GB to Bytes Converter
Quick answer: To convert GB to bytes, multiply by 1,000,000,000. For example, 10 GB is 10,000,000,000 B. One gigabyte equals 1,000,000,000 B.
- Calculator
- Formula
- Examples
- Size compared
- About the units
- Where used
- Step by step
- Popular conversions
- Reading your result
- Mistakes
- FAQ
- Related tools
- Method
Use the GB to Bytes Converter
GB to Bytes formula and what each symbol means
B = GB × 1,000,000,000
| Symbol | Meaning |
|---|---|
| GB | Gigabyte |
| B | Byte |
GB to Bytes examples
1 GB
1 GB × 1,000,000,000 = 1,000,000,000 B.
10 GB
10 GB × 1,000,000,000 = 10,000,000,000 B.
100 GB
100 GB × 1,000,000,000 = 100,000,000,000 B.
GB compared with Bytes
One GB is 1,000,000,000 times as large as one B, so your number gets bigger when you convert GB to bytes and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About GB and bytes
Gigabyte (GB): 10⁹ bytes. Byte (B): A byte of 8 bits.
Where GB to bytes conversions are used
File sizes for email, uploads and downloads are quoted in kilobytes and megabytes. Memory (RAM) is usually specified in binary units.
How to calculate GB to Bytes step by step
- Enter the value in GB (the starting unit).
- Multiply by 1,000,000,000, because 1 GB = 1,000,000,000 B.
- The product is the value in B. To go back, divide by 1,000,000,000 or multiply by 1×10⁻⁹.
Popular data storage conversions
How to read your GB to Bytes result
Storage vendors use decimal prefixes (1 GB = 1,000,000,000 bytes), while many operating systems report binary values (1 GiB = 1,073,741,824 bytes), which is why a 500 GB drive can show about 465 GiB.
| GB | BYTES |
|---|---|
| 1 | 1,000,000,000 |
| 2 | 2,000,000,000 |
| 5 | 5,000,000,000 |
| 10 | 10,000,000,000 |
| 20 | 20,000,000,000 |
| 50 | 50,000,000,000 |
| 100 | 100,000,000,000 |
| 1,000 | 1,000,000,000,000 |
Bytes to GB: quick table
| BYTES | GB |
|---|---|
| 1 | 1×10⁻⁹ |
| 5 | 5×10⁻⁹ |
| 10 | 1×10⁻⁸ |
| 25 | 2.5×10⁻⁸ |
| 50 | 5×10⁻⁸ |
| 100 | 1×10⁻⁷ |
| 250 | 2.5×10⁻⁷ |
| 500 | 5×10⁻⁷ |
Common mistakes when calculating GB to Bytes
- Mixing bits and bytes: 8 bits make 1 byte.
- Dividing when you should multiply: from GB to B multiply by 1,000,000,000; from B to GB divide by 1,000,000,000.
GB to Bytes FAQ
How many B are in 1 GB?
1 GB equals 1,000,000,000 B.
How many GB are in 1 B?
1 B equals 1×10⁻⁹ GB.
Is 1 GB = 1,000,000,000 B an exact conversion?
Yes. The gigabyte and the byte are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 1,000,000,000 is just that ratio shown to 7 significant figures.
What is a gigabyte (GB)?
10⁹ bytes.
How can I estimate GB to bytes in my head?
One GB is 1,000,000,000 times as large as one B, so your number gets bigger when you convert GB to bytes and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
What is 0.5 GB in bytes?
0.5 GB = 500,000,000 B (since 0.5 × 1,000,000,000).
What is 25 GB in bytes?
25 GB = 25,000,000,000 B (since 25 × 1,000,000,000).
What is 80 GB in bytes?
80 GB = 80,000,000,000 B (since 80 × 1,000,000,000).
How many decimals should I keep when converting GB to B?
Match the precision of your original measurement. For example, 10,000,000,000 B rounds to 10,000,000,000 B at 3 significant figures; keep more digits only for engineering or scientific work.
More in Data Storage converters
- Bytes to TB Converter
- KB to Bits Converter
- Bytes to MB Converter
- KB to Bytes Converter
- Bytes to KB Converter
- KB to GB Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST: prefixes for binary multiples, NIST SP 811, Appendix B.8: conversion factors