Roman Numerals to Arabic Numbers 1 to 25

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.

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 25:

Roman	Arabic	Roman	Arabic
I	1	XIV	14
II	2	XV	15
III	3	XVI	16
IV	4	XVII	17
V	5	XVIII	18
VI	6	XIX	19
VII	7	XX	20
VIII	8	XXI	21
IX	9	XXII	22
X	10	XXIII	23
XI	11	XXIV	24
XII	12	XXV	25
XIII	13

The following is the conversion from Arabic numbers to Roman numerals for 1 to 25:

Arabic	Roman	Arabic	Roman
1	I	14	XIV
2	II	15	XV
3	III	16	XVI
4	IV	17	XVII
5	V	18	XVIII
6	VI	19	XIX
7	VII	20	XX
8	VIII	21	XXI
9	IX	22	XXII
10	X	23	XXIII
11	XI	24	XXIV
12	XII	25	XXV
13	XIII

You may also like:

• How to Convert Roman Numerals to Arabic Numbers
• Roman Numerals to Arabic Numbers 1 to 50
• Roman Numerals to Arabic Numbers 1 to 100
• Roman Numerals to Arabic Numbers 10 to 1000 by 10
• Roman Numerals to Arabic Numbers 100 to 3000 by 100