Gigabyte to Kilobyte (GB to KB) Converter
1 gigabyte equals 1,000,000 kilobytes (KB) — multiply the number of gigabytes by 1,000,000 to convert. Using the decimal (SI) system, 1 GB = 1,000 MB and 1 MB = 1,000 KB, so a gigabyte is exactly one million kilobytes.
The formula
To convert gigabytes to kilobytes, multiply by 1,000,000:
KB = GB × 1,000,000
For example, 3 GB × 1,000,000 = 3,000,000 KB. To reverse it, divide kilobytes by 1,000,000.
Conversion table
| Gigabytes (GB) | Kilobytes (KB) |
|---|---|
| 1 | 1,000,000 |
| 2 | 2,000,000 |
| 5 | 5,000,000 |
| 10 | 10,000,000 |
| 25 | 25,000,000 |
| 50 | 50,000,000 |
| 100 | 100,000,000 |
| 500 | 500,000,000 |
| 1,000 | 1,000,000,000 |
How to convert online
Let the tool handle the six zeros:
- Enter your gigabyte value in the first box.
- Read the kilobyte result instantly in the second box.
- Or type a kilobyte value to convert back to gigabytes — it works both ways.
Use the Gigabyte to Kilobyte Converter — free and instant in your browser.
Where this conversion is used
This is useful when a large allotment measured in gigabytes needs to be expressed in the smaller units used by config files, email attachment limits or older systems that report in kilobytes. It also helps estimate how many small KB-sized files a GB of space can hold.
FAQ
How many kilobytes are in a gigabyte?
One gigabyte equals 1,000,000 kilobytes in decimal terms. Ten GB is 10,000,000 KB.
What is the formula to convert gigabytes to kilobytes?
Multiply GB by 1,000,000: KB = GB × 1,000,000.
How do I convert kilobytes back to gigabytes?
Divide the kilobyte count by 1,000,000 (or multiply by 10⁻⁶). So 5,000,000 KB = 5 GB.
Is the conversion exact?
Yes, using the decimal convention. Binary units (KiB, GiB) give slightly different figures; this converter uses decimal GB and KB.
Related converters
- Kilobyte to Gigabyte Converter
- Gigabyte to Megabyte Converter
- Gigabyte to Byte Converter
- Gigabyte to Terabyte Converter
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