How do you convert gigabits to terabits?

To convert gigabits (Gb) to terabits (Tb), multiply the data size in gigabits by 0.001 (terabits = gigabits × 0.001).

What is 5 gigabits in terabits?

5 gigabits (5 Gb) is equal to 0.005 terabits (0.005 Tb).

Which is larger, 1 gigabit (Gb) or 1 terabit (Tb)?

One terabit (Tb) is larger than one gigabit (Gb). Specifically, 1 Tb equals 1,000 Gb, while 1 Gb is 0.001 Tb.

How do I convert back from terabits (Tb) to gigabits (Gb)?

To reverse the calculation from Tb to Gb, multiply your terabit value by the inverse factor 1,000 (or divide by 0.001). You can also click the Swap button in the tool above to flip directions in one click.

Are there regional or standard differences when converting Gb and Tb?

Decimal SI (Base-10) vs. Binary IEC (Base-2) & Bits vs. Bytes: Networking speeds and storage drive manufacturers use SI decimal prefixes (1 kB = 1,000 bytes, 1 MB = 1,000,000 bytes, 1 GB = 10⁹ bytes), whereas operating systems and RAM often report binary IEC prefixes (1 KiB = 1,024 bytes, 1 MiB = 1,048,576 bytes, 1 GiB = 1,073,741,824 bytes). Also note that lowercase 'b' denotes bits while uppercase 'B' denotes Bytes (1 Byte = 8 bits).

Gigabits to Terabits Converter

Enter the data size in gigabits below to convert it to terabits.

Terabits to Gigabits (Tb → Gb)

Convert Gigabits to Terabits

Enter a value in gigabits (Gb) to convert to terabits (Tb).

Value (Gb)

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Result

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0.005terabits

5 Gb = 0.005 Tb

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Suggested Conversions

Reference:NIST / IEC (IEC 80000-13 Binary Prefixes)

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Gigabit to Terabit Conversion Table

Table showing various gigabit measurements converted to terabits. Click any preset value or arrow to load it into the converter.

Gigabits (Gb)	Terabits (Tb)
1 Gb	0.001 Tb
2 Gb	0.002 Tb
2.5 Gb	0.0025 Tb
5 Gb	0.005 Tb
10 Gb	0.01 Tb
15 Gb	0.015 Tb
20 Gb	0.02 Tb
25 Gb	0.025 Tb
30 Gb	0.03 Tb
50 Gb	0.05 Tb

How to Convert Gigabits to Terabits

To convert gigabits to terabits, multiply the data size by the following conversion ratio: 0.001 terabits/gigabit.

Since one gigabit is equal to 0.001 terabits, you can use this simple formula to convert:

terabits = gigabits × 0.001

The data size in terabits is equal to the data size in gigabits multiplied by 0.001.

For example, here's how to convert 5 gigabits to terabits using the formula above.

terabits = (5 Gb × 0.001) = 0.005 Tb

How Many Terabits Are in a Gigabit?

There are 0.001 terabits in a gigabit, which is why we use this value in the formula above.

1 Gb = 0.001 Tb|1 Tb = 1,000 Gb

Our gigabit to terabit calculator automatically converts your data size measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Gigabits and terabits are both units used to measure data size. Keep reading to learn more about each unit.

What Is a Gigabit?

A gigabit is a unit of data size equal to 125,000,000 bytes (B), the base unit for data size. Equal to 1,000,000,000 bits (125 MB). [1]

The gigabit is classified as a metric and SI-compatible unit of data size. Gigabits can be abbreviated as Gb; for example, 1 gigabit can be written as 1 Gb.

In the metric system, "giga" is the standard SI prefix for billions, or 10⁹. This makes the gigabit (Gb) a convenient decimal multiple of the byte (B).

In practice, gigabits (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.

Learn more about gigabits in our Digital Storage Converter.

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). [2]

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.

Learn more about terabits in our Digital Storage Converter.

When converting data size between gigabits (Gb) and terabits (Tb), keep full floating-point precision (1 Gb = 0.001 Tb; 1 Tb = 1,000 Gb) during intermediate calculations and round only the final terabit figure to match your instrument tolerance.

More Gigabit & Terabit Conversions

Need to calculate in the opposite direction? Use our terabits to gigabits calculator to switch your starting unit immediately. You can also explore related tools such as converting terabits to gigabits, converting megabytes to gigabytes, or converting gigabytes to terabytes.

Convert from Gigabits

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Frequently Asked Questions

There are 0.001 terabits (Tb) in 1 gigabit (Gb). Conversely, 1 terabit (Tb) is equal to 1,000 gigabits (Gb).

Digital Storage Converter

Quick Info

Direct Factor: 1 gigabit (Gb) equals 0.001 terabits (Tb).
Inverse Factor: 1 terabit (Tb) equals 1,000 gigabits (Gb).
Formula: terabits = gigabits ÷ 1000.
Standard Note: Decimal SI (Base-10) vs. Binary IEC (Base-2) & Bits vs. Bytes: Networking speeds and storage drive manufacturers use SI decimal prefixes (1 kB = 1,000 bytes, 1 MB = 1,000,000 bytes, 1 GB = 10⁹ bytes), whereas operating systems and RAM often report binary IEC prefixes (1 KiB = 1,024 bytes, 1 MiB = 1,048,576 bytes, 1 GiB = 1,073,741,824 bytes). Also note that lowercase 'b' denotes bits while uppercase 'B' denotes Bytes (1 Byte = 8 bits).

Units Comparison

Gigabit (Gb)

Equal to 1,000,000,000 bits (125 MB).

Terabit (Tb)

Equal to 10¹² bits (125 GB).

Byte (B)

8 binary bits.

References

[1]NIST / IEC · IEC 80000-13 Binary Prefixes
Source
[2]BIPM · SI Decimal Prefixes (k, M, G, T, P)
Source
[3]NIST CUU · SI Prefixes & Decimal Multiples
Source

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References

NIST · BIPM · ISO

[1]
NIST / IEC (IEC 80000-13 Binary Prefixes)·Digital Storage Metrology Standard — Gigabits (Gb) to Terabits (Tb)
NIST / IEC Standard
[2]
BIPM (SI Decimal Prefixes (k, M, G, T, P))·Unit Specifications: Gigabit (Gb) & Terabit (Tb)
BIPM Specification
[3]
NIST CUU (SI Prefixes & Decimal Multiples)·Conversion Factors & Mathematical Basis (Gb to Tb)
NIST CUU Reference

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