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.
Roman | Arabic |
---|---|
I | 1 |
V | 5 |
X | 10 |
L | 50 |
C | 100 |
D | 500 |
M | 1000 |
Arabic | Roman |
---|---|
1 | I |
5 | V |
10 | X |
50 | L |
100 | C |
500 | D |
1000 | M |
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
The following is the conversion from Roman numerals to Arabic numbers for 1 to 50:
Roman | Arabic | Roman | Arabic |
---|---|---|---|
I | 1 | XXVI | 26 |
II | 2 | XXVII | 27 |
III | 3 | XXVIII | 28 |
IV | 4 | XXIX | 29 |
V | 5 | XXX | 30 |
VI | 6 | XXXI | 31 |
VII | 7 | XXXII | 32 |
VIII | 8 | XXXIII | 33 |
IX | 9 | XXXIV | 34 |
X | 10 | XXXV | 35 |
XI | 11 | XXXVI | 36 |
XII | 12 | XXXVII | 37 |
XIII | 13 | XXXVIII | 38 |
XIV | 14 | XXXIX | 39 |
XV | 15 | XL | 40 |
XVI | 16 | XLI | 41 |
XVII | 17 | XLII | 42 |
XVIII | 18 | XLIII | 43 |
XIX | 19 | XLIV | 44 |
XX | 20 | XLV | 45 |
XXI | 21 | XLVI | 46 |
XXII | 22 | XLVII | 47 |
XXIII | 23 | XLVIII | 48 |
XXIV | 24 | XLIX | 49 |
XXV | 25 | L | 50 |
The following is the conversion from Arabic numbers to Roman numerals for 1 to 50:
Arabic | Roman | Arabic | Roman |
---|---|---|---|
1 | I | 26 | XXVI |
2 | II | 27 | XXVII |
3 | III | 28 | XXVIII |
4 | IV | 29 | XXIX |
5 | V | 30 | XXX |
6 | VI | 31 | XXXI |
7 | VII | 32 | XXXII |
8 | VIII | 33 | XXXIII |
9 | IX | 34 | XXXIV |
10 | X | 35 | XXXV |
11 | XI | 36 | XXXVI |
12 | XII | 37 | XXXVII |
13 | XIII | 38 | XXXVIII |
14 | XIV | 39 | XXXIX |
15 | XV | 40 | XL |
16 | XVI | 41 | XLI |
17 | XVII | 42 | XLII |
18 | XVIII | 43 | XLIII |
19 | XIX | 44 | XLIV |
20 | XX | 45 | XLV |
21 | XXI | 46 | XLVI |
22 | XXII | 47 | XLVII |
23 | XXIII | 48 | XLVIII |
24 | XXIV | 49 | XLIX |
25 | XXV | 50 | L |
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