Kilobits to Bytes Converter

Kilobits to Bytes

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

The Formula

`` bytes = kilobits × 125 kilobits = bytes × 0.008 `

One kilobit is 125 bytes, and one byte is 0.008 kilobits.

Conversion Table

Kilobits	Bytes
1 Kb	125 B
2 Kb	250 B
5 Kb	625 B
10 Kb	1,250 B
25 Kb	3,125 B
50 Kb	6,250 B
100 Kb	12,500 B
500 Kb	62,500 B
1,000 Kb	125,000 B

The Other Direction

Bytes	Kilobits
1 B	0.008 Kb
2 B	0.016 Kb
5 B	0.04 Kb
10 B	0.08 Kb
25 B	0.2 Kb
50 B	0.4 Kb
100 B	0.8 Kb
500 B	4 Kb
1,000 B	8 Kb

What Each Unit Is

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

Bytes (B) — 8 bits. Coined at IBM in 1956 for the group of bits encoding one character.

A Sense of Scale

• Dial-up peaked at 56 kbit/s
• Audio bitrates are in kbit/s
• One ASCII character is 1 byte
• A UTF-8 emoji is often 4 bytes

Precision

The factor 125 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.

In Code

`javascript const kilobitToByte = (value) => value * 125; ``

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	125	17,125	—
1	125	17,125	—
2	125	17,125	—
3	125	17,125	—
4	125	17,125	—

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 kilobits to three significant figures, the answer in bytes is only good to three — writing more digits claims precision the measurement never had.

Other Conversions From Kilobits

The same value in every other unit this converter supports for data:

From	To	Unit
1 Kb	1,000 b	Bits
1 Kb	0.125 KB	Kilobytes
1 Kb	0.001 Mb	Megabits
1 Kb	1.2500e-4 MB	Megabytes
1 Kb	1.2500e-7 GB	Gigabytes
1 Kb	1.2500e-10 TB	Terabytes

Chaining conversions works — kilobits to metres to feet gives the same answer as kilobits to feet — but each step rounds, so a chain of three conversions carries three roundings. Convert directly where a direct factor exists.