Powers of Two With Common Designations

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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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