# How to Convert Roman Numerals

Roman numerals is a system of numbers which uses the letters of the alphabet.^{[1]} It is still occasionally used today, especially when representing years.

## Steps

- 1
**Know which letters stand for which numbers.**- I is 1, V is 5.
- X is 10, L is 50.
- C is 100, D is 500.
- M is 1000.

- 2
**Locate the largest symbol within the number.**This should be either the first or the second symbol. - 3
**If the largest symbol appears first, count how many times it appears in an uninterrupted row.**This should be between one and three times. Multiply its value by the number of appearances and add this amount to the total. - 4
**If the largest symbol appears second, subtract the value of the symbol before it from its value.**Add this amount to the total. - 5
**Repeat steps 2-4 with the numbers you have not yet accounted for.** - 6
**Add up the values of each set of numbers to find the total value of the entire numeral.**

## Tips

- In modern Roman numerals, the following rules apply:
- Only I, X, C and M may be repeated, and each no more than three times in sequence.
- A large symbol can only require one smaller symbol to be subtracted from it at a time.
- Only I, X and C may be subtracted, and each only from values up to and including the next highest of the repeatable symbols.

- Older styles of writing Roman numerals may break the above rules.

## Sources and Citations

## Article Info

Categories: Mathematics | Conversion Aids