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Advanced Roman Numerals Converter
Enter a whole number such as 2003, or
a Roman numeral such as MMIII,
then click Convert.
The input must be in the range of 1 -
4999, or I to MMMMCMXCIX.
The Basics
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A smaller number in
front of a larger number means subtraction,
all else means addition. For example,
IV means
4, VI means 6. You would not put more than one smaller
number in front of a larger number
to subtract. For example, IIV would not mean 3. You must separate ones, tens, hundreds,
and thousands as separate items. That
means that 99 is XCIX, 90 + 9, but never should be
written as IC.
Similarly, 999 cannot be IM
and 1999 cannot be MIM. |
| I |
The numeral one. II is two, III is three. You seldom see IIII as 4, since IV can also mean 4, plus its shorter
to write. |
| V |
The numeral 5. IV is 4, VI is 6, VII is 7, VIII is 8. |
| X |
The numeral 10. IX is 9, XI is 11, etc. |
| L |
The numeral 50. XL would be 40. |
| C |
The numeral 100. Think
of Century having a hundred years. C
is short for the Latin word Centum,
but that's not to easy to remember. |
| D |
The numeral 500. |
| M |
The numeral 1000. |
| Sometimes you
will see a numeral with a line over
it. That means to multiply it by 1000.
A numeral V
with a line over it means 5000. |
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