One gigabit per second is exactly 0.001 terabits per second, so converting gigabits per second to terabits 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. 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. Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into terabits per second, which is usually more useful than the bare number.
The formula
gigabits per second- The amount you are converting, in gigabits per second
0.001- The exact number of terabits per second in one gigabit per second
terabits per second- The converted result
How it works, step by step
- Enter the value in gigabits per second.
- It is multiplied by 0.001, the exact factor between the two units.
- The answer is shown in terabits per second, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
Wired gigabit Ethernet: 1 Gbit/s in terabits per second
At 1 Gbit/s (wired gigabit ethernet), the same quantity in terabits per second is 1 × 0.001 = 0.001 Tbit/s. One gigabit per second is 0.001 terabits per second, so the numbers shrink as expected.
HD video stream: 0.008 Gbit/s in terabits per second
At 0.008 Gbit/s (hd video stream), the same quantity in terabits per second is 0.008 × 0.001 = 8e-06 Tbit/s. One gigabit per second is 0.001 terabits per second, so the numbers shrink as expected.
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Frequently asked questions
How many terabits per second are in one gigabit per second?
Exactly 0.001. 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 gigabits per second to terabits per second?
terabits per second = gigabits per second × 0.001. Reversed, gigabits per second = terabits per second ÷ 0.001, which is the same as multiplying by 1000.
Which is the bigger unit, the gigabit per second or the terabit per second?
The terabit per second. One gigabit per second is only 0.001 of a terabit per second, so it takes 1000 gigabits per second to make one terabit 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 gigabit per second?
Gigabit per second is the rate of standard wired Ethernet and the faster fibre tiers.
What is a terabit per second?
Terabits per second describes backbone and submarine cable capacity rather than anything you can buy for a house.
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.
Gigabits Per Second to terabits per second reference tables
| Gigabits Per Second | Terabits Per Second |
|---|---|
| 0.5 Gbit/s | 0.0005 Tbit/s |
| 1 Gbit/s | 0.001 Tbit/s |
| 2 Gbit/s | 0.002 Tbit/s |
| 3 Gbit/s | 0.003 Tbit/s |
| 5 Gbit/s | 0.005 Tbit/s |
| 10 Gbit/s | 0.01 Tbit/s |
| 20 Gbit/s | 0.02 Tbit/s |
| 25 Gbit/s | 0.025 Tbit/s |
| 50 Gbit/s | 0.05 Tbit/s |
| 75 Gbit/s | 0.075 Tbit/s |
| 100 Gbit/s | 0.1 Tbit/s |
| 250 Gbit/s | 0.25 Tbit/s |
| 500 Gbit/s | 0.5 Tbit/s |
| 1000 Gbit/s | 1 Tbit/s |
| 5000 Gbit/s | 5 Tbit/s |
Exact factor: 1 gigabit per second = 0.001 terabits per second.
| Quantity | Gbit/s | Tbit/s |
|---|---|---|
| MP3 audio, 320 kbps | 0.00032 Gbit/s | 3.2e-07 Tbit/s |
| SD video stream | 0.003 Gbit/s | 3e-06 Tbit/s |
| HD video stream | 0.008 Gbit/s | 8e-06 Tbit/s |
| 4K video stream | 0.025 Gbit/s | 2.5e-05 Tbit/s |
| Wired gigabit Ethernet | 1 Gbit/s | 0.001 Tbit/s |
| Wi-Fi 6 link rate | 1.2 Gbit/s | 0.0012 Tbit/s |
Published reference values, converted with the same factor this page uses.