Roman Numbers Guide [Complete] + Conversion Rules

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 numerals 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?

  1. Roman Digits or Symbolic representations of numerals
  2. Rules of Roman Number Formation
  3. Formation of simple numbers using roman symbols
  4. 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 their number architecture but it uses English Alphabet 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 RepresentationNumber
I1
V5
X10
L50
C100
D500
M1,000

Complete list of Rules

  1. A Symbol can only be repeated a maximum of three times.
  2. When a symbol appears on the Right side of another symbol, its value will be added.
  3. When a symbol appears on the left side of another symbol, its value will be subtracted.
  4. The symbol “I” Can only be subtracted from “V” and “X”.
  5. The symbol “X” Can only be subtracted from “L” and “C”.
  6. The symbol “C” Can only be subtracted from “D” and “M”
  7. Any symbol can only be subtracted once i.e. written once on the left side.
  8. Symbols that contain 5 (Like V=5, L=50, D=500) can not be repeated.
  9. Symbols that contain 5 (Like V=5, L=50, D=500) can not be subtracted from any other symbol.
  10. When we place one bar ¯ over a symbol (except “I”), it multiplies the value by 1000.
  11. When we place Two bars ¯ ¯ over a symbol (except “I”), it multiplies the value by 1000*1000.

Roman Numbers From 1 to 10

Observe the Table given below carefully to understand the basics of the Roman numbers system.

NumberRoman Numeral
1I
2II
3III
4IV
5V
6VI
7VII
8VIII
9IX
10X

Important Notes [1 to 10]

Some fair questions may have arisen in your brain. Let’s find out solutions to 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 the 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 the value of “VX” 5?

Answer 3- Symbols that contain 5 (Like V=5, L=50, D=500) can not be subtracted from any other symbol. So, The given number formation is not valid.

Roman Numbers From 1 to 100

Observations and Q&As 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.

NumberRoman NumberNumberRoman Number
1I51LI
2II52LII
3III53LIII
4IV54LIV
5V55LV
6VI56LVI
7VII57LVII
8VIII58LVIII
9IX59LIX
10X60LX
11XI61LXI
12XII62LXII
13XIII63LXIII
14XIV64LXIV
15XV65LXV
16XVI66LXVI
17XVII67LXVII
18XVIII68LXVIII
19XIX69LXIX
20XX70LXX
21XXI71LXXI
22XXII72LXXII
23XXIII73LXXIII
24XXIV74LXXIV
25XXV75LXXV
26XXVI76LXXVI
27XXVII77LXXVII
28XXVIII78LXXVIII
29XXIX79LXXIX
30XXX80LXXX
31XXXI81LXXXI
32XXXII82LXXXII
33XXXIII83LXXXIII
34XXXIV84LXXXIV
35XXXV85LXXXV
36XXXVI86LXXXVI
37XXXVII87LXXXVII
38XXXVIII88LXXXVIII
39XXXIX89LXXXIX
40XL90XC
41XLI91XCI
42XLII92XCII
43XLIII93XCIII
44XLIV94XCIV
45XLV95XCV
46XLVI96XCVI
47XLVII97XCVII
48XLVIII98XCVIII
49XLIX99XCIX
50L100C

Important Notes [1 to 100]

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

NumberRoman Numeral
100C
200CC
300CCC
400CD
500D
600DC
700DCC
800DCCC
900CM
1000M

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.

Roman Numbers Counting Chart

Conversion of Simple Numbers into Roman

Break down the number in terms of 1, 5, 10, 50, 100, 500, and 1000 and write roman symbols accordingly. Below are given some examples to help you understand.

1510501005001000
IVXLCDM
  • 89 In Romon=50+10+10+10+9(10-1)=LXXXIX
  • 230 In Romon=100+100+10+10+10=CCXXX
  • 2020 In Romon=1000+1000+10+10=MMXX
  • 2021 In Romon=1000+1000+10+10+1=MMXXI
  • 2022 In Romon=1000+1000+10+10+1+1=MMXXII
  • 2023 In Romon=1000+1000+10+10+1+1=MMXXIII
  • 1550 In Romon=1000+500+50=MDL
  • 1234 In Romon=1000+100+100+10+10+10+4(5-1)=MCCXXXIV
  • 999 In Romon=900(1000-100)+90(100-10)+9(10-1)=CMXCIX
  • 3214 In Romon=1000+1000+1000+100+100+10+4(5-1)=MMMCCXIV

Also learn Hindi Numbers counting in an easy way.


Faq’s – Roman Number Counting

  1. How to write 9 in Roman numerals?

    Convert the number into the terms 1 and 10 i.e. I and X.
    Then Subtract 1 from 10 i.e. X-I =IX
    Hence, 9=IX

  2. How to write 50 in Roman numerals?

    Number 50 is represented by “L” in Romans. Hence, 50=L

  3. 2020 & 2021 in roman numeral?

    2020= 1000+1000+10+10=MMXX
    2021= 1000+1000+10+10+1=MMXXI

  4. 100 in roman numeral?

    Number 100 is represented by “c” in Romans. Hence, 100=C

  5. What is “M” represents in roman numbers?

    The symbol “M” represents “1000” in Roman numerals. Hence, M=1000

  6. 49 in Roman numbers?

    Break down the number into the terms of 1, 10, 50 i.e. I, X, L.
    Since 49=40(50-10)+9(10-1)=XLIX

3 thoughts on “Roman Numbers Guide [Complete] + Conversion Rules”

  1. These are used to represent the numbers 1, 5, 10, 50, 100, 500, and 1000. Every number can be decomposed in order to express it as a Roman numeral. What are the Basic Rules to Write Roman Numerals?

    Reply

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