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Convert 38 from decimal to binary

(base 2) notation:

Power Test

Raise our base of 2 to a power

Start at 0 and increasing by 1 until it is >= 38

20 = 1

21 = 2

22 = 4

23 = 8

24 = 16

25 = 32

26 = 64 <--- Stop: This is greater than 38

Since 64 is greater than 38, we use 1 power less as our starting point which equals 5

Build binary notation

Work backwards from a power of 5

We start with a total sum of 0:


25 = 32

The highest coefficient less than 1 we can multiply this by to stay under 38 is 1

Multiplying this coefficient by our original value, we get: 1 * 32 = 32

Add our new value to our running total, we get:
0 + 32 = 32

This is <= 38, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 32

Our binary notation is now equal to 1


24 = 16

The highest coefficient less than 1 we can multiply this by to stay under 38 is 1

Multiplying this coefficient by our original value, we get: 1 * 16 = 16

Add our new value to our running total, we get:
32 + 16 = 48

This is > 38, so we assign a 0 for this digit.

Our total sum remains the same at 32

Our binary notation is now equal to 10


23 = 8

The highest coefficient less than 1 we can multiply this by to stay under 38 is 1

Multiplying this coefficient by our original value, we get: 1 * 8 = 8

Add our new value to our running total, we get:
32 + 8 = 40

This is > 38, so we assign a 0 for this digit.

Our total sum remains the same at 32

Our binary notation is now equal to 100


22 = 4

The highest coefficient less than 1 we can multiply this by to stay under 38 is 1

Multiplying this coefficient by our original value, we get: 1 * 4 = 4

Add our new value to our running total, we get:
32 + 4 = 36

This is <= 38, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 36

Our binary notation is now equal to 1001


21 = 2

The highest coefficient less than 1 we can multiply this by to stay under 38 is 1

Multiplying this coefficient by our original value, we get: 1 * 2 = 2

Add our new value to our running total, we get:
36 + 2 = 38

This = 38, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 38

Our binary notation is now equal to 10011


20 = 1

The highest coefficient less than 1 we can multiply this by to stay under 38 is 1

Multiplying this coefficient by our original value, we get: 1 * 1 = 1

Add our new value to our running total, we get:
38 + 1 = 39

This is > 38, so we assign a 0 for this digit.

Our total sum remains the same at 38

Our binary notation is now equal to 100110


Final Answer


We are done. 38 converted from decimal to binary notation equals 1001102.