Roman Numerals
Ancient Romans used a special method of showing numbers
Examples: They wrote V instead of 5
And wrote IX instead of 9
Read on to learn about Roman Numerals or go straight to the Roman Numeral Conversion Tool.
The Roman Symbols
Romans Numerals are based on the following symbols:
1

5

10

50

100

500

1000

I

V

X

L

C

D

M

Basic Combinations
Which can be combined like this:
1

2

3

4

5

6

7

8

9

I

II

III

IV

V

VI

VII

VIII

IX

10

20

30

40

50

60

70

80

90

X

XX

XXX

XL

L

LX

LXX

LXXX

XC

100

200

300

400

500

600

700

800

900

C

CC

CCC

CD

D

DC

DCC

DCCC

CM

Forming Numbers  The Rules
When a symbol appears after a larger symbol it is added
 Example: VI = V + I = 5 + 1 = 6
But if the symbol appears before a larger symbol it is subtracted
 Example: IX = X  I = 10  1 = 9
To Remember: After Larger is Added
Don't use the same symbol more than three times in a row (but IIII is sometimes used for 4, particularly on clocks)
Really Big Numbers
Numbers greater than 1,000 are formed by placing a dash over the symbol, meaning "times 1,000", but these are not commonly used:
5,000 
10,000 
50,000 
100,000 
500,000 
1,000,000 
V 
X 
L 
C 
D 
M 
How to Convert to Roman Numerals
Break the number into Thousands, Hundreds, Tens and Ones, and write down each in turn.
Example: Convert 1984 to Roman Numerals.
Break 1984 into 1000, 900, 80 and 4, then do each conversion
 1000 = M
 900 = CM
 80 = LXXX
 4 = IV
1000 + 900 + 80 + 4 = 1984, so 1984 = MCMLXXXIV
How To Remember
Think "MeDiCaL XaVIer".
It has the roman numerals in descending order from 1000 to 1.
Conversion Tool
You can convert to/from Roman Numerals here: