Gigabit digital storage unit.
Gigabits to Terabits Converter — Gb to Tb
Convert Gigabit (Gb) to Terabit (Tb) using the exact conversion factor (1 gigabit = 0.001 terabit). See the formula, worked examples, conversion table, history, and common uses.
Gigabits to Terabits 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.
Terabit digital storage unit.
Result = input x 1e+9 / 1e+12.
Digital storage uses bits as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Gigabits to Terabits
Gigabit and Terabit are everyday digital-storage units, used for everything from file sizes and app downloads to storage device capacity and mobile data allowances. Gigabit is most often used for gigabit fiber internet service advertising.
Formula
terabits = gigabits × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 gigabit equals 1000000000 base units, and 1 terabit equals 1e+12 base units, so dividing one by the other gives the direct gigabit-to-terabit factor of 0.001.
Simple example
1 Gb × 0.001 = 0.001 Tb
1 gigabit = 0.001 terabits.
Real-world example
500 Gb × 0.001 = 0.5 Tb
500 gigabits = 0.5 terabits.
Conversion table
| Gigabit (Gb) | Terabit (Tb) |
|---|---|
| 1 Gb | 0.001 Tb |
| 8 Gb | 0.008 Tb |
| 16 Gb | 0.016 Tb |
| 64 Gb | 0.064 Tb |
| 256 Gb | 0.256 Tb |
| 1,000 Gb | 1 Tb |
Reverse conversion: Terabit to Gigabit
0.001 Tb × 1000 = 1 Gb
0.001 terabits = 1 gigabit.
gigabits = terabits × 1000
For a page dedicated to this direction, see Terabit to Gigabit.
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.
Understanding the Terabit (Tb)
Terabit digital storage unit.
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 terabits are in 1 gigabit?
1 gigabit equals 0.001 terabits, using the exact defined conversion factor rather than an estimate.
How do I convert gigabit to terabit?
Multiply the gigabit value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert terabit back to gigabit?
Use the reverse factor: 1 terabit equals 1,000 gigabits. You can also use the swap control in the converter above to flip the direction instantly.
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.
What is a terabit?
Terabit (Tb) is a unit of digital storage.
Is the gigabit to terabit conversion exact?
Yes. Both gigabit and terabit are defined by fixed standards rather than physical artifacts, so the factor of 0.001 used above is exact to as many digits as you choose to display.
Where is the gigabit still used today?
Used worldwide for high-speed network ratings (fiber internet, data centers)