# Which is the biggest number in Roman numerals?

*Ancient Romans used Latin Letters* (**I, V, X, L, C, D, M**) as their numerals. **The biggest letter in Roman Numerals System is M** (1000). And also remember that you can use only three same letters together in a row. So, the numerals for 4 (IIII) and 9 (VIIII) are represented by IV and IX.

The lowest number you can write in Roman Numerals is number I (1). And the largest numeral is MMMCMXCIX (3999).

On the other hand, using the vinculum which is a mathematical symbol used for grouping, you can multiply the numeral by 1000. For instance, if you want to get 1.000.000, you should draw a line top of the numeral M.

The vinculum was in use in the Middle Ages and this was the way to write numbers higher than 3999 in Roman Numerals System.

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## Recent Comments

The biggest number writable in classic roman numerals is 3999, or in roman numerals MMMCMXCIX

1,000 is M

1 is lowest number

The Roman numeral converter shows 3,999,999 is the biggest it can go, of adding lines up top. So if the roman numerals in quotes below had a line above them (since I can't represent it any other way) :

"MMMDCCCLXXX"MMMDCCCLXXXIII (3,883,883) can exist.

@Hocine It cannot be because the symbols V, L, D CANNOT BE REPEATED.

To answer the questions below, this article is missing one very important rule to make 3999 the maximum representable number.

The roman numerals V, L and D (5, 50 and 500 respectively) cannot be repeated.

This makes combinations such as MMMDDD impossible, thus making MMMCMXCIX the highest possible roman numeral (without grouping).

As you probably noticed above,Roman Numerals only go uo to M (1,000). According to the rules of addition & subtraction,this means that the biggest number we can form is roman numerals is MMMCMXCIX,or 3,999.

according to "https://support.mozilla.org/en-US/questions/1056111" 3,999

Using the same rules the maximum of 3 symbols in a row , so i can write :

MMMDDDCCCLLLXXXIII equals 4983 in decimal system, isn't it ?

All numbers are possible to write because if you keep adding the lines on the numbers it will become bigger e.g. _ _ M = 1 Billion

@Elvis Cabeza,

You cannot make 10,000,000 in Roman Numerals as--3,999,999 = MMMCMXCIXCMXCIX--is the largest possible number you can write.

Using each letter once the highest number IS MDCLXVI Not including the bar over the top.

10,000,000 can't be a roman numerals

MMMDCCCLXXXVIII is greater than MMMCMXCIX (in string length at least)

hey Jake the biggest roman numeral is M with a centrillion lines on top

What’s 10,000,000 in Roman numerals

Is MMMCMXCIX the biggest number you can make using Roman numerals?

What is 0.000001 in Roman numerals?

what is the biggest number you can make from the roman numerals