A Gigabyte is equal to

Concept — Digital storage units form a binary ladder. Because computer memory is addressed in powers of two, each unit on the ladder is 1024 = 210 times the unit immediately below it, and the ladder runs byte → kilobyte → megabyte → gigabyte → terabyte.

• 1 kilobyte (KB) = 1024 bytes = 210 bytes

• 1 megabyte (MB) = 1024 KB = 220 bytes

• 1 gigabyte (GB) = 1024 MB = 230 bytes

• 1 terabyte (TB) = 1024 GB = 240 bytes

Application — The gigabyte sits exactly one rung above the megabyte, so its size follows from the ladder in three short steps.

1. Step down one rung from the gigabyte: 1 GB = 1024 × 1 MB = 1024 megabytes.

2. Expand the megabyte in turn: 1024 MB = 1024 × 1024 KB = 1,048,576 KB.

3. Expand once more to bytes: 1,048,576 × 1024 = 230 = 1,073,741,824 bytes.

Cross-check — reading the same ladder against the other quantities offered:

So 1024 megabytes is the only quantity that lands exactly on the gigabyte rung.

Note — storage and network vendors often use the decimal SI convention, in which 1 GB = 109 bytes and the binary 230-byte quantity is called a gibibyte (GiB). Competitive exams such as UGC NET use the classical binary convention, 1 GB = 1024 MB.