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Powers of Two With Common Designations

The chart below shows the powers of two from 0 to 40. PC numbers tend to be based on powers of 2 because of the way computers use the binary number system to encode information. I have also shown the most common designation used to match to each number, which you can use as a cross-reference if you ever need to know exactly how many bytes 16 MB is, for example. For an explanation of the storage abbreviations, see here.

n

2^n

Common Storage
Designation (Bytes)

0

1

1 byte

1

2

2 bytes

2

4

4 bytes

3

8

8 bytes

4

16

16 bytes

5

32

32 bytes

6

64

64 bytes

7

128

128 bytes

8

256

256 bytes or 0.25 KB

9

512

512 bytes or 0.5 KB

10

1,024

1 KB

11

2,048

2 KB

12

4,096

4 KB

13

8,192

8 KB

14

16,384

16 KB

15

32,768

32 KB

16

65,536

64 KB

17

131,072

128 KB

18

262,144

256 KB or 0.25 MB

19

524,288

512 KB or 0.5 MB

20

1,048,576

1 MB

21

2,097,152

2 MB

22

4,194,304

4 MB

23

8,388,608

8 MB

24

16,777,216

16 MB

25

33,554,432

32 MB

26

67,108,864

64 MB

27

134,217,728

128 MB

28

268,435,456

256 MB or 0.25 GB

29

536,870,912

512 MB or 0.5 GB

30

1,073,741,824

1 GB

31

2,147,483,648

2 GB

32

4,294,967,296

4 GB

33

8,589,934,592

8 GB

34

17,179,869,184

16 GB

35

34,359,738,368

32 GB

36

68,719,476,736

64 GB

37

137,438,953,472

128 GB

38

274,877,906,944

256 GB or 0.25 TB

39

549,755,813,888

512 GB or 0.5 TB

40

1,099,511,627,776

1 TB

Next: Binary and Decimal Byte "Equivalents"


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