Roman Numerals

Roman numerals are written as combinations of the seven letters in the table below. The letters can be written as capital (XVI) or lower-case letters (xvi).

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

You can use a roman numerals chart or conversion table to lookup roman numerals or you can easily learn how to calculate them yourself with a few simple rules.

How to Translate Roman Numerals

If smaller numbers follow larger numbers, the numbers are added. If a smaller number precedes a larger number, the smaller number is subtracted from the larger. For example, if you want to say 1,100 in Roman Numerals, you would say M for 1000 and then put a C after it for 100; in other words 1,100=MC in Roman Numerals.

Some more examples:

  • VIII = 5+3 = 8
  • IX = 10-1 = 9
  • XL = 50-10 = 40
  • XC = 100-10 = 90
  • MCMLXXXIV = 1000+(1000-100)+50+30+(5-1) = 1984
Roman Numeral Table
1 I 14 XIV 27 XXVII 150 CL
2 II 15 XV 28 XXVIII 200 CC
3 III 16 XVI 29 XXIX 300 CCC
4 IV 17 XVII 30 XXX 400 CD
5 V 18 XVIII 31 XXXI 500 D
6 VI 19 XIX 40 XL 600 DC
7 VII 20 XX 50 L 700 DCC
8 VIII 21 XXI 60 LX 800 DCCC
9 IX 22 XXII 70 LXX 900 CM
10 X 23 XXIII 80 LXXX 1000 M
11 XI 24 XXIV 90 XC 1600 MDC
12 XII 25 XXV 100 C 1700 MDCC
13 XIII 26 XXVI 101 CI 1900 MCM

A Brief History of Roman Numerals

What is the history of Roman Numerals? Roman numerals, as the name suggests, originated in ancient Rome. No one is sure when roman numerals were first used, but they far predate the middle ages. Theories abound as to the origins of this counting system, but it is commonly believed to have started with the ancient Etruscans. The symbol for one in the roman numeral system probably represented a single tally mark of the kind people would notch into wood or dirt to keep track of items or events they were counting.

Where are Roman Numerals Used in Modern Times?

Roman Numbers are still used today in a variety of applications. If you are creating an outline for a story or report, you will be expected to use Roman Numerals. They are also commonly used on clocks and watches to number book chapters, films and big events. Monarchs and Popes are usually numbered with this system as are guitar chords and the cranial nerves.

Roman Numerals in Crosswords

Crossword puzzle creators are fond of using Roman Numerals in their puzzles, ranging from requiring translation of complex numbers to expecting puzzlers to know that a Roman Numeral M stands for one thousand. If you want to be an expert crossword puzzler, you probably need to get familiar with the roman numeral conversion process or keep a conversion chart handy. A typical crossword clue is "Half of MCIV" which should be answered "DLII".

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