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Roman numbers are used on different occasions in life. But sometimes it is a little bit confusing when it comes to writing a huge roman number.
No worry. In this guide, you will be learning how to form a big number in the roman number system. This is also counted as one of the greatest skills when you know number systems more than one.
This journey of learning roman numbers is adventurous and full of fun. Let’s get into the learning process of forming or converting a normal number into a roman version.
What Do You Need To Excel In Roman Numbers?
 Roman Digits or Symbolic representations of numerals
 Rules of Roman Number formation
 Formation of simple numbers using roman symbols
 Formation of complex numbers using roman symbols
Understanding The Roman Digits
A digit is the smaller unit of any number system. While you are going to learn a new number scheme, you need to have a basic understanding of its digits.
Roman numbers don’t have its own number architecture but it uses English Alphabets to represent any numerical value. Once you understand these symbols, you just need to learn roman number formation to excel in this number system.
Roman Representation  Number 

I  1 
V  5 
X  10 
L  50 
C  100 
D  500 
M  1,000 
Roman Numbers From 1 to 10
Observe the Table given below carefully to understand the basics of Roman numbers system.
Number  Roman Numeral 

1  I 
2  II 
3  III 
4  IV 
5  V 
6  VI 
7  VII 
8  VIII 
9  IX 
10  X 
Observations
1️⃣ A Symbol can only be repeated a maximum of three times.
For Example You can not write “IIII” For number 4 or “VIIII” For number 9.
2️⃣ When a symbol appears to the Right side of another symbol, it’s value will be added.
For Example When you write “III“, It’s Value will be 1+1+1=3 [I+I+I=III] And When You write “VII”, It’s Value will be 5+1+1=7 [V+I+I=VII]
3️⃣ When a symbol appears to the left side of another symbol, it’s value will be subtracted.
For Example When you write “IV”, Its value will be 51=4 [VI=IV] And when you write “IX”, Its value will be 101=9 [XI=IX]
Some Important Notes
Some fair questions may definitely have arisen in your brain. Let’s find out solutions of these questions.
Question 1. Can I write “IIV” for number 3 or “IIIX” for number 7?
Answer 1 Any symbol can only be subtracted once. So, you can not write “IIV” for number 3 or “IIIX” for number 7.
Question 2. Can I write “VV” for number 10?
Answer 2 Symbols that contain 5 (Like V=5, L=50, D=500) can not be repeated. So, you can’t write “VV” for the number 10.
Question 3. Is value of “VX” 5?
Answer 3 Symbols that contain 5 (Like V=5, L=50, D=500) can not be subtracted in any other symbol. So, The given number formation is not valid.
Roman Numbers From 1 to 100
Observations and QnA’s are discussed about numbers from 1 to 10 will help you understand the roman numbers from 1 to 100. So, make sure you have read those.
Number  Roman Number  Number  Roman Number 

1  I  51  LI 
2  II  52  LII 
3  III  53  LIII 
4  IV  54  LIV 
5  V  55  LV 
6  VI  56  LVI 
7  VII  57  LVII 
8  VIII  58  LVIII 
9  IX  59  LIX 
10  X  60  LX 
11  XI  61  LXI 
12  XII  62  LXII 
13  XIII  63  LXIII 
14  XIV  64  LXIV 
15  XV  65  LXV 
16  XVI  66  LXVI 
17  XVII  67  LXVII 
18  XVIII  68  LXVIII 
19  XIX  69  LXIX 
20  XX  70  LXX 
21  XXI  71  LXXI 
22  XXII  72  LXXII 
23  XXIII  73  LXXIII 
24  XXIV  74  LXXIV 
25  XXV  75  LXXV 
26  XXVI  76  LXXVI 
27  XXVII  77  LXXVII 
28  XXVIII  78  LXXVIII 
29  XXIX  79  LXXIX 
30  XXX  80  LXXX 
31  XXXI  81  LXXXI 
32  XXXII  82  LXXXII 
33  XXXIII  83  LXXXIII 
34  XXXIV  84  LXXXIV 
35  XXXV  85  LXXXV 
36  XXXVI  86  LXXXVI 
37  XXXVII  87  LXXXVII 
38  XXXVIII  88  LXXXVIII 
39  XXXIX  89  LXXXIX 
40  XL  90  XC 
41  XLI  91  XCI 
42  XLII  92  XCII 
43  XLIII  93  XCIII 
44  XLIV  94  XCIV 
45  XLV  95  XCV 
46  XLVI  96  XCVI 
47  XLVII  97  XCVII 
48  XLVIII  98  XCVIII 
49  XLIX  99  XCIX 
50  L  100  C 
Some Other Important Rules
1️⃣ The symbol “I” Can only be subtracted from “V” and “X”.
2️⃣ The symbol “X” Can only be subtracted from “L” and “C”.
Roman Numbers From 100 to 1000
Number  Roman Numeral 

