How to convert gigabytes to bytes
To convert gigabytes to bytes, multiply by 1,000,000,000. Data size conversions matter for file uploads, cloud storage plans, hard drives and internet usage. Decimal (SI) prefixes are used: 1 KB = 1,000 bytes.
Gigabyte to Byte conversion table
| Gigabyte (GB) | Byte (B) |
|---|---|
| 0.1 GB | 100,000,000 B |
| 0.5 GB | 500,000,000 B |
| 1 GB | 1,000,000,000 B |
| 2 GB | 2,000,000,000 B |
| 3 GB | 3,000,000,000 B |
| 4 GB | 4,000,000,000 B |
| 5 GB | 5,000,000,000 B |
| 10 GB | 10,000,000,000 B |
| 20 GB | 20,000,000,000 B |
| 25 GB | 25,000,000,000 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 |
About the units
Gigabyte (GB)
A gigabyte is 1,000,000,000 bytes and the common unit for phone storage and data plans.
Byte (B)
A byte is 8 bits and typically stores one character of text.
How to use this converter
- Type the number of gigabytes (GB) in the input box.
- The result in bytes appears instantly — no button needed.
- See the same value in every other data storage unit just below.
- Use “Swap units” to convert bytes back to gigabytes.
When you’ll use the gigabyte to byte conversion
Converting gigabytes to bytes comes up more often than you might expect — for example when estimating download times, comparing phone or cloud storage plans, or checking whether a file fits an upload limit. Type your number once and you get the exact answer plus every related unit, so you don’t need to convert twice.
💡 The factor is exact and easy to remember: 1 GB = 1,000,000,000 B.
Watch out for these mix-ups
- Drive makers use 1 KB = 1,000 bytes; operating systems often show KiB (1,024).
- Internet speeds are in bits per second, file sizes in bytes — a factor of 8.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many bytes are in one gigabyte?
One gigabyte equals 1,000,000,000 bytes. 1,000,000,000 is the exact factor used by this converter.
How do I convert gigabytes to bytes?
Multiply the value in gigabytes by 1,000,000,000. To go the other way, multiply bytes by 1e-9.
What is 10 GB in B?
10 GB = 10,000,000,000 B. Also, 5 GB = 5,000,000,000 B and 100 GB = 100,000,000,000 B.
What is the difference between a gigabyte and a byte?
A gigabyte is 1,000,000,000 bytes and the common unit for phone storage and data plans. A byte is 8 bits and typically stores one character of text.
Is this tool free and private?
Yes — the Gigabyte to Byte is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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