Data Storage Converter
Convert file and storage sizes between bytes, kilobytes, megabytes, gigabytes, and terabytes, in both decimal (1000-based) and binary (1024-based) systems.
Storage vendors typically advertise decimal (1000-based) capacity, while operating systems often report binary (1024-based) usage, which is why a "1TB" drive shows less than 1000GB in your OS.
Frequently asked questions
Why does my 1TB drive show less than 1000GB in Windows?+
Drive manufacturers use decimal units (1TB = 1000GB), but operating systems typically report binary units (1TiB = 1024GiB), so the same physical capacity displays a smaller number. Switch modes here to see both.
Which system should I use for RAM?+
RAM is conventionally measured in binary units (1024-based), even though it's often labeled with decimal unit names like GB.
What's the difference between KB and KiB?+
KB (kilobyte) traditionally means 1000 bytes in the decimal system; KiB (kibibyte) unambiguously means 1024 bytes in the binary system.