Roman numerals were invented by the Romans as a counting system to make trading goods easier. So which letters did they choose to represent numbers? Well, the Romans used seven different letters to represent seven numbers.

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

These letters are then combined to make other numbers. For example, the number 18 is made accordingly: X (10) + V (5) + III (3).

For more examples visit our main Roman Numerals page.