Data Storage Converter

About this calculator

This converter moves a data size between bits, bytes, kilobytes, megabytes, gigabytes and terabytes, using the binary convention where 1 KB = 1024 bytes (the same convention operating systems like Windows use when reporting file and disk sizes) rather than the decimal 1000-byte kilobyte used in some marketing contexts. That distinction is exactly why a drive labeled "1 TB" shows up as roughly 931 GB in your file explorer — the manufacturer used decimal units, the OS displays binary ones.

It's used by anyone estimating whether a file, video or backup will fit on a given drive or upload allowance, by developers calculating memory or storage requirements, and by people comparing internet plans or cloud storage tiers quoted in different units. Converting bits to bytes specifically also matters for reading network speeds correctly, since connection speeds are quoted in bits per second while file sizes are quoted in bytes.