58 = 50 + 8 = L + VIII = LVIII
NumberThousandsHundredsTensOnes
1MCXI
2MMCCXXII
3MMMCCCXXXIII
4 CDXLIV
5 DLV
6 DCLXVI
7 DCCLXXVII
8 DCCCLXXXVIII
9 CMXCIX

The following is the conversion from Roman numerals to Arabic numbers for 1 to 100:

RomanArabicRomanArabic
I1LI51
II2LII52
III3LIII53
IV4LIV54
V5LV55
VI6LVI56
VII7LVII57
VIII8LVIII58
IX9LIX59
X10LX60
XI11LXI61
XII12LXII62
XIII13LXIII63
XIV14LXIV64
XV15LXV65
XVI16LXVI66
XVII17LXVII67
XVIII18LXVIII68
XIX19LXIX69
XX20LXX70
XXI21LXXI71
XXII22LXXII72
XXIII23LXXIII73
XXIV24LXXIV74
XXV25LXXV75
XXVI26LXXVI76
XXVII27LXXVII77
XXVIII28LXXVIII78
XXIX29LXXIX79
XXX30LXXX80
XXXI31LXXXI81
XXXII32LXXXII82
XXXIII33LXXXIII83
XXXIV34LXXXIV84
XXXV35LXXXV85
XXXVI36LXXXVI86
XXXVII37LXXXVII87
XXXVIII38LXXXVIII88
XXXIX39LXXXIX89
XL40XC90
XLI41XCI91
XLII42XCII92
XLIII43XCIII93
XLIV44XCIV94
XLV45XCV95
XLVI46XCVI96
XLVII47XCVII97
XLVIII48XCVIII98
XLIX49XCIX99
L50C100

The following is the conversion from Arabic numbers to Roman numerals for 1 to 100:

ArabicRomanArabicRoman
1I51LI
2II52LII
3III53LIII
4IV54LIV
5V55LV
6VI56LVI
7VII57LVII
8VIII58LVIII
9IX59LIX
10X60LX
11XI61LXI
12XII62LXII
13XIII63LXIII
14XIV64LXIV
15XV65LXV
16XVI66LXVI
17XVII67LXVII
18XVIII68LXVIII
19XIX69LXIX
20XX70LXX
21XXI71LXXI
22XXII72LXXII
23XXIII73LXXIII
24XXIV74LXXIV
25XXV75LXXV
26XXVI76LXXVI
27XXVII77LXXVII
28XXVIII78LXXVIII
29XXIX79LXXIX
30XXX80LXXX
31XXXI81LXXXI
32XXXII82LXXXII
33XXXIII83LXXXIII
34XXXIV84LXXXIV
35XXXV85LXXXV
36XXXVI86LXXXVI
37XXXVII87LXXXVII
38XXXVIII88LXXXVIII
39XXXIX89LXXXIX
40XL90XC
41XLI91XCI
42XLII92XCII
43XLIII93XCIII
44XLIV94XCIV
45XLV95XCV
46XLVI96XCVI
47XLVII97XCVII
48XLVIII98XCVIII
49XLIX99XCIX
50L100C

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