100  C 
200  CC 
300  CCC 
400  CD 
500  D 
600  DC 
700  DCC 
800  DCCC 
900  CM 
1000  M 
Observations and Rules
1️⃣ The symbol “C” Can only be subtracted from “D” and “M”.
Roman Numbers Counting Chart From 1 to 1 Billion
You have now familiar with roman numbers from 1 to 1000. But what about bigger numbers. You need to learn a little bit about the bigger Roman Numbers. Observe the given chart below to understand the bigger roman number formation.
Observations
1️⃣ When we place one bar ¯ over a symbol (except “I”), it multiplies the value by 1000.
2️⃣ When we place Two bars ¯ ¯ over a symbol (except “I”), it multiplies the value by 1000*1000.
Conversion of Simple Numbers into Roman
Break down the number in terms of 1, 5, 10, 50, 100, 500, 1000 and write roman symbols accordingly. Below are given some examples to help you understand.
1  5  10  50  100  500  1000 
I  V  X  L  C  D  M 
 89=50+10+10+10+9(101)=LXXXIX
 230=100+100+10+10+10=CCXXX
 2020=1000+1000+10+10=MMXX
 2021=1000+1000+10+10+1=MMXXI
 2022=1000+1000+10+10+1+1=MMXXII
 1550=1000+500+50=MDL
 1234=1000+100+100+10+10+10+4(51)=MCCXXXIV
 999=900(1000100)+90(10010)+9(101)=CMXCIX
 3214=1000+1000+1000+100+100+10+4(51)=MMMCCXIV
Complete list of Rules
Symbols
I – 1
V – 5
X – 10
L – 50
C – 100
D – 500
M – 1000
Rules
 A Symbol can only be repeated a maximum of three times.
 When a symbol appears on the Right side of another symbol, it’s value will be added.
 When a symbol appears to the left side of another symbol, it’s value will be subtracted.
 The symbol “I” Can only be subtracted from “V” and “X”.
 The symbol “X” Can only be subtracted from “L” and “C”.
 The symbol “C” Can only be subtracted from “D” and “M”
 Any symbol can only be subtracted once i.e. written once on the left side.
 Symbols that contain 5 (Like V=5, L=50, D=500) can not be repeated.
 Symbols that contain 5 (Like V=5, L=50, D=500) can not be subtracted in any other symbol.
 When we place one bar ¯ over a symbol (except “I”), it multiplies the value by 1000.
 When we place Two bars ¯ ¯ over a symbol (except “I”), it multiplies the value by 1000*1000.
Also learn Hindi Numbers counting in easy way.
Faq’s – Roman Number Counting

How to write 9 in Roman numerals?
Convert the number into the terms of 1 and 10 i.e. I and X.
Then Subtract 1 from 10 i.e. XI =IX
Hence, 9=IX 
How to write 50 in Roman numerals?
Number 50 is represented by “L” in Romans. Hence, 50=L

2020 & 2021 in roman numeral?
2020= 1000+1000+10+10=MMXX
2021= 1000+1000+10+10+1=MMXXI 
100 in roman numeral?
Number 100 is represented by “c” in Romans. Hence, 100=C

What is “M” represents in roman numbers?
The symbol “M” represents “1000” in Roman numerals. Hence, M=1000

49 in Roman numbers?
Break down the number into the terms of 1, 10, 50 i.e. I, X, L.
Since 49=40(5010)+9(101)=XLIX