How to convert bytes to kilobytes
Divide by 1,000 or 1,024 depending on the standard.
1
Enter bytes
Use the raw byte count from a file size or storage report.
2
Choose the standard
Decimal for networking and storage specs, binary for operating-system reports.
3
Read the units
The calculator also shows megabytes, gigabytes and bits.
What does this tool do?
Storage is sold in decimal units (1 KB = 1,000 bytes), while many operating systems report binary units (1 KiB = 1,024 bytes). Choose the convention you need.
The Formula
KB = bytes ÷ 1,000 (decimal) or ÷ 1,024 (binary)Frequently Asked Questions
Is 1 KB 1,000 or 1,024 bytes?
Both conventions exist. Decimal defines 1 KB as 1,000 bytes; binary defines 1 KiB as 1,024 bytes, though many systems still label it KB.
Why does my 1 TB drive show less space?
Drives are sold in decimal terabytes, while the operating system may report binary units. Formatting overhead accounts for a further small difference.