How to Convert Gigabytes to Kilobytes (GB to KB)
Data conversions explain why a 1 TB drive shows less space on your computer and help compare mobile plans sold in gigabytes. This guide shows how to convert gigabytes into kilobytes by hand, with examples and a quick-reference table.
The conversion
To convert gigabytes to kilobytes, multiply the value by 1,000,000. To go the other way, divide by the same number (or multiply by 1.000000e-06). For a quick estimate, multiply by about 1,000,000.
Kilobytes = gigabytes × 1,000,000
Worked examples
- 3 GB = 3,000,000 KB
- 12.5 GB = 12,500,000 KB
- 75 GB = 75,000,000 KB
Gigabytes to Kilobytes table
| Gigabytes | Kilobytes |
|---|---|
| 1 GB | 1,000,000 KB |
| 2 GB | 2,000,000 KB |
| 5 GB | 5,000,000 KB |
| 10 GB | 10,000,000 KB |
| 20 GB | 20,000,000 KB |
| 25 GB | 25,000,000 KB |
| 50 GB | 50,000,000 KB |
| 100 GB | 100,000,000 KB |
| 250 GB | 250,000,000 KB |
| 500 GB | 500,000,000 KB |
| 1,000 GB | 1,000,000,000 KB |
Common questions
Is GB to KB exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Kilobytes to Gigabytes converter.
Mistakes to avoid
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Background
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Gigabytes to Kilobytes Converter or browse all data storage converters.
Run your own numbers: Gigabytes to Kilobytes Converter