The 7 Base Symbols

Symbol	Value	Name
I	1	Unus
V	5	Quinque
X	10	Decem
L	50	Quinquaginta
C	100	Centum
D	500	Quingenti
M	1,000	Mille

Subtractive Notation Pairs

Notation	Value	Rule
IV	4	I (1) before V (5) = 5 − 1
IX	9	I (1) before X (10) = 10 − 1
XL	40	X (10) before L (50) = 50 − 10
XC	90	X (10) before C (100) = 100 − 10
CD	400	C (100) before D (500) = 500 − 100
CM	900	C (100) before M (1000) = 1000 − 100

Roman Numerals 1–20

Roman Numerals 21–50

Roman Numerals 51–100

Hundreds: 100–1000

Key Milestones

Number	Roman	Notes

Full Lists

Roman Numerals 1–100 (full list) Roman Numerals 1–1000 (full list) Converter Tool How to Read Roman Numerals