To convert bytes per second to gigabytes per second, multiply by 1e-09. 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. Gigabytes per second is the scale of NVMe storage and memory buses rather than networks.
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 gigabytes 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
1e-09- The exact number of gigabytes per second in one byte per second
gigabytes per second- The converted result
How it works, step by step
- Enter the value in bytes per second.
- It is multiplied by 1e-09, the exact factor between the two units.
- The answer is shown in gigabytes per second, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
4K video stream: 3.12e+06 B/s in gigabytes per second
4K video stream comes to about 3.12e+06 B/s. Multiplying by the factor: 3.12e+06 × 1e-09 = 0.00312 GB/s. Dividing the answer back by 1e-09 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
SD video stream: 3.75e+05 B/s in gigabytes per second
Take sd video stream, roughly 3.75e+05 B/s. The conversion is a single multiplication — 3.75e+05 × 1e-09 — giving 0.000375 GB/s. Because the relationship is proportional, doubling the input doubles the answer to 0.00075 GB/s.
How to read your score
Frequently asked questions
How many gigabytes per second are in one byte per second?
Exactly 1e-09. 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 gigabytes per second?
gigabytes per second = bytes per second × 1e-09. Reversed, bytes per second = gigabytes per second ÷ 1e-09, which is the same as multiplying by 1,000,000,000.
Which is the bigger unit, the byte per second or the gigabyte per second?
The gigabyte per second. One byte per second is only 1e-09 of a gigabyte per second, so it takes 1e+09 bytes per second to make one gigabyte 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 gigabyte per second?
Gigabytes per second is the scale of NVMe storage and memory buses rather than networks.
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.
Bytes Per Second to gigabytes per second reference tables
| Bytes Per Second | Gigabytes Per Second |
|---|---|
| 0.5 B/s | 5.00000e-10 GB/s |
| 1 B/s | 1e-09 GB/s |
| 2 B/s | 2e-09 GB/s |
| 3 B/s | 3e-09 GB/s |
| 5 B/s | 5e-09 GB/s |
| 10 B/s | 1e-08 GB/s |
| 20 B/s | 2e-08 GB/s |
| 25 B/s | 2.5e-08 GB/s |
| 50 B/s | 5e-08 GB/s |
| 75 B/s | 7.5e-08 GB/s |
| 100 B/s | 1e-07 GB/s |
| 250 B/s | 2.5e-07 GB/s |
| 500 B/s | 5e-07 GB/s |
| 1000 B/s | 1e-06 GB/s |
| 5000 B/s | 5e-06 GB/s |
Exact factor: 1 byte per second = 1e-09 gigabytes per second.
| Quantity | B/s | GB/s |
|---|---|---|
| MP3 audio, 320 kbps | 4e+04 B/s | 4e-05 GB/s |
| SD video stream | 3.75e+05 B/s | 0.000375 GB/s |
| HD video stream | 1e+06 B/s | 0.001 GB/s |
| 4K video stream | 3.125e+06 B/s | 0.003125 GB/s |
| Wired gigabit Ethernet | 1.25e+08 B/s | 0.125 GB/s |
| Wi-Fi 6 link rate | 1.5e+08 B/s | 0.15 GB/s |
Published reference values, converted with the same factor this page uses.