Terabit digital storage unit.
Terabits to Gigabits Converter — Tb to Gb
Convert Terabit (Tb) to Gigabit (Gb) using the exact conversion factor (1 terabit = 1,000 gigabit). See the formula, worked examples, conversion table, history, and common uses.
Terabits to Gigabits converter
Converter
Digital Storage Converter
Convert bits, bytes, decimal storage, binary storage, nibbles, and word sizes.
Context values
Some unit families need one extra value for a physically accurate result.
Gigabit digital storage unit.
Result = input x 1e+12 / 1e+9.
Digital storage uses bits as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Terabits to Gigabits
Terabit and Gigabit are everyday digital-storage units, used for everything from file sizes and app downloads to storage device capacity and mobile data allowances. Specifically: Terabit digital storage unit, and gigabit digital storage unit.
Formula
gigabits = terabits × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 terabit equals 1e+12 base units, and 1 gigabit equals 1000000000 base units, so dividing one by the other gives the direct terabit-to-gigabit factor of 1000.
Simple example
1 Tb × 1000 = 1,000 Gb
1 terabit = 1,000 gigabits.
Real-world example
500 Tb × 1000 = 500,000 Gb
500 terabits = 500,000 gigabits.
Conversion table
| Terabit (Tb) | Gigabit (Gb) |
|---|---|
| 1 Tb | 1,000 Gb |
| 8 Tb | 8,000 Gb |
| 16 Tb | 16,000 Gb |
| 64 Tb | 64,000 Gb |
| 256 Tb | 256,000 Gb |
| 1,000 Tb | 1,000,000 Gb |
Reverse conversion: Gigabit to Terabit
1 Gb × 0.001 = 0.001 Tb
1 gigabit = 0.001 terabits.
terabits = gigabits × 0.001
For a page dedicated to this direction, see Gigabit to Terabit.
Understanding the Terabit (Tb)
Terabit digital storage unit.
Understanding the Gigabit
Gigabit (Gb) measures digital storage/transfer. A gigabit is 1,000 megabits (125 megabytes) under the decimal convention used for network speeds. It is classified as a Decimal (SI-prefixed) digital unit.
Where it's used: Used worldwide for high-speed network ratings (fiber internet, data centers)
Uses of the Gigabit today
- Gigabit fiber internet service advertising
- Data center and enterprise network bandwidth
History of the Gigabit
As internet speeds crossed the 1,000 Mbps threshold with fiber-optic and enterprise networking, 'gigabit' became the standard marketing term for these connections, following the same bits-per-second convention established for slower network speeds.
Historical origin. Gigabit was not the invention of a single named person; it developed through the process described above.
Gigabit — sources
- IEC 80000-13 — Defines bit-based units distinct from byte-based units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many gigabits are in 1 terabit?
1 terabit equals 1,000 gigabits, using the exact defined conversion factor rather than an estimate.
How do I convert terabit to gigabit?
Multiply the terabit value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert gigabit back to terabit?
Use the reverse factor: 1 gigabit equals 0.001 terabits. You can also use the swap control in the converter above to flip the direction instantly.
What is a terabit?
Terabit (Tb) is a unit of digital storage.
What is a gigabit?
Gigabit (Gb) measures digital storage/transfer. A gigabit is 1,000 megabits (125 megabytes) under the decimal convention used for network speeds. It is classified as a Decimal (SI-prefixed) digital unit.
Is the terabit to gigabit conversion exact?
Yes. Both terabit and gigabit are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.