Roman Numerals

I = 1

V = 5

X = 10

L = 50

C = 100

D = 500

M = 1,000


The roman numerals are multiplied by a thousand when a line is drawn over the figure, and by one million when two lines are drawn over the figure.

M = 1,000,000

No figure of a roman numeral can be repeated more than three times in succession.

III = 3 XXX = 30 CCC = 300

In roman numerals the letters V, L and D can not be duplicated because twice the values of each can be represented by: X, C and M.

If a figure is placed to the right of another with a value less than or equal to it, the values are added together.

VII = 7 XX = 20 CLXVIII = 168

If a lower figure is placed to the left of another, the value is subtracted from the larger figure to the right.

IV = 4 IX = 9 XL = 40




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