To convert bytes per second to kibibytes per second, multiply by 0.0009765625. That factor is the whole relationship: both units measure how much data moves per second, so the conversion is a proportion with no offset and no substance-specific constant.
One byte per second is eight bits per second. File transfer tools report bytes, which is the single most common source of confusion about whether a connection is running at its rated speed. A kibibyte is exactly 1,024 bytes. Linux tools and torrent clients often report KiB/s while marketing uses kB/s, a 2.4% difference.
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 kibibytes per second, which is usually more useful than the bare number.
The formula
bytes per second- The amount you are converting, in bytes per second
0.0009765625- The exact number of kibibytes per second in one byte per second
kibibytes per second- The converted result
How it works, step by step
- Enter the value in bytes per second.
- It is multiplied by 0.0009765625, the exact factor between the two units.
- The answer is shown in kibibytes per second, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
SD video stream: 3.75e+05 B/s in kibibytes per second
SD video stream comes to about 3.75e+05 B/s. Multiplying by the factor: 3.75e+05 × 0.000976562 = 366.211 KiB/s. Dividing the answer back by 0.000976562 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
4K video stream: 3.12e+06 B/s in kibibytes per second
At 3.12e+06 B/s (4k video stream), the same quantity in kibibytes per second is 3.12e+06 × 0.000976562 = 3046.88 KiB/s. One byte per second is 0.000976562 kibibytes per second, so the numbers shrink as expected.
How to read your score
Frequently asked questions
How many kibibytes per second are in one byte per second?
Exactly 0.0009765625. 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 bytes per second to kibibytes per second?
kibibytes per second = bytes per second × 0.0009765625. Reversed, bytes per second = kibibytes per second ÷ 0.0009765625, which is the same as multiplying by 1024.
Which is the bigger unit, the byte per second or the kibibyte per second?
The kibibyte per second. One byte per second is only 0.000976562 of a kibibyte per second, so it takes 1024 bytes per second to make one kibibyte 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 byte per second?
One byte per second is eight bits per second. File transfer tools report bytes, which is the single most common source of confusion about whether a connection is running at its rated speed.
What is a kibibyte per second?
A kibibyte is exactly 1,024 bytes. Linux tools and torrent clients often report KiB/s while marketing uses kB/s, a 2.4% difference.
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.
Is there a quick way to do B/s to KiB/s in my head?
Plenty of people do this in their head: divide by 1000 instead of using the exact factor 0.0009765625. At 100 that shortcut gives 0.1 kibibytes per second, off by 0.002344 kibibytes per second or about 2.40%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Bytes Per Second to kibibytes per second reference tables
| Bytes Per Second | Kibibytes Per Second |
|---|---|
| 0.5 B/s | 0.000488281 KiB/s |
| 1 B/s | 0.000976562 KiB/s |
| 2 B/s | 0.00195312 KiB/s |
| 3 B/s | 0.00292969 KiB/s |
| 5 B/s | 0.00488281 KiB/s |
| 10 B/s | 0.00976562 KiB/s |
| 20 B/s | 0.0195312 KiB/s |
| 25 B/s | 0.0244141 KiB/s |
| 50 B/s | 0.0488281 KiB/s |
| 75 B/s | 0.0732422 KiB/s |
| 100 B/s | 0.0976562 KiB/s |
| 250 B/s | 0.244141 KiB/s |
| 500 B/s | 0.488281 KiB/s |
| 1000 B/s | 0.976562 KiB/s |
| 5000 B/s | 4.88281 KiB/s |
Exact factor: 1 byte per second = 0.0009765625 kibibytes per second.
| Quantity | B/s | KiB/s |
|---|---|---|
| MP3 audio, 320 kbps | 4e+04 B/s | 39.06 KiB/s |
| SD video stream | 3.75e+05 B/s | 366.2 KiB/s |
| HD video stream | 1e+06 B/s | 976.6 KiB/s |
| 4K video stream | 3.125e+06 B/s | 3052 KiB/s |
| Wired gigabit Ethernet | 1.25e+08 B/s | 1.221e+05 KiB/s |
| Wi-Fi 6 link rate | 1.5e+08 B/s | 1.465e+05 KiB/s |
Published reference values, converted with the same factor this page uses.