This page converts bits per second into kilobytes per second using the factor 0.000125, and shows the reverse figure alongside it. Both units measure how much data moves per second, which is why one number does the whole job.
Kilobytes per second is what a download dialog shows on a slow connection: 1 kB/s is 8 kbit/s. One bit per second is the base unit of data rate. Network speeds are always quoted in bits, which is why a 100 Mbps line downloads at about 12 MB/s.
Bits and bytes. Network speeds are sold in bits per second and file transfers are reported in bytes per second, and there are eight bits to a byte, so a 100 Mbps line downloads at about 12 MB/s. A connection is not underperforming by a factor of eight; it is being measured in different units. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into kilobytes per second, which is usually more useful than the bare number.
The formula
bits per second- The amount you are converting, in bits per second
0.000125- The exact number of kilobytes per second in one bit per second
kilobytes per second- The converted result
How it works, step by step
- Enter the value in bits per second.
- It is multiplied by 0.000125, the exact factor between the two units.
- The answer is shown in kilobytes per second, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
HD video stream: 8e+06 bit/s in kilobytes per second
Take hd video stream, roughly 8e+06 bit/s. The conversion is a single multiplication — 8e+06 × 0.000125 — giving 1000 kB/s. Because the relationship is proportional, doubling the input doubles the answer to 2000 kB/s.
MP3 audio, 320 kbps: 3.2e+05 bit/s in kilobytes per second
Take mp3 audio, 320 kbps, roughly 3.2e+05 bit/s. The conversion is a single multiplication — 3.2e+05 × 0.000125 — giving 40 kB/s. Because the relationship is proportional, doubling the input doubles the answer to 80 kB/s.
How to read your score
Frequently asked questions
How many kilobytes per second are in one bit per second?
Exactly 0.000125. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert bits per second to kilobytes per second?
kilobytes per second = bits per second × 0.000125. Reversed, bits per second = kilobytes per second ÷ 0.000125, which is the same as multiplying by 8000.
Which is the bigger unit, the bit per second or the kilobyte per second?
The kilobyte per second. One bit per second is only 0.000125 of a kilobyte per second, so it takes 8000 bits per second to make one kilobyte per second.
What does this quantity actually measure?
Both units measure how much data moves per second. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a bit per second?
One bit per second is the base unit of data rate. Network speeds are always quoted in bits, which is why a 100 Mbps line downloads at about 12 MB/s.
What is a kilobyte per second?
Kilobytes per second is what a download dialog shows on a slow connection: 1 kB/s is 8 kbit/s.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Bits Per Second to kilobytes per second reference tables
| Bits Per Second | Kilobytes Per Second |
|---|---|
| 0.5 bit/s | 6.25e-05 kB/s |
| 1 bit/s | 0.000125 kB/s |
| 2 bit/s | 0.00025 kB/s |
| 3 bit/s | 0.000375 kB/s |
| 5 bit/s | 0.000625 kB/s |
| 10 bit/s | 0.00125 kB/s |
| 20 bit/s | 0.0025 kB/s |
| 25 bit/s | 0.003125 kB/s |
| 50 bit/s | 0.00625 kB/s |
| 75 bit/s | 0.009375 kB/s |
| 100 bit/s | 0.0125 kB/s |
| 250 bit/s | 0.03125 kB/s |
| 500 bit/s | 0.0625 kB/s |
| 1000 bit/s | 0.125 kB/s |
| 5000 bit/s | 0.625 kB/s |
Exact factor: 1 bit per second = 0.000125 kilobytes per second.
| Quantity | bit/s | kB/s |
|---|---|---|
| MP3 audio, 320 kbps | 3.2e+05 bit/s | 40 kB/s |
| SD video stream | 3e+06 bit/s | 375 kB/s |
| HD video stream | 8e+06 bit/s | 1000 kB/s |
| 4K video stream | 2.5e+07 bit/s | 3125 kB/s |
| Wired gigabit Ethernet | 1e+09 bit/s | 1.25e+05 kB/s |
| Wi-Fi 6 link rate | 1.2e+09 bit/s | 1.5e+05 kB/s |
Published reference values, converted with the same factor this page uses.