Gigabytes to Bytes Converter
Enter the data size in gigabytes below to convert it to bytes.
Convert Gigabytes to Bytes
Enter a value in gigabytes (GB) to convert to bytes (B).
Gigabyte to Byte Conversion Table
Table showing various gigabyte measurements converted to bytes. Click any preset value or arrow to load it into the converter.
How to Convert Gigabytes to Bytes
To convert gigabytes to bytes, multiply the data size by the following conversion ratio: 1,000,000,000 bytes/gigabyte.
Since one gigabyte is equal to 1,000,000,000 bytes, you can use this simple formula to convert:
The data size in bytes is equal to the data size in gigabytes multiplied by 1,000,000,000.
For example, here's how to convert 5 gigabytes to bytes using the formula above.
How Many Bytes Are in a Gigabyte?
There are 1,000,000,000 bytes in a gigabyte, which is why we use this value in the formula above.
Our gigabyte to byte calculator automatically converts your data size measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Gigabytes and bytes 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 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 gigabytes (GB) and bytes (B), keep full floating-point precision (1 GB = 1,000,000,000 B; 1 B = 1e-9 GB) during intermediate calculations and round only the final byte figure to match your instrument tolerance.
More Gigabyte & Byte Conversions
Need to calculate in the opposite direction? Use our bytes to gigabytes calculator to switch your starting unit immediately. You can also explore related tools such as converting bytes to gigabytes, converting bits to bytes, or converting gigabytes to terabytes.
Frequently Asked Questions
References
- [1]NIST / IEC StandardNIST / IEC (IEC 80000-13 Binary Prefixes)·Digital Storage Metrology Standard — Gigabytes (GB) to Bytes (B)
- [2]BIPM SpecificationBIPM (SI Decimal Prefixes (k, M, G, T, P))·Unit Specifications: Gigabyte (Decimal) (GB) & Byte (B)
- [3]NIST CUU ReferenceNIST CUU (SI Prefixes & Decimal Multiples)·Conversion Factors & Mathematical Basis (GB to B)