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, VÌ… = 5 000, VÌ…IÌ… = 6 000, VÌ…IÌ…IÌ… = 7000, ... , XÌ… = 10000, XÌ…XÌ…DÌ… = 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 2241 to Roman Numerals.

Break 2241 into 2000, 200, 40 and 1, then do each conversion

2000 = MM
200 = CC
40 = XL
1 = I

So, 2241 = MMCCXLI

Roman to Arabic Numerals Chart Hundreds

C100One hundred
CC200Two hundred
CCC300Three hundred
CD400Four hundred
D500Five hundred
DC600Six hundred
DCC700Seven hundred
DCCC800Eight hundred
CM900Nine hundred

Roman to Arabic Numerals Chart - Thousands

M1000One thousand
MM2000Two thousand
MMM3000Three thousand
MMMMM 4000Four thousand
MMMMM 5000Five thousand
MMMMMMetc.

Roman to Arabic numerals from 1 to 100 by - Tens

X10
XX20
XXX30
XL40
L50
LX60
LXX70
LXXX80
XC90
C100