One byte per second is exactly 8e-09 gigabits per second, so converting bytes per second to gigabits per second is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
Gigabit per second is the rate of standard wired Ethernet and the faster fibre tiers. 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.
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 gigabits 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
8e-09- The exact number of gigabits per second in one byte per second
gigabits per second- The converted result
How it works, step by step
- Enter the value in bytes per second.
- It is multiplied by 8e-09, the exact factor between the two units.
- The answer is shown in gigabits 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: 1e+06 B/s in gigabits per second
At 1e+06 B/s (hd video stream), the same quantity in gigabits per second is 1e+06 × 8e-09 = 0.008 Gbit/s. One byte per second is 8e-09 gigabits per second, so the numbers shrink as expected.
SD video stream: 3.75e+05 B/s in gigabits per second
Take sd video stream, roughly 3.75e+05 B/s. The conversion is a single multiplication — 3.75e+05 × 8e-09 — giving 0.003 Gbit/s. Because the relationship is proportional, doubling the input doubles the answer to 0.006 Gbit/s.
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Frequently asked questions
How many gigabits per second are in one byte per second?
Exactly 8e-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 gigabits per second?
gigabits per second = bytes per second × 8e-09. Reversed, bytes per second = gigabits per second ÷ 8e-09, which is the same as multiplying by 125,000,000.
Which is the bigger unit, the byte per second or the gigabit per second?
The gigabit per second. One byte per second is only 8e-09 of a gigabit per second, so it takes 1.25e+08 bytes per second to make one gigabit 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 gigabit per second?
Gigabit per second is the rate of standard wired Ethernet and the faster fibre tiers.
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 Gbit/s in my head?
Plenty of people do this in their head: divide by 120000000.000000 instead of using the exact factor 8.0000e-09. At 100 that shortcut gives 0.000001 gigabits per second, off by 3.3333e-08 gigabits per second or about 4.17%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Bytes Per Second to gigabits per second reference tables
| Bytes Per Second | Gigabits Per Second |
|---|---|
| 0.5 B/s | 4e-09 Gbit/s |
| 1 B/s | 8e-09 Gbit/s |
| 2 B/s | 1.6e-08 Gbit/s |
| 3 B/s | 2.4e-08 Gbit/s |
| 5 B/s | 4e-08 Gbit/s |
| 10 B/s | 8e-08 Gbit/s |
| 20 B/s | 1.6e-07 Gbit/s |
| 25 B/s | 2e-07 Gbit/s |
| 50 B/s | 4e-07 Gbit/s |
| 75 B/s | 6e-07 Gbit/s |
| 100 B/s | 8e-07 Gbit/s |
| 250 B/s | 2e-06 Gbit/s |
| 500 B/s | 4e-06 Gbit/s |
| 1000 B/s | 8e-06 Gbit/s |
| 5000 B/s | 4e-05 Gbit/s |
Exact factor: 1 byte per second = 8e-09 gigabits per second.
| Quantity | B/s | Gbit/s |
|---|---|---|
| MP3 audio, 320 kbps | 4e+04 B/s | 0.00032 Gbit/s |
| SD video stream | 3.75e+05 B/s | 0.003 Gbit/s |
| HD video stream | 1e+06 B/s | 0.008 Gbit/s |
| 4K video stream | 3.125e+06 B/s | 0.025 Gbit/s |
| Wired gigabit Ethernet | 1.25e+08 B/s | 1 Gbit/s |
| Wi-Fi 6 link rate | 1.5e+08 B/s | 1.2 Gbit/s |
Published reference values, converted with the same factor this page uses.