Bytes to Kilobytes Converter

About the b to kb calculation

One byte is exactly 0.001 kilobytes, so converting between them is a single multiplication. Enter any value above and the result updates as you type. Eight bits, and the base unit every other storage figure is built from. Decimal kilobyte — 1,000 bytes. Windows and macOS often mean 1,024 when they write "KB".

Formula

KB = B × 0.001

1 B = 0.001 KB
1 KB = 1,000 B

Worked example

To convert 1,024 B, multiply by 0.001: 1,024 × 0.001 = 1.024 KB.

Frequently asked questions

How many kilobytes are in a byte?

There are 0.001 kilobytes in one byte. To convert any amount, multiply the number of bytes by 0.001.

How do I convert kilobytes back to bytes?

Divide instead of multiplying, or equivalently multiply by 1,000. One kilobyte is 1,000 bytes.

Is this conversion exact?

Yes, provided both sides use the same convention. Decimal units (KB, MB, GB) are powers of 1,000 and binary units (KiB, MiB, GiB) are powers of 1,024. Both are exact — the confusion comes from software labelling binary values with decimal names.

Where is each of these units used?

Bytes: eight bits, and the base unit every other storage figure is built from. Kilobytes: decimal kilobyte — 1,000 bytes. Windows and macOS often mean 1,024 when they write "KB".

Sources

• IEC 80000-13 — binary and decimal prefixes for information units