Here you will find commonly used and some basic combinations of Roman Numerals with forming rules and big Roman numbers.

1 | 5 | 10 | 50 | 100 | 500 | 1000 |

I | V | X | L | C | D | M |

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |

I | II | III | IV | V | VI | VII | VIII | IX |

10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |

X | XX | XXX | XL | L | LX | LXX | LXXX | XC |

100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |

C | CC | CCC | CD | D | DC | DCC | DCCC | CM |

When a symbol is placed after a greater (or equal) value then it is added.

**Example:**LX = L + X = 50 + 10 = 60

Similarly, when a symbol is placed before a greater value then it is subtracted.

**Example:**XC = C - X = 100 - 10 = 90

**Note:** Do not use the same symbol more than three times in one row. But sometimes **IIII** is used to show 4 in clocks.

Arabic numbers more than 1000 are defined by placing a bar (─) over the symbol or letter. Also, it multiplies its value by 1000.

5000 | 10000 | 50000 | 100000 | 500000 | 1000000 |

V | X | L | C | D | M |

Roman Numerals are the ancient Roman way of representing numbers. Just like today as we have the modern numeral system, Romans had their own system of representing numbers. It's one of the oldest ways but still, it's widely used. You can easily find their extensive use in mathematical expressions, scientific notations, and much more.

In the Roman Number System, each number has its unique symbol. There are also some calculation rules and signs. You can see this in detail in our chart. Also, you should learn about other historical things such as Greek Letters, ASCII Table, and ALT Codes.

The number system that we use all the time is Hindu-Arabic numerals. These are the set of 10 numbers - 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0. Also, it is inspired by Roman numerals. You can notice the similarity when you compare both systems side by side. However, Hindu-Arabic is a more efficient and convenient way of writing. Also, the Roman system has its own advantages too.

Let's take an example to understand the conversion process. To successfully convert a number into its equivalent Roman form, you will need the Roman Numerals Chart. So, keep it handy or you can memorize it.

Firstly, let's break the number into Thousands, Hundreds, Tens, and Ones and do each conversion.

- 1000 ➔ M
- 300 ➔ CCC
- 80 ➔ LXXX
- 5 ➔ V

Now write all together:

1000 + 300 + 80 + 5 = M + CCC + LXXX + V

So, **1385 ➔ MCCCLXXXV**

Try your own examples to get acquainted with this technique. However, the Roman Numerals Converter makes the job simple. Just enter the number and press the convert button. You will get the result in less than a second.

The process for converting a Roman symbol to an arabic number is the same. There are just a few small changes that you need to take care of. Let's understand this clearly with an example.

Firstly, let's break all the letters and write them down respectively. Then convert each letter into a number.

- X ➔ 10
- X ➔ 10
- V ➔ 5
- I ➔ 1

Now, sum up all the values: 10 + 10 + 5 + 1 = 26

Hence, the number form of XXVI is **26**.