How do you convert terabytes to gigabits?

To convert terabytes (TB) to gigabits (Gb), multiply the data size in terabytes by 8,000 (gigabits = terabytes × 8,000).

What is 5 terabytes in gigabits?

5 terabytes (5 TB) is equal to 40,000 gigabits (40,000 Gb).

Which is larger, 1 terabyte (decimal) (TB) or 1 gigabit (Gb)?

One terabyte (decimal) (TB) is larger than one gigabit (Gb). Specifically, 1 TB contains 8,000 Gb, whereas 1 Gb is 0.000125 TB.

How do I convert back from gigabits (Gb) to terabytes (TB)?

To reverse the calculation from Gb to TB, multiply your gigabit value by the inverse factor 0.000125 (or divide by 8,000). 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 TB and Gb?

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).

Terabytes to Gigabits Converter

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

Gigabits to Terabytes (Gb → TB)

Convert Terabytes to Gigabits

Enter a value in terabytes (TB) to convert to gigabits (Gb).

Value (TB)

From

Result

•

40,000gigabits

5 TB = 40,000 Gb

Result updates automatically

Get Widget

Suggested Conversions

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

[1–3] ↓

Terabyte to Gigabit Conversion Table

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

Terabytes (TB)	Gigabits (Gb)
1 TB	8,000 Gb
2 TB	16,000 Gb
2.5 TB	20,000 Gb
5 TB	40,000 Gb
10 TB	80,000 Gb
15 TB	120,000 Gb
20 TB	160,000 Gb
25 TB	200,000 Gb
30 TB	240,000 Gb
50 TB	400,000 Gb

How to Convert Terabytes to Gigabits

To convert terabytes to gigabits, multiply the data size by the following conversion ratio: 8,000 gigabits/terabyte.

Since one terabyte is equal to 8,000 gigabits, you can use this simple formula to convert:

gigabits = terabytes × 8,000

The data size in gigabits is equal to the data size in terabytes multiplied by 8,000.

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

gigabits = (5 TB × 8,000) = 40,000 Gb

How Many Gigabits Are in a Terabyte?

There are 8,000 gigabits in a terabyte, which is why we use this value in the formula above.

1 TB = 8,000 Gb|1 Gb = 0.000125 TB

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

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

What Is a Terabyte?

A terabyte is a unit of data size equal to 1e+12 bytes (B), the base unit for data size. SI decimal standard: 1,000,000,000,000 bytes (1,000 GB). [1]

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

In the metric system, "tera" is the standard SI prefix for trillions, or 10¹². This makes the terabyte (TB) a convenient decimal multiple of the byte (B).

In practice, terabytes (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 terabytes in our Digital Storage Converter.

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). [2]

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.

When converting data size between terabytes (TB) and gigabits (Gb), keep full floating-point precision (1 TB = 8,000 Gb; 1 Gb = 0.000125 TB) during intermediate calculations and round only the final gigabit figure to match your instrument tolerance.

More Terabyte & Gigabit Conversions

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

Convert from Terabytes

Convert to Gigabits

Frequently Asked Questions

There are 8,000 gigabits (Gb) in 1 terabyte (TB). Conversely, 1 gigabit (Gb) is equal to 0.000125 terabytes (TB).

Digital Storage Converter

Quick Info

Direct Factor: 1 terabyte (decimal) (TB) equals 8,000 gigabits (Gb).
Inverse Factor: 1 gigabit (Gb) equals 0.000125 terabytes (TB).
Formula: gigabits = terabytes × 8,000.
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

Terabyte (Decimal) (TB)

SI decimal standard: 1,000,000,000,000 bytes (1,000 GB).

Gigabit (Gb)

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

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

Related Categories

Add This Calculator to Your Site

Free HTML widget · 4 embed formats

Embed the interactive Terabytes to Gigabits converter on your blog, classroom, or documentation page.

Customize & Get Embed Code

References

NIST · BIPM · ISO

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

Measurement Navigator78 Categories9 Scientific Domains

Browse All 78 Measurement Categories

A–Z Directory →Sitemap

Common ConvertersEveryday metric, imperial, and US customary converters for length, weight, volume, temperature, area, pressure, energy, speed, time, and data.