Gigabyte to Byte (GB to B) Converter
1 gigabyte equals 1,000,000,000 bytes (B) — multiply the number of gigabytes by 1,000,000,000 to convert. This is the decimal (SI) definition of the gigabyte used by drive manufacturers and most operating systems that report storage in base-10.
The formula
To convert gigabytes to bytes, multiply by 1,000,000,000:
B = GB × 1,000,000,000
For example, 4 GB × 1,000,000,000 = 4,000,000,000 bytes. To reverse it, divide bytes by 1,000,000,000.
Conversion table
| Gigabytes (GB) | Bytes (B) |
|---|---|
| 1 | 1,000,000,000 |
| 2 | 2,000,000,000 |
| 5 | 5,000,000,000 |
| 10 | 10,000,000,000 |
| 25 | 25,000,000,000 |
| 50 | 50,000,000,000 |
| 100 | 100,000,000,000 |
| 500 | 500,000,000,000 |
| 1,000 | 1,000,000,000,000 |
How to convert online
Avoid miscounting the zeros with the tool:
- Enter your gigabyte value in the first box.
- Read the byte result instantly in the second box.
- Or type a byte value to convert back to gigabytes — it works both ways.
Use the Gigabyte to Byte Converter — free and instant in your browser.
Where this conversion is used
Programmers and sysadmins hit this constantly: APIs, disk-quota settings and log files report sizes in raw bytes, while people think in gigabytes. Converting between the two helps set buffer sizes, validate uploads and reconcile the storage a drive advertises with what software reports.
FAQ
How many bytes are in a gigabyte?
One gigabyte equals 1,000,000,000 bytes under the decimal definition. Ten GB is 10,000,000,000 bytes.
What is the formula to convert gigabytes to bytes?
Multiply GB by 1,000,000,000: B = GB × 1,000,000,000.
How do I convert bytes back to gigabytes?
Divide the byte count by 1,000,000,000 (or multiply by 10⁻⁹). So 5,000,000,000 B = 5 GB.
Is the conversion exact?
Yes, in decimal terms. A binary gibibyte (GiB) is 1,073,741,824 bytes; this tool uses the decimal GB of exactly one billion bytes.
Related converters
- Byte to Gigabyte Converter
- Gigabyte to Bit Converter
- Gigabyte to Megabyte Converter
- Gigabyte to Kilobyte Converter
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