Kilobytes (KB) to Bytes (B) Converter

File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Kilobyte is 10³ bytes and 1 Byte is 10⁰ bytes. Divide one by the other and you get the ratio between the two units: 10³ ÷ 10⁰ = 10³.

Kilobyte is the bigger unit, so you multiply. Every KB holds 1,000 B, which means the decimal point moves 3 places to the right.

These two sit side by side on the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB), so there is nothing to work out beyond remembering that every step is a factor of 1,000.

Need the other direction? Open the Bytes (B) to KB converter.

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.

A byte is eight bits, enough to store one character of plain English text. Bytes show up whenever you need the exact number: file properties, HTTP headers, memory buffers, database column limits and the counts programs print in logs.

Bytes are the base unit, so this gives the exact count that programs, APIs and file properties report.

Going from kilobytes down to bytes 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.