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Roman Numeral Converter

XII Roman Numeral: What Number Is XII?

Numbers and numerals are detected as you type. Enter copies, Alt+S swaps.

XII as a number12
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XII is 12 (twelve). It is one X and two Is, all added: 10 + 1 + 1 = 12.

Reading XII letter by letter

XII splits by place into X (ten) and II (two).

LetterValueStepTotal
X10start10
I1add11
I1add12

Why XII is valid

Two Is in a row
One below the limit of three.

Easy to confuse with XII

TypedProblemReads as
IXILetters are out of order: values must go from largest to smallest.X (10)

XII in names, titles and systems

  • ReignPope Pius XIIled the Catholic Church1939–1958Wikipedia
  • Super BowlSuper Bowl XIIJanuary 15, 1978New OrleansDallas Cowboys beat Denver Broncos 27–10Wikipedia
  • TitleFinal Fantasy XII2006Wikipedia
  • OlympicsGames of the XII Olympiad1940cancelledWikipedia
  • EventWrestleMania XII1996Wikipedia
  • Clock facedial shows XIIXII sits at the top of a Roman-numeral clock faceWikipedia

12 in Roman numerals · Roman numeral rules

The Roman numeral XII built from grid cells, equal to 12
XII = 12