Convert 40 to a Roman Numeral

What is 40 in Roman numerals? How do you write 40 as a Roman numeral?
Enter a normal number into the box and it will be converted automatically.
40 = XL
Click here for the opposite calculation
Roman Numeral Symbols
Symbol Number
I 1
V 5
X 10
L 50
C 100
D 500
M 1,000
Symbol Number
V 5,000
X 10,000
L 50,000
C 100,000
D 500,000
M 1,000,000

Learn more about Roman Numerals