Convert gigabytes to bytes
Converting gigabytes to bytes is a common data task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 GB equals 1,000,000,000 B, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert gigabytes to bytes
To convert gigabytes to bytes, multiply the number of gigabytes by 1,000,000,000. For example, 10 GB × 1,000,000,000 = 10,000,000,000 B.
B = GB × 1,000,000,000
- Write down the value in gigabytes you want to convert.
- Multiply it by 1,000,000,000 (the exact GB→B factor).
- The result is your value in bytes. Check it below with the converter or the table.
Conversion table
Common values of gigabytes and their equivalents in bytes:
| GB | B |
|---|---|
| 1 | 1,000,000,000 |
| 2 | 2,000,000,000 |
| 3 | 3,000,000,000 |
| 4 | 4,000,000,000 |
| 5 | 5,000,000,000 |
| 10 | 10,000,000,000 |
| 20 | 20,000,000,000 |
| 25 | 25,000,000,000 |
| 50 | 50,000,000,000 |
| 100 | 100,000,000,000 |
| 250 | 250,000,000,000 |
| 500 | 500,000,000,000 |
About these units
Gigabyte (GB). A gigabyte is 1,000 megabytes, roughly an hour of HD video or 250 songs. Smartphone storage, RAM and data plans are specified in gigabytes.
Byte (B). A byte is 8 bits and holds a single text character. It is the base unit for measuring digital information, from file sizes to memory capacity.
Frequently asked questions
How do I convert gigabytes to bytes?
To convert gigabytes to bytes, multiply the number of gigabytes by 1,000,000,000. For example, 10 GB × 1,000,000,000 = 10,000,000,000 B. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many bytes are in 1 gigabyte?
1 GB = 1,000,000,000 B. That is the fixed relationship used by this converter and by international standards.
How many gigabytes are in 1 byte?
1 B = 0.000000001 GB. If you are converting in the opposite direction, use our Byte to Gigabyte converter for the dedicated table and FAQ.
Is the gigabytes to bytes conversion exact?
Yes — this site uses decimal SI prefixes, so 1 KB = 1,000 bytes exactly. Note that some operating systems report file sizes in binary units (1 KiB = 1,024 bytes), which can make numbers differ slightly from storage labels.
What is gigabyte used for?
A gigabyte is 1,000 megabytes, roughly an hour of HD video or 250 songs. Smartphone storage, RAM and data plans are specified in gigabytes.