Roman Numerals Converter

Use this to easily convert regular numerals (Arabic) to Roman numerals.

Roman Numerals Converter

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Information About the Roman Numerals Converter

The Roman numerals converter allows you to convert "regular" numerals between 0–3999 to Roman numerals or vice versa.

Roman Numerals

The Roman numerals are based on the letters I, V, X, L, C, D and M, each of which represents a particular value. They can be combined to form any number. Today, Roman numerals are usually only used to indicate ordinal numbers.

Character Value Name
I 1 unus
V 5 quinque
X 10 decem
L 50 quinquaginta
C 100 centum
D 500 quingenti
M 1000 mille

The same characters are combined to form numbers between individual characters. For example, the number two in Roman numerals is II and three is III. The general rule is that no more than three of the same character can be combined, so four is IV, or one subtracted from five. Five is V and six is VI, one added to five. The basic rule is that a smaller character to the left of a greater character is subtracted from the greater one, while one on the right is added to it. However, the Romans themselves did not always follow this principle and exceptional forms, such as IIII (4) or even IIX (8) are common. The form IIII is common on clocks even today. The following list of the first ten numbers helps you to grasp the idea.:

  • I: one
  • II: two
  • III: three
  • IV: four
  • V: five
  • VI: six
  • VII: seven
  • VIII: eight
  • IX: nine
  • X: ten

Sources and more information
  1. Wikipedia: roman numerals