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Convert 321 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 >= 321

20 = 1

21 = 2

22 = 4

23 = 8

24 = 16

25 = 32

26 = 64

27 = 128

28 = 256

29 = 512 <--- Stop: This is greater than 321

Since 512 is greater than 321, we use 1 power less as our starting point which equals 8

Build binary notation

Work backwards from a power of 8

We start with a total sum of 0:

28 = 256

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

Multiplying this coefficient by our original value, we get: 1 * 256 = 256

Add our new value to our running total, we get:
0 + 256 = 256

This is <= 321, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 256

Our binary notation is now equal to 1

27 = 128

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

Multiplying this coefficient by our original value, we get: 1 * 128 = 128

Add our new value to our running total, we get:
256 + 128 = 384

This is > 321, so we assign a 0 for this digit.

Our total sum remains the same at 256

Our binary notation is now equal to 10

26 = 64

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

Multiplying this coefficient by our original value, we get: 1 * 64 = 64

Add our new value to our running total, we get:
256 + 64 = 320

This is <= 321, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 320

Our binary notation is now equal to 101

25 = 32

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

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

Add our new value to our running total, we get:
320 + 32 = 352

This is > 321, so we assign a 0 for this digit.

Our total sum remains the same at 320

Our binary notation is now equal to 1010

24 = 16

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

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

Add our new value to our running total, we get:
320 + 16 = 336

This is > 321, so we assign a 0 for this digit.

Our total sum remains the same at 320

Our binary notation is now equal to 10100

23 = 8

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

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

Add our new value to our running total, we get:
320 + 8 = 328

This is > 321, so we assign a 0 for this digit.

Our total sum remains the same at 320

Our binary notation is now equal to 101000

22 = 4

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

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

Add our new value to our running total, we get:
320 + 4 = 324

This is > 321, so we assign a 0 for this digit.

Our total sum remains the same at 320

Our binary notation is now equal to 1010000

21 = 2

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

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

Add our new value to our running total, we get:
320 + 2 = 322

This is > 321, so we assign a 0 for this digit.

Our total sum remains the same at 320

Our binary notation is now equal to 10100000

20 = 1

The highest coefficient less than 1 we can multiply this by to stay under 321 is 1

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

Add our new value to our running total, we get:
320 + 1 = 321

This = 321, so we assign our outside coefficient of 1 for this digit.

Our new sum becomes 321

Our binary notation is now equal to 101000001

Final Answer

We are done. 321 converted from decimal to binary notation equals 1010000012.


What is the Answer?

We are done. 321 converted from decimal to binary notation equals 1010000012.

How does the Base Change Conversions Calculator work?

Free Base Change Conversions Calculator - Converts a positive integer to Binary-Octal-Hexadecimal Notation or Binary-Octal-Hexadecimal Notation to a positive integer. Also converts any positive integer in base 10 to another positive integer base (Change Base Rule or Base Change Rule or Base Conversion)
This calculator has 3 inputs.

What 3 formulas are used for the Base Change Conversions Calculator?

Binary = Base 2
Octal = Base 8
Hexadecimal = Base 16

For more math formulas, check out our Formula Dossier

What 6 concepts are covered in the Base Change Conversions Calculator?

basebase change conversionsbinaryBase 2 for numbersconversiona number used to change one set of units to another, by multiplying or dividinghexadecimalBase 16 number systemoctalbase 8 number system

Example calculations for the Base Change Conversions Calculator

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