Kilobytes to Kilobits Converter

Kilobytes to Kilobits

Convert kilobytes (KB) to kilobits (Kb). Both measure digital storage, and the conversion comes up in computing, storage, internet work.

The Formula

`` kilobits = kilobytes × 8 kilobytes = kilobits × 0.125 `

One kilobyte is 8 kilobits, and one kilobit is 0.125 kilobytes.

Conversion Table

Kilobytes	Kilobits
1 KB	8 Kb
2 KB	16 Kb
5 KB	40 Kb
10 KB	80 Kb
25 KB	200 Kb
50 KB	400 Kb
100 KB	800 Kb
500 KB	4,000 Kb
1,000 KB	8,000 Kb

The Other Direction

Kilobits	Kilobytes
1 Kb	0.125 KB
2 Kb	0.25 KB
5 Kb	0.625 KB
10 Kb	1.25 KB
25 Kb	3.125 KB
50 Kb	6.25 KB
100 Kb	12.5 KB
500 Kb	62.5 KB
1,000 Kb	125 KB

What Each Unit Is

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.

Kilobits (Kb) — 1,000 bits in decimal (SI) usage. The telecoms convention, where powers of ten have always been used.

A Sense of Scale

• A page of plain text is about 2 KB
• A small icon is 5–20 KB
• Dial-up peaked at 56 kbit/s
• Audio bitrates are in kbit/s

Precision

The factor 8 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 kilobyteToKilobit = (value) => value * 8; ``

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 KB with the factor truncated at each decimal place:

Decimals kept	Factor	137 KB becomes	Error
0	8	1,096	—
1	8	1,096	—
2	8	1,096	—
3	8	1,096	—
4	8	1,096	—

A rule that holds for any conversion: round once, at the end. Rounding the factor and then multiplying compounds the error through every subsequent calculation, while carrying full precision and rounding the final answer does not.

The right number of significant figures is set by your input, not by the converter. If you measured kilobytes to three significant figures, the answer in kilobits is only good to three — writing more digits claims precision the measurement never had.