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Gigabytes to Gigabits Converter

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

Convert Gigabytes to Gigabits

Enter a value in gigabytes (GB) to convert to gigabits (Gb).

Result
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40gigabits
5 GB = 40 Gb
Result updates automatically
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Reference:NIST / IEC (IEC 80000-13 Binary Prefixes)
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Gigabyte to Gigabit Conversion Table

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

Gigabytes (GB)Gigabits (Gb)
1 GB8 Gb
2 GB16 Gb
2.5 GB20 Gb
5 GB40 Gb
10 GB80 Gb
15 GB120 Gb
20 GB160 Gb
25 GB200 Gb
30 GB240 Gb
50 GB400 Gb

How to Convert Gigabytes to Gigabits

To convert gigabytes to gigabits, multiply the data size by the following conversion ratio: 8 gigabits/gigabyte.

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

gigabits = gigabytes × 8

The data size in gigabits is equal to the data size in gigabytes multiplied by 8.

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

gigabits = (5 GB × 8) = 40 Gb

How Many Gigabits Are in a Gigabyte?

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

1 GB = 8 Gb|1 Gb = 0.125 GB

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

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

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. [1]

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.

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.

When converting data size between gigabytes (GB) and gigabits (Gb), keep full floating-point precision (1 GB = 8 Gb; 1 Gb = 0.125 GB) during intermediate calculations and round only the final gigabit figure to match your instrument tolerance.

More Gigabyte & Gigabit Conversions

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

Frequently Asked Questions

There are 8 gigabits (Gb) in 1 gigabyte (GB). Conversely, 1 gigabit (Gb) is equal to 0.125 gigabytes (GB).

References

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