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Roman Numeral Converter

1 in Roman Numerals

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

1 in Roman numeralsI
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1 in Roman numerals is I. 1 is a single I. It is one of the seven basic symbols. In lowercase it is i, and the number is one. I is the first Roman numeral. There is no symbol for zero, so nothing comes before it.

How I is built

  1. ones1 = 1 → I

    1 is a single I.

What sets I apart

I repeats and subtracts
I may be repeated up to three times, III being 3, and it can stand before V and X to subtract: IV is 4 and IX is 9.
Doubled: 2
Double it and you reach 2 (II): every letter of I simply doubles.
Times ten
Multiply by ten and each letter moves up one rank: I becomes X, the numeral for 10.

Where you see I

Sport

Super Bowl I was played on January 15, 1967, in Los Angeles, where the Green Bay Packers beat the Kansas City Chiefs 35–10. Wikipedia The Games of the I Olympiad were the 1896 Summer Olympics in Athens. Wikipedia

Kings, queens and popes

Elizabeth I was Queen of England from 1558 to 1603. Wikipedia

Films, games, books and software

Star Wars: Episode I – The Phantom Menace was released in 1999. Wikipedia

Events and history

The First World War, known as World War I, lasted from 1914 to 1918. Wikipedia

Systems numbered with I

Cranial nerve I is the olfactory nerve, which carries the sense of smell. Wikipedia

Numbers near 1

Roman numeral rules

1 written in Roman numerals as I, built from grid cells
1 = I