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Hexadecimal to Denary Conversion Practice

Convert 3D from hexadecimal to denary:

3D16

=  
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Step 1: Split the Bits

Split the two hexadecimal numbers into single digits.

3D
 
3 D

Step 2: Convert Digits to Denary

Convert each digit to denary.

For numbers 0 – 9, it will be the same. For numbers A – F, use 10 – 15.

3=3

3 less than 10, so it is the same in hexadecimal and denary.

D=13

D in hex is equivalent to 13 in denary.


Step 3: Convert to Binary Nibbles

Convert each denary digit into a nibble (a four-bit binary number).

3 =

8 4 2 1
0011

13 =

8 4 2 1
1101

Step 4: Join into a Byte

Put our two binary nibbles together to create one byte.

Remember to re-number the binary columns for the first nibble.

128 64 32 16   8 4 2 1
0011 1101

Step 5: Convert Binary to Denary

Finally, convert the whole binary byte into a decimal number.

128 64 32 16 8 4 2 1
00111101

32 + 16 + 8 + 4 + 1 = 61


The answer

We have now converted 3D16 to 6110.

61