Convert any number to Roman numerals or decode any Roman numeral back to a number. Includes a step-by-step breakdown, common year converter, and full Roman numeral reference chart.
Convert Roman Numerals
ROMAN NUMERAL
MMXXVI
MM (2000) + XX (20) + VI (6)
NUMBER
2026
MM (2000) + XX (20) + VI (6) = 2026
Click any year or enter your own:
YEAR IN ROMAN NUMERALS
MMXXVI
Notable years:
Roman numeral reference chart:
I
1
IV
4
V
5
IX
9
X
10
XL
40
L
50
XC
90
C
100
CD
400
D
500
CM
900
M
1000
How Roman Numerals Work
Roman numerals use seven letters, each representing a value. Numbers are formed by combining these symbols following two rules: values are generally written largest to smallest left to right, and a smaller value placed before a larger value is subtracted.
I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000
Additive rule: VIII = 5+1+1+1 = 8
Subtractive rule: IV = 5−1 = 4, IX = 10−1 = 9, XL = 50−10 = 40, XC = 100−10 = 90, CD = 500−100 = 400, CM = 1000−100 = 900
The subtractive rule only applies to specific combinations — never VC, LC, or DM, for example. Only the six combinations above (IV, IX, XL, XC, CD, CM) use subtraction.
Where Roman numerals are used today
Movie and TV sequel numbering (Rocky IV, Star Wars Episode IX)
Super Bowl numbers (Super Bowl LIX)
Clock faces and watch dials
Book chapters, outlines, and legal document sections
Building cornerstones showing construction year
Olympiad numbering (XXXIII Olympics = Paris 2024)
Monarchs and popes (King Charles III, Pope Francis I)
Frequently Asked Questions
What is the largest Roman numeral?
The traditional Roman numeral system goes up to 3,999 (MMMCMXCIX). Numbers 4,000 and above require a bar over a numeral (called vinculum) to multiply by 1,000, but this is rarely used. Our converter covers 1–3,999.
Why don't Roman numerals have a zero?
The Romans didn't need zero for their purposes — counting and trading. The concept of zero as a number was developed independently by Babylonian, Indian, and Mayan mathematicians. The Roman numeral system predates the widespread use of zero in Europe, which came through Arabic mathematics in the Middle Ages.
What year is MCMXCIX?
MCMXCIX = 1999. M=1000, CM=900, XC=90, IX=9. Total: 1000+900+90+9 = 1999. This is one of the most complex Roman numeral expressions for a recent year.