Terabytes (TB) to Kilobytes (KB) Converter

File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Terabyte is 10¹² bytes and 1 Kilobyte is 10³ bytes. Divide one by the other and you get the ratio between the two units: 10¹² ÷ 10³ = 10⁹.

Terabyte is the bigger unit, so you multiply. Every TB holds 1,000,000,000 KB, which means the decimal point moves 9 places to the right.

On the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB) these two are 3 steps apart. Every step is a factor of 1,000, so 3 steps means 1,000 multiplied by itself 3 times, which is 10⁹.

Need the other direction? Open the KB to TB converter.

A terabyte is 1,000 gigabytes, about 250,000 photos at 4 MB each. Terabytes are how consumer SSDs, external drives, home NAS boxes and cloud storage plans are sold.

A kilobyte is 1,000 bytes, roughly a short paragraph of text. Kilobytes are the everyday unit for small files such as text documents, icons, config files and scripts, and for tight limits like form uploads or email signatures.

Going from terabytes down to kilobytes always gives a bigger number, because the unit you land on is smaller. It is the usual direction when a limit or a form asks for a smaller unit than the one you have in mind.