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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 |
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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