In
hexadecimal number system we use 16 different digits so its base is 16. List of
all hexadecimal digits:
Hexadecimal digit

Decimal equivalent

Binary equivalent

0

0

0000

1

1

0001

2

2

0010

3

3

0011

4

4

0100

5

5

0101

6

6

0110

7

7

0111

8

8

1000

9

9

1001

A

10

1010

B

11

1011

C

12

1100

D

13

1101

E

14

1110

F

15

1111

To convert the binary number into hexadecimal number:
Make the group of four binary digits from right to
left and replace the four binary digits with the equivalent hexadecimal digit
using above table.
For example:
Binary number = 11000111110101
Group
of four digits from right side:
to make group of four digit of left most digit 11 , add two zero at the left side i.e.
0011
Now put or replace with it the equivalent hexadecimal digit using above
table
So, equivalent hexadecimal number will be 31F5