Memory and storage sized in powers of 1,024 reach 1,073,741,824 bytes at the 2^30 step, equal to 1,024 mebibytes.
Counting Bytes in Powers of 1,024
That total is the binary count used for memory and storage. The decimal counterpart is the Gigabyte (GB). A decimal gigabyte is 10^9 bytes, or 1,000,000,000 bytes. The binary count is about 7.4 percent larger.
Prefixes Named in IEC 80000-13
IEC 80000-13 assigns the prefix gibi, symbol Gi, to 2^30. The same standard names kibi, mebi, gibi, tebi, pebi, exbi, zebi, yobi, robi, and quebi so those binary prefixes are not confused with decimal prefixes.
1,024 gibibytes equal one Tebibyte (TiB), which is 2^40 bytes. The decimal unit at that scale is the Terabyte (TB).
Binary and Decimal Byte Counts
Reading the same steps in powers of 1,024 and in powers of 10 produces different byte totals.
| Unit | Bytes |
| Gibibyte | 1,073,741,824 |
| Gigabyte | 1,000,000,000 |
| Tebibyte | 1,099,511,627,776 |
| Terabyte | 1,000,000,000,000 |
