Gigabytes (GB) to Bytes (B) Converter
Convert gigabytes to bytes.
1 GB = 1,000,000,000 B
How to convert GB to Bytes (B)
File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Gigabyte is 109 bytes and 1 Byte is 100 bytes. Divide one by the other and you get the ratio between the two units: 109 ÷ 100 = 109.
Gigabyte is the bigger unit, so you multiply. Every GB holds 1,000,000,000 B, which means the decimal point moves 9 places to the right.
On the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB) these two are 3 steps apart. Every step is a factor of 1,000, so 3 steps means 1,000 multiplied by itself 3 times, which is 109.
The formula
Bytes (B) = GB × 1,000,000,0001 GB = 1,000,000,000 B
Worked example 1: Converting 4.7 GB
4.7 GB × 1,000,000,000 = 4,700,000,000 BThe decimal point moves 9 places to the right.
4.7 GB is the capacity of a single-layer DVD.
Worked example 2: Converting 0.5 GB
0.5 GB × 1,000,000,000 = 500,000,000 BThe decimal point moves 9 places to the right.
Worked example 3: Converting 12.75 GB
12.75 GB × 1,000,000,000 = 12,750,000,000 BThe decimal point moves 9 places to the right.
Need the other direction? Open the Bytes (B) to GB converter.
GB to Bytes (B) examples
4.7 GB is the capacity of a single-layer DVD. In bytes that is 4,700,000,000 B.
| GB | B |
|---|---|
| 1 GB | 1,000,000,000 B |
| 2.5 GB | 2,500,000,000 B |
| 10 GB | 10,000,000,000 B |
| 50 GB | 50,000,000,000 B |
| 100 GB | 100,000,000,000 B |
| 500 GB | 500,000,000,000 B |
| 1,000 GB | 1,000,000,000,000 B |
Where GB to Bytes (B) comes up
A gigabyte is 1,000 megabytes, about 250 photos at 4 MB each. Gigabytes are the language of phone storage, RAM, mobile data plans, game installs and USB sticks.
A byte is eight bits, enough to store one character of plain English text. Bytes show up whenever you need the exact number: file properties, HTTP headers, memory buffers, database column limits and the counts programs print in logs.
Bytes are the base unit, so this gives the exact count that programs, APIs and file properties report.
Going from gigabytes down to bytes always gives a bigger number, because the unit you land on is smaller. It is the usual direction when a limit or a form asks for a smaller unit than the one you have in mind.
GB to Bytes (B) FAQ
How many bytes are in 1 gigabyte?
There are 1,000,000,000 bytes in 1 gigabyte, so 1 GB = 1,000,000,000 B.
Is GB to B decimal or binary?
This page is decimal (SI), where 1 KB = 1,000 B. Operating systems often count in powers of 1,024 and still print KB, MB or GB, when they really mean KiB, MiB and GiB. At GB the two systems differ by about 7.4%.
How do I convert B to GB?
Go the other way: divide by 1,000,000,000, which moves the decimal point 9 places to the left. The swap button on the converter does it for you.