Roman Numerals Basics and How to Convert Numerals to Numbers

roman numerals converter

This post was most recently updated on January 20th, 2023

Roman numerals are a system of numerical notation used in ancient Rome. They are based on the use of the letters of the alphabet, with certain letters representing certain values. The basic symbols in the Roman Numerals Converter are I, V, X, L, C, D, and M, which represent the values 1, 5, 10, 50, 100, 500, and 1,000, respectively.

To form numbers using Roman numerals, the symbols are combined and arranged in descending order of value, with the highest-value symbols coming first. For example, the number 12 is written as XII, with the X representing 10 and the two I’s representing 2. Similarly, the number 42 is written as XLII, with the L representing 50 and the X and two I’s representing the remaining 2.

One important rule to keep in mind when writing Roman numerals converter is that a symbol can only be repeated up to three times in a row. Additionally, when a smaller value symbol is placed before a larger value symbol, it is subtracted from the larger value. For example, the number 9 is written as IX, with the I representing 1 and the X representing 10. The I is placed before the X, indicating that it should be subtracted from the X, resulting in the value of 9.

Use Of Roman Numerals:

Roman numerals were widely used in ancient Rome and continue to be used today in certain contexts, such as on clock faces, book chapter titles, and movie sequels. However, because the Roman numeral system does not include a symbol for zero and does not have a convenient way to represent decimal fractions, it has largely been replaced by the more versatile Hindu-Arabic numeral system in most applications.

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It is also worth noting that Roman numerals notation have several special rule, which in Roman times was always written by scribes who knew the conventions very well and had little trouble reading or writing them. But for someone who is not familiar with the language, it can be difficult to understand these numerals.

How to Convert Numerals to Numbers or Decimals

To convert Roman numerals to decimal numbers, one can simply add up the values of the individual symbols, taking into account the rules of subtractive notation. To convert decimal numbers to Roman numerals, You can use the roman numerals number and the process is somewhat more complex.

One approach is to use a table of Roman numeral equivalents and subtract the largest possible value from the decimal number until the number is reduced to zero. Another approach is to use a process of repeated division and modulus to find the Roman numeral equivalents of the digits in the decimal number.


In conclusion, Roman numerals are an important and interesting aspect of the history of mathematics and culture. They have been widely used throughout history, and continue to be used in many areas today. Understanding Roman numerals converter can be educational and beneficial, as it helps to better understand the decimal system and the concepts of addition, subtraction, and mental arithmetic. The Roman numeral system is an excellent example of how different cultures have created their own ways of representing numbers, and it remains an important part of our mathematical heritage