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 Representation	Number
I	1
V	5
X	10
L	50
C	100
D	500
M	1,000

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.

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

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.

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

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

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

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.

1	5	10	50	100	500	1000
I	V	X	L	C	D	M

• 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.

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Faq’s – Roman Number Counting