How to convert bytes to kilobytes
To convert bytes (B) to kilobytes (KB), multiply the value in bytes by 0.001.
KB = B × 0.001 (decimal)
KB = B × 0.0009765625 (binary)
Example: 10 B = 0.01 KB, or 0.009765625 KB in binary.
Decimal (SI) counting steps by 1,000 and is what drive makers, macOS and phones use. Binary counting steps by 1,024 and is what Windows and RAM use; its unambiguous IEC names are KiB, MiB and GiB. Bits are decimal either way.
You can also type 10 B to KB into the smart calculator, or mix units: 1 B + 1 KB.
Bytes to Kilobytes conversion table
| Bytes | Kilobytes (decimal) | Kilobytes (binary) |
|---|---|---|
| 0.01 B | 0.00001 KB | 0.000009765625 KB |
| 0.1 B | 0.0001 KB | 0.00009765625 KB |
| 0.25 B | 0.00025 KB | 0.00024414063 KB |
| 0.5 B | 0.0005 KB | 0.00048828125 KB |
| 1 B | 0.001 KB | 0.0009765625 KB |
| 2 B | 0.002 KB | 0.001953125 KB |
| 3 B | 0.003 KB | 0.0029296875 KB |
| 4 B | 0.004 KB | 0.00390625 KB |
| 5 B | 0.005 KB | 0.0048828125 KB |
| 6 B | 0.006 KB | 0.005859375 KB |
| 7 B | 0.007 KB | 0.0068359375 KB |
| 8 B | 0.008 KB | 0.0078125 KB |
| 9 B | 0.009 KB | 0.0087890625 KB |
| 10 B | 0.01 KB | 0.009765625 KB |
| 12 B | 0.012 KB | 0.01171875 KB |
| 15 B | 0.015 KB | 0.014648438 KB |
| 20 B | 0.02 KB | 0.01953125 KB |
| 25 B | 0.025 KB | 0.024414063 KB |
| 30 B | 0.03 KB | 0.029296875 KB |
| 40 B | 0.04 KB | 0.0390625 KB |
| 50 B | 0.05 KB | 0.048828125 KB |
| 60 B | 0.06 KB | 0.05859375 KB |
| 75 B | 0.075 KB | 0.073242188 KB |
| 100 B | 0.1 KB | 0.09765625 KB |
| 250 B | 0.25 KB | 0.24414063 KB |
| 500 B | 0.5 KB | 0.48828125 KB |
| 1,000 B | 1 KB | 0.9765625 KB |
Converting kilobytes back to bytes
1 KB = 1,000 B. See the Kilobytes to Bytes converter, or press the swap button above.
About the units
Byte (B)
Eight bits.
Kilobyte (KB)
In decimal (SI) mode 1,000 bytes; in binary mode 1,024 bytes, as Windows and RAM count. The unambiguous binary name is kibibyte (KiB).
Digital storage is counted in bits and bytes (1 byte = 8 bits). There are two ways to count bytes. Decimal (SI) prefixes step by 1,000: 1 KB = 1,000 B and 1 GB = 1,000 MB, which is how drive makers, macOS, iOS and Android report sizes. Binary prefixes step by 1,024: 1 KB = 1,024 B and 1 GB = 1,024 MB, which is how Windows and RAM count (the IEC names for these are KiB, MiB and GiB). Bits are always decimal: 1 Kb = 1,000 b.
Questions and answers
How many kilobytes are in a byte?
One byte (B) equals 0.001 kilobytes in decimal (SI) counting, or 0.0009765625 kilobytes in binary counting (1 KB = 1,024 B), which Windows uses.
How do I convert bytes to kilobytes?
To convert bytes to kilobytes, multiply the value in bytes by 0.001. The formula is KB = B × 0.001. For example, 10 B = 0.01 KB.
What is 10 B in KB?
10 bytes is 0.01 kilobytes.
Which is bigger, a byte or a kilobyte?
A kilobyte is bigger: 1 KB = 1,000 B.
Is 1 GB equal to 1,000 MB or 1,024 MB?
Both are in use. In decimal (SI) counting, which drive makers, macOS, iOS and Android use, 1 GB = 1,000 MB. In binary counting, which Windows and RAM use, 1 GB = 1,024 MB; the unambiguous IEC name for that size is the gibibyte (GiB). ConvertEasy has a Decimal / Binary switch so KB, MB, GB and TB follow whichever you need, while KiB, MiB and GiB are always binary.
Are kilobits 1,000 or 1,024 bits?
ConvertEasy treats bits as decimal in both modes: 1 Kb = 1,000 b, 1 Mb = 1,000 Kb. A byte is always 8 bits, so only byte units (KB, MB, GB…) change with the switch.
Does this B to KB converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.