Convert between KB, MB, GB and TB.
Computing has historically used 1024 (2¹⁰) as the base for storage units, since binary systems work naturally in powers of two — this calculator follows that convention. Some manufacturers instead market storage using decimal (1000-based) units, which is part of why a drive's advertised capacity and your operating system's reported capacity can differ slightly, even though no storage space is actually missing.
Storage manufacturers typically advertise capacity using decimal (1000-based) units, while operating systems display it using binary (1024-based) units, like this converter does. A drive advertised as 1TB shows as roughly 931 GiB in binary units — the drive isn't missing space, the units just measure differently.
Computers operate in binary, where 2¹⁰ (1024) is a more natural round number than 1000. This convention (KB = 1024 bytes) has been the traditional standard in computing, even though it technically conflicts with the metric prefix system.