A digital storage converter changes a data size from one unit into another — megabytes to gigabytes, or bits to bytes. It answers the everyday questions behind file sizes, drive capacities, phone storage and download limits. This tool covers bits and bytes through kilobytes, megabytes, gigabytes, terabytes and petabytes.
The formula. Every value passes through one base unit, the byte, and this converter uses binary (1024-based) steps: 1 byte = 8 bits, 1 KB = 1,024 bytes, 1 MB = 1,024 KB, 1 GB = 1,024 MB and 1 TB = 1,024 GB. This is how Windows, RAM and most software report sizes. Drive manufacturers instead use decimal steps of 1,000, which is exactly why a "1 TB" disk shows up as roughly 931 GB in your file manager — nothing is missing, the two sides are simply counting differently.
Worked example. A 4.7 GB DVD image is 4.7 × 1,024 = 4,812.8 MB, or about 5.05 billion bytes. A 500 MB monthly data allowance is 500 ÷ 1,024 ≈ 0.49 GB. And a 25 megabit-per-second connection transfers 25 ÷ 8 = 3.125 megabytes per second — note the lower-case b for bits versus upper-case B for bytes, the single most common source of confusion here.
Where it's used. Storage conversion comes up when budgeting cloud storage or backups, checking whether a video fits on a drive, reading mobile data caps, and sizing databases and container images. Strictly speaking the binary units have their own names — kibibyte (KiB), mebibyte (MiB), gibibyte (GiB) — but in everyday use KB, MB and GB almost always mean the 1024-based values shown here.