Bits to Kilobytes
Convert bits (b) to kilobytes (KB). Both measure digital storage, and the conversion comes up in computing, storage, internet work.
The Formula
``
kilobytes = bits × 0.000125
bits = kilobytes × 8000
`
One bit is 1.2500e-4 kilobytes, and one kilobyte is 8,000 bits.
Conversion Table
| Bits | Kilobytes |
|---|---|
| 1 b | 1.2500e-4 KB |
| 2 b | 2.5000e-4 KB |
| 5 b | 6.2500e-4 KB |
| 10 b | 0.00125 KB |
| 25 b | 0.003125 KB |
| 50 b | 0.00625 KB |
| 100 b | 0.0125 KB |
| 500 b | 0.0625 KB |
| 1,000 b | 0.125 KB |
The Other Direction
| Kilobytes | Bits |
|---|---|
| 1 KB | 8,000 b |
| 2 KB | 16,000 b |
| 5 KB | 40,000 b |
| 10 KB | 80,000 b |
| 25 KB | 200,000 b |
| 50 KB | 400,000 b |
| 100 KB | 800,000 b |
| 500 KB | 4,000,000 b |
| 1,000 KB | 8,000,000 b |
What Each Unit Is
Bits (b) — a single binary digit — the smallest unit of information. Named by John Tukey in 1946, from "binary digit".
Kilobytes (KB) — 1,000 bytes in decimal usage; 1,024 bytes in the binary convention (properly a kibibyte). The ambiguity dates to early computing, where 1,024 was close enough to "kilo" to reuse the prefix.
A Sense of Scale
Network speeds are quoted in bits per second- A byte is 8 bits
- A page of plain text is about 2 KB
- A small icon is 5–20 KB
Precision
The factor 0.000125 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.
Watch Out For
- This converter uses decimal (1 KB = 1,000 bytes), which is what drive manufacturers and networks use. Windows reports binary, which is why a "1 TB" drive shows as 931 GB.
In Code
`javascript
const bitToKilobyte = (value) => value * 0.000125;
``
Where This Conversion Comes Up
- Computing
- Storage
- Internet
- Media
- Backups
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 b with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 b becomes | Error |
|---|---|---|---|
| 0 | 0 | 0 | 100.0000% |
| 1 | 0 | 0 | 100.0000% |
| 2 | 0 | 0 | 100.0000% |
| 3 | 0 | 0 | 100.0000% |
| 4 | 0.0001 | 0.0137 | 20.0000% |
The right number of significant figures is set by your input, not by the converter. If you measured bits to three significant figures, the answer in kilobytes is only good to three — writing more digits claims precision the measurement never had.