Table of contents 
What are Roman Numerals? 
How to Write Numbers in Roman Numerals? 
Large Roman Numerals 
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Tip: There is no symbol for zero in Roman system.
With the help of the chart given below, you can write large numbers in Roman numerals.
When a letter is used more than once, we add its value each time to get the number.
Examples: II = 1 + 1 = 2
XXX = 10 + 10 + 10 = 30
CCC = 100 + 100 + 100 = 300
MM = 1000 + 1000 = 2000
MMM = 1000 + 1000 + 1000 = 3000
Tips:
 The same symbol cannot be repeated more than 3 times together.
 The symbols V, L and D are never repeated.
Check out the correct way of writing 45 in Roman Numerals!
When a symbol of smaller value is written to the right of a symbol of larger value, add the two values.
Examples: VII = 5 + 1 + 1 = 7
XII = 10 + 1 + 1 = 12
XXVII = 10 + 10 + 5 + 1 + 1 = 27
LVII = 50 + 5 + 1 + 1= 57
LXVI = 50 + 10 + 5 + 1 = 66
CVII = 100 + 5 + 1 + 1 = 107
CLXV = 100 + 50 + 10 + 5 = 165
DC = 500 + 100 = 600
MDCXVIII = 1000 + 500 + 100 + 10 + 5 + 1 + 1 + 1 = 1618
Choose the Roman representation for 18
When a symbol of a smaller value is written to the left of a symbol of a larger value, the smaller value is subtracted from the larger value.
Examples: IV = 5 – 1 = 4
IX = 10 – 1 = 9
XL = 50 – 10 = 40
XC = 100 – 10 = 90
CD = 500 – 100 = 400
CM = 1000 – 100 = 900
Tips:
 V, L and D are never subtracted.
 I can be subtracted from V and X only once.
 X can be subtracted from L and C only once.
 C can be subtracted from D and M only once.
 Thus, I or V is never written to the left of L or C. L is never written to the left of C.
Example 1: Write the following in Roman numerals.
(a) 45
45 = 40 + 5 = XL + V = XLV
(b) 99
99 = 90 + 9 = XC + IX = XCIX
(c) 92
92 = 90 + 2 = XC + II = XCII
(d) 78
78 = 50 + 20 + 5 + 3 = L + XX + V + III = LXXVIII
(e) 181
181 = 100 + 80 + 1 = C + LXXX + I = CLXXXI
Example 2: Write the following in HinduArabic numeral.
(a) LXV
LXV = L + X + V = 50 + 10 + 5 = 65
(b) LIII
LIII = L + III = 50 + 3 = 53
(c) CDXCIX
CDXCIX = CD + XC + IX = 400 + 90 + 9 = 499
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