ROMAN NUMERAL
EXAMPLES
Explore common decimal to Roman numeral conversions with detailed explanations. These examples will help you understand the patterns and rules.
COMMON CONVERSIONS
1=I
The basic unit
4=IV
Subtraction: V - I = 5 - 1 = 4
5=V
Basic symbol for five
9=IX
Subtraction: X - I = 10 - 1 = 9
10=X
Basic symbol for ten
27=XXVII
XX + V + II = 20 + 5 + 2 = 27
40=XL
Subtraction: L - X = 50 - 10 = 40
50=L
Basic symbol for fifty
90=XC
Subtraction: C - X = 100 - 10 = 90
100=C
Basic symbol for one hundred
400=CD
Subtraction: D - C = 500 - 100 = 400
500=D
Basic symbol for five hundred
900=CM
Subtraction: M - C = 1000 - 100 = 900
1000=M
Basic symbol for one thousand
1994=MCMXCIV
M + CM + XC + IV = 1000 + 900 + 90 + 4
2025=MMXXV
MM + XX + V = 2000 + 20 + 5
3999=MMMCMXCIX
The largest standard Roman numeral
HISTORICAL YEARS
Roman numerals are commonly used for years, especially in formal contexts like movie credits, building inscriptions, and historical documents.
2025MMXXV
Current year
2000MM
Millennium
1776MDCCLXXVI
American Independence
1969MCMLXIX
Moon landing
1492MCDXCII
Columbus voyage