This page converts terabits per second into bytes per second using the factor 1.25e+11, 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.
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. Terabits per second describes backbone and submarine cable capacity rather than anything you can buy for a house.
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. Below the calculator there is a step table for the values people look up most, and a second table putting real how much data moves per second figures into bytes per second so the number you get has something to be compared against.
The formula
terabits per second- The amount you are converting, in terabits per second
125,000,000,000- The exact number of bytes per second in one terabit per second
bytes per second- The converted result
How it works, step by step
- Enter the value in terabits per second.
- It is multiplied by 125,000,000,000, the exact factor between the two units.
- The answer is shown in bytes per second, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Wi-Fi 6 link rate: 0.0012 Tbit/s in bytes per second
Take wi-fi 6 link rate, roughly 0.0012 Tbit/s. The conversion is a single multiplication — 0.0012 × 1.25e+11 — giving 1.5e+08 B/s. Because the relationship is proportional, doubling the input doubles the answer to 3e+08 B/s.
Wired gigabit Ethernet: 0.001 Tbit/s in bytes per second
At 0.001 Tbit/s (wired gigabit ethernet), the same quantity in bytes per second is 0.001 × 1.25e+11 = 1.25e+08 B/s. One terabit per second is 1.25e+11 bytes per second, so the numbers grow as expected.
How to read your score
Frequently asked questions
How many bytes per second are in one terabit per second?
Exactly 125,000,000,000. 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 terabits per second to bytes per second?
bytes per second = terabits per second × 125,000,000,000. Reversed, terabits per second = bytes per second ÷ 125,000,000,000, which is the same as multiplying by 8.00000000000e-12.
Which is the bigger unit, the terabit per second or the byte per second?
The terabit per second. One terabit per second equals 1.25e+11 bytes 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 terabit per second?
Terabits per second describes backbone and submarine cable capacity rather than anything you can buy for a house.
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.
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 Tbit/s to B/s in my head?
Plenty of people do this in their head: multiply by 120000000000.000000 instead of using the exact factor 125000000000.000000. At 100 that shortcut gives 1.2000e+13 bytes per second, off by 500000000000.000000 bytes per second or about 4.00%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Terabits Per Second to bytes per second reference tables
| Terabits Per Second | Bytes Per Second |
|---|---|
| 0.5 Tbit/s | 6.25e+10 B/s |
| 1 Tbit/s | 1.25e+11 B/s |
| 2 Tbit/s | 2.5e+11 B/s |
| 3 Tbit/s | 3.75e+11 B/s |
| 5 Tbit/s | 6.25e+11 B/s |
| 10 Tbit/s | 1.25e+12 B/s |
| 20 Tbit/s | 2.5e+12 B/s |
| 25 Tbit/s | 3.125e+12 B/s |
| 50 Tbit/s | 6.25e+12 B/s |
| 75 Tbit/s | 9.375e+12 B/s |
| 100 Tbit/s | 1.25e+13 B/s |
| 250 Tbit/s | 3.125e+13 B/s |
| 500 Tbit/s | 6.25e+13 B/s |
| 1000 Tbit/s | 1.25e+14 B/s |
| 5000 Tbit/s | 6.25e+14 B/s |
Exact factor: 1 terabit per second = 125,000,000,000 bytes per second.
| Quantity | Tbit/s | B/s |
|---|---|---|
| MP3 audio, 320 kbps | 3.2e-07 Tbit/s | 4e+04 B/s |
| SD video stream | 3e-06 Tbit/s | 3.75e+05 B/s |
| HD video stream | 8e-06 Tbit/s | 1e+06 B/s |
| 4K video stream | 2.5e-05 Tbit/s | 3.125e+06 B/s |
| Wired gigabit Ethernet | 0.001 Tbit/s | 1.25e+08 B/s |
| Wi-Fi 6 link rate | 0.0012 Tbit/s | 1.5e+08 B/s |
Published reference values, converted with the same factor this page uses.