# Roman MCDI - Roman to Arabic Numerals Converter

### Roman to Arabic Numerals Calculator

Convert from Roman to Arabic Numerals. Here is the answer to the question: Roman MCDI or MCDI in Arabic Numrerals.

Use this Roman Numerals converter to compute any Roman number between I and MMMMCMXCVIII to Arabic numerals.

## How to Convert to Roman Numerals

The Roman numerals are represented

by the following letters:

- I = 1
- V = 5
- X = 10
- L = 50
- C = 100
- D = 500
- M = 1000

- If a numeral is followed by another numeral of lower denomination, the two are added together;
- if it is preceded by one of lower denomination, the smaller numeral is subtracted from the greater.

Thus XI = 11 (X + I), but IX = 9 (X – I).

Other examples are XXC = 80, CXL = 140, XV = 15, XLVIII = 48.

Thousands from 1000 to 9000 are represented as: M, MM, MMM,MMMM, MMMMM, MMMMMM, MMMMMMM, MMMMMMMM, MMMMMMMMM.

Multiples of a thousand are also/alternatively indicated by a superior bar: thus, V̅ = 5 000, V̅I̅ = 6 000, V̅I̅I̅ = 7000, ... , X̅ = 10000, X̅X̅D̅ = 480 000, etc.

## How to read a Roman Numeral

Break the number into Thousands, Hundreds, Tens and Units and write down each in turn.

Example: Convert 1989 to Roman Numerals.

Break 1989 into 1000, 900, 80 and 9, then do each conversion

- 1000 = M
- 900 = CM
- 80 = LXXX
- 9 = IX
- So, 1989 = MCMLXXXIX

## Roman to Arabic Numerals Chart Hundreds

C | 100 | One hundred |

CC | 200 | Two hundred |

CCC | 300 | Three hundred |

CD | 400 | Four hundred |

D | 500 | Five hundred |

DC | 600 | Six hundred |

DCC | 700 | Seven hundred |

DCCC | 800 | Eight hundred |

CM | 900 | Nine hundred |

## Roman to Arabic Numerals Chart - Thousands

M | 1000 | One thousand |

MM | 2000 | Two thousand |

MMM | 3000 | Three thousand |

MMMMM | 4000 | Four thousand |

MMMMM | 5000 | Five thousand |

MMMMMM | etc. |

## Roman to Arabic numerals from 1 to 100 by - Tens

X | 10 |

XX | 20 |

XXX | 30 |

XL | 40 |

L | 50 |

LX | 60 |

LXX | 70 |

LXXX | 80 |

XC | 90 |

C | 100 |