terabyte [TB] Unit Converter

Definition of terabyte [TB] unit

A terabyte (TB) is a unit of digital information equal to 1,000 gigabytes, or 10^12 bytes, in the decimal system. In computing, it may also refer to 1,099,511,627,776 bytes (2^40), technically called a tebibyte.

History of terabyte [TB] unit

The prefix “tera-” comes from the Greek word teras, meaning “monster” or “marvel,” and was adopted into the International System of Units to represent 10^12. The terabyte emerged as storage technology advanced beyond gigabyte-scale capacities during the late twentieth century. Hard-disk manufacturers commonly defined it decimally, while operating systems sometimes used 2^40 bytes and labeled that amount a terabyte. To reduce confusion, the International Electrotechnical Commission introduced “tebibyte” in 1998 for 2^40 bytes, reserving terabyte for the standardized decimal quantity.

Applications of terabyte [TB] unit

Terabytes measure capacity in hard drives, solid-state drives, memory cards, backup systems, and cloud storage. A 1 TB drive can hold approximately 250,000 four-megapixel photos, 200,000 songs, or many hours of high-definition video, though usable space varies with formatting and file sizes. Organizations also use terabytes to describe databases, archives, and daily data-generation volumes.

Complete list of terabyte [TB] unit conversion