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Convert gigabytes to bytes
Instant, accurate GB → B conversion with a live converter, table and formula.
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1 gigabyte = 1000000000 bytes
1 byte = 1e-9 gigabytes
gigabytes to bytes table
| gigabytes (GB) | bytes (B) |
|---|---|
| 0.5 | 500000000 |
| 1 | 1000000000 |
| 2 | 2000000000 |
| 5 | 5000000000 |
| 10 | 10000000000 |
| 20 | 20000000000 |
| 50 | 50000000000 |
| 100 | 100000000000 |
| 500 | 500000000000 |
| 1000 | 1000000000000 |
Formula
bytes = gigabytes × 1000000000.
Example
10 gigabytes = 10000000000 bytes.
What is a gigabyte?
A gigabyte (GB) is 1,000 megabytes — a few hours of video.
What is a byte?
A byte (B) is 8 bits, the basic unit of digital information (one character).
Real-world reference points
A photo is a few MB; an MP3 song ~4 MB; an HD movie ~4 GB; a modern phone stores 128+ GB.
| Reference | gigabytes | bytes |
|---|---|---|
| E-mail (text only) | 0.00002 GB | 20,000 B |
| Smartphone photo | 0.003 GB | 3,000,000 B |
| MP3 song | 0.004 GB | 4,000,000 B |
| DVD capacity | 4.7 GB | 4,700,000,000 B |
| HD movie stream | 4 GB | 4,000,000,000 B |
Mistakes to avoid with data conversions
- Megabits vs megabytes: your '100 Mbps' connection downloads at ~12.5 MB/s — ISPs quote bits, files are bytes.
- Decimal vs binary units: drives are sold in decimal GB (10⁹), so a '1 TB' drive shows ~931 'GB' (GiB) in Windows.
- Assuming video size scales with length only — resolution and bitrate matter more than minutes.
Frequently asked questions
How many bytes in a gigabytes?+
1 gigabyte = 1000000000 bytes.
How do I convert gigabytes to bytes?+
Enter the value in the gigabytes box above and the bytes value appears instantly. You can also type in the bytes box to convert the other way.
Is this GB to B converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.