Gigabits to Bytes Converter
Enter the data size in gigabits below to convert it to bytes.
Convert Gigabits to Bytes
Enter a value in gigabits (Gb) to convert to bytes (B).
Gigabit to Byte Conversion Table
Table showing various gigabit measurements converted to bytes. Click any preset value or arrow to load it into the converter.
How to Convert Gigabits to Bytes
To convert gigabits to bytes, multiply the data size by the following conversion ratio: 125,000,000 bytes/gigabit.
Since one gigabit is equal to 125,000,000 bytes, you can use this simple formula to convert:
The data size in bytes is equal to the data size in gigabits multiplied by 125,000,000.
For example, here's how to convert 5 gigabits to bytes using the formula above.
How Many Bytes Are in a Gigabit?
There are 125,000,000 bytes in a gigabit, which is why we use this value in the formula above.
Our gigabit to byte calculator automatically converts your data size measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Gigabits and bytes 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.
What Is a Byte?
8 binary bits. It serves as a primary reference unit for measuring data size across scientific and practical applications. [2]
The byte is classified as an IEC binary unit of data size. Bytes can be abbreviated as B; for example, 1 byte can be written as 1 B.
As the primary coherent reference unit for data size in this category, all other data size units are mathematically anchored to the byte (B).
In practice, bytes (B) are widely used across standard data size applications within IEC binary workflows, engineering documentation, and technical data sheets.
When converting data size between gigabits (Gb) and bytes (B), keep full floating-point precision (1 Gb = 125,000,000 B; 1 B = 8e-9 Gb) during intermediate calculations and round only the final byte figure to match your instrument tolerance.
More Gigabit & Byte Conversions
Need to calculate in the opposite direction? Use our bytes to gigabits calculator to switch your starting unit immediately. You can also explore related tools such as converting bytes to gigabits, converting bits to bytes, or converting megabytes to gigabytes.
Frequently Asked Questions
References
- [1]NIST / IEC StandardNIST / IEC (IEC 80000-13 Binary Prefixes)·Digital Storage Metrology Standard — Gigabits (Gb) to Bytes (B)
- [2]BIPM SpecificationBIPM (SI Decimal Prefixes (k, M, G, T, P))·Unit Specifications: Gigabit (Gb) & Byte (B)
- [3]NIST CUU ReferenceNIST CUU (SI Prefixes & Decimal Multiples)·Conversion Factors & Mathematical Basis (Gb to B)