Number systems include the decimal system, the binary system and the octal system. These numbers can be easily converted into all other number systems. Roman numerals also belong to these systems and formats.

Table

DecimalOctal systemHexadecimalBinary code
00000000000
11100000001
22200000010
33300000011
44400000100
55500000101
66600000110
77700000111
810800001000
911900001001
1012A00001010
1113B00001011
1214C00001100
1315D00001101
1416E00001110
1517F00001111
16201000010000
17211100010001
18221200010010
19231300010011
20241400010100
21251500010101

Binary to decimal

Convert binary code to decimal - Convert numbers

Binary to decimal

Hexadecimal to decimal

Convert hexadecimal to decimal - Hexadecimal system

Hexadecimal to decimal

Octal to decimal

Convert octal numbers to decimal numbers - Octal to decimal

Octal to decimal

Roman numerals

Convert Roman numerals to decimal numbers

Roman numerals
On this website, calculations, formulas and sample calculations with simple explanations are provided online free of charge by the author.