In Roman numerals converter: transform Arabic numbers

In Roman numerals online converter

Learn how to convert to Roman numerals:

1: Break the number (decompose it) into place value subgroups;

2: Convert each subgroup;

3: Wrap up the Roman numeral.

Latest conversions of numbers to Roman numerals

2,011,981 = (M)(M)(X)MCMLXXXI Sep 20 11:05 UTC (GMT)
18 = XVIII Sep 20 11:05 UTC (GMT)
9 = IX Sep 20 11:05 UTC (GMT)
1,988 = MCMLXXXVIII Sep 20 11:05 UTC (GMT)
11 = XI Sep 20 11:05 UTC (GMT)
14 = XIV Sep 20 11:05 UTC (GMT)
15 = XV Sep 20 11:05 UTC (GMT)
803,740 = (D)(C)(C)(C)MMMDCCXL Sep 20 11:05 UTC (GMT)
10 = X Sep 20 11:05 UTC (GMT)
17,701 = (X)(V)MMDCCI Sep 20 11:05 UTC (GMT)
490 = CDXC Sep 20 11:05 UTC (GMT)
2,013 = MMXIII Sep 20 11:05 UTC (GMT)
5 = V Sep 20 11:05 UTC (GMT)
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The set of basic symbols in the Roman system of writing numerals

The major set of symbols on which the rest of the Roman numberals were built:

  • 1 = I (one); 5 = V (five); 10 = X (ten); 50 = L (fifty); 100 = C (one hundred); 500 = D (five hundred); 1,000 = M (one thousand)
  • (*) 5,000 = (V) (five thousand); (*) 10,000 = (X) (ten thousand); (*) 50,000 = (L) (fifty thousand); (*) 100,000 = (C) (one hundred thousand ); (*) 500,000 = (D) (five hundred thousand); (*) 1,000,000 = (M) (one million)

(*) Number was also written with a bar above or between two vertical bars. We prefer writing in brackets because it is more accessible to computer users and also removes any ambiguity between a vertical bar | and a Roman numeral I.

Romans did not use numbers higher than 3,999 right from the beginning, they were having no representation for numbers like 5,000, 10,000, 50,000, 100,000, 500,000, 1,000,000. These were later added and for them various different notations were used, not necessarily the ones above. Thus, initially, the maximum number that could be written with Roman numerals was: MMMCMXCIX (3,999).

Roman numerals basic reading rules