Tbps to GB/s
1 terabit per second equals 125 gigabytes per second exactly.
How to convert terabits per second to gigabytes per second
To convert terabits per second to gigabytes per second, multiply the number of terabits per second by 125. This factor is exact. To go the other way, multiply gigabytes per second by 0.008.
gigabytes per second = terabits per second × 125
Example: 10 terabits per second = 1,250 gigabytes per second.
Network speeds are quoted in bits per second (lowercase b), while file sizes use bytes (uppercase B). Divide Mbps by 8 for MB/s.
About these units
Terabit Per Second (Tbps)
10¹² bits per second. The scale of backbone and undersea cables.
Terabit speeds appear where many signals are combined. A single optical fiber can carry dozens of wavelengths at once through dense wavelength-division multiplexing, and modern undersea cables bundle many fiber pairs, so a typical cable can carry tens of terabits per second overseas. A satellite, by comparison, typically offers about 1 Gbit/s, a ratio of more than 1,000 to 1.
One terabit per second is 10¹² bit/s, or 125 GB/s. At that rate a 25 GB Blu-ray disc worth of data would cross the link in a fifth of a second. Ethernet is moving into this range as well. IEEE approved 800 Gigabit Ethernet in February 2024 under 802.3df, and a separate project, 802.3dj, was started in November 2022 to cover 1.6 Tbit/s. Ordinary users rarely meet the unit directly, since it describes capacity shared among many people.
1 terabit per second = 1,000,000,000,000 bits per second (exactly).
Sources: Wikipedia: Submarine communications cable; Wikipedia: Terabit Ethernet; NIST: Metric (SI) prefixes
Gigabyte Per Second (GB/s)
1,000,000,000 bytes per second (8 Gbps). Memory and fast SSD bandwidth.
The gigabyte grew out of the same habit of rounding 1,024 to 1,000. In 1998 the IEC published binary prefixes, reserving gigabyte for the decimal value of 1,000,000,000 bytes and naming 1,073,741,824 bytes a gibibyte. Disk makers have used decimal capacities since the first disk drive, which is why a drive sold as 400 GB can appear as about 372 GB in Windows, while macOS, iOS and Android report decimal sizes.
A gigabyte per second is 1,000,000,000 bytes per second, equal to 8 Gbit/s. At that rate a 25 GB single-layer Blu-ray worth of data transfers in 25 seconds, and one hour of standard-definition video at 2.2 Mbit/s, about 1 GB, would pass in a single second. A 10 Gigabit Ethernet link, by comparison, tops out near 1.25 GB/s. Memory and storage interfaces tend to be described in this unit because their bandwidth is far beyond what ordinary networks offer.
1 gigabyte per second = 8,000,000,000 bits per second (exactly).
Sources: Wikipedia: Gigabyte; Wikipedia: 10 Gigabit Ethernet; NIST: Prefixes for binary multiples
Related conversions
- GB/s to Tbps (reverse)
- Tbps to bps
- Tbps to Kbps
- Tbps to Mbps
- Tbps to Gbps
- Tbps to MB/s
- Tbps to B/s
- Tbps to KB/s
- Tbps to MiB/s
- Bps to GB/s
- Kbps to GB/s
- Mbps to GB/s
- Gbps to GB/s
- MB/s to GB/s
- B/s to GB/s
- KB/s to GB/s
- MiB/s to GB/s
See all data transfer rate units.