Terabits to Gigabytes Converter
Enter the data size in terabits below to convert it to gigabytes.
Convert Terabits to Gigabytes
Enter a value in terabits (Tb) to convert to gigabytes (GB).
Terabit to Gigabyte Conversion Table
Table showing various terabit measurements converted to gigabytes. Click any preset value or arrow to load it into the converter.
How to Convert Terabits to Gigabytes
To convert terabits to gigabytes, multiply the data size by the following conversion ratio: 125 gigabytes/terabit.
Since one terabit is equal to 125 gigabytes, you can use this simple formula to convert:
The data size in gigabytes is equal to the data size in terabits multiplied by 125.
For example, here's how to convert 5 terabits to gigabytes using the formula above.
How Many Gigabytes Are in a Terabit?
There are 125 gigabytes in a terabit, which is why we use this value in the formula above.
Our terabit to gigabyte calculator automatically converts your data size measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Terabits and gigabytes are both units used to measure data size. Keep reading to learn more about each unit.
What Is a Terabit?
A terabit is a unit of data size equal to 125,000,000,000 bytes (B), the base unit for data size. Equal to 10¹² bits (125 GB). [1]
The terabit is classified as a metric and SI-compatible unit of data size. Terabits can be abbreviated as Tb; for example, 1 terabit can be written as 1 Tb.
In the metric system, "tera" is the standard SI prefix for trillions, or 10¹². This makes the terabit (Tb) a convenient decimal multiple of the byte (B).
In practice, terabits (Tb) are widely used across large-scale industrial, bulk, and macro-level data size specifications within SI metric workflows, engineering documentation, and technical data sheets.
What Is a Gigabyte?
A gigabyte is a unit of data size equal to 1,000,000,000 bytes (B), the base unit for data size. SI decimal standard: 1,000,000,000 bytes. [2]
The gigabyte is classified as a metric and SI-compatible unit of data size. Gigabytes can be abbreviated as GB; for example, 1 gigabyte can be written as 1 GB.
In the metric system, "giga" is the standard SI prefix for billions, or 10⁹. This makes the gigabyte (GB) a convenient decimal multiple of the byte (B).
In practice, gigabytes (GB) are widely used across large-scale industrial, bulk, and macro-level data size specifications within SI metric workflows, engineering documentation, and technical data sheets.
When converting data size between terabits (Tb) and gigabytes (GB), keep full floating-point precision (1 Tb = 125 GB; 1 GB = 0.008 Tb) during intermediate calculations and round only the final gigabyte figure to match your instrument tolerance.
More Terabit & Gigabyte Conversions
Need to calculate in the opposite direction? Use our gigabytes to terabits calculator to switch your starting unit immediately. You can also explore related tools such as converting gigabytes to terabits, converting megabytes to gigabytes, or converting terabytes to gigabytes.
Frequently Asked Questions
References
- [1]NIST / IEC StandardNIST / IEC (IEC 80000-13 Binary Prefixes)·Digital Storage Metrology Standard — Terabits (Tb) to Gigabytes (GB)
- [2]BIPM SpecificationBIPM (SI Decimal Prefixes (k, M, G, T, P))·Unit Specifications: Terabit (Tb) & Gigabyte (Decimal) (GB)
- [3]NIST CUU ReferenceNIST CUU (SI Prefixes & Decimal Multiples)·Conversion Factors & Mathematical Basis (Tb to GB)