Convert Gigabytes to Kilobytes (GB to kB)
1 gigabyte (GB) = 1000000 kilobytes (kB). 1 kB = 0.000001 GB. Example: 15 GB = 15 × 1000000 = 15000000 kB.
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1 GB = 1000000 kB
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabyte to kilobyte converter to paste a column from Excel.
How to Convert Gigabyte to Kilobyte
- 1 GB = 1000000 kB
- 1 kB = 0.000001 GB
- Example: convert 15 GB to kB: 15 GB = 15 × 1000000 kB = 15000000 kB
Formula
kB = GB × 1000000
Derivation from SI units:
- 1 GB = 10⁹ bytes = 8 × 10⁹ bits (decimal, SI).
- 1 kB = 1000 bytes = 8000 bits (decimal, SI).
- 1 GB = 8000000000 bit ÷ 8000 bit per kB = 1000000 kB
Both units are defined exactly, so the factor is exact. Gigabyte definition: gigabyte; Kilobyte definition: kilobyte.
Worked examples
- A reading of 16 GB converts to 16000000 kB.
16 GB × 1000000 = 16000000 kB - A value of 128 GB is 128000000 kB.
128 GB × 1000000 = 128000000 kB
Gigabyte to Kilobyte conversion table
| Gigabytes (GB) | Kilobytes (kB) |
|---|---|
| 1 GB | 1000000 kB |
| 2 GB | 2000000 kB |
| 4 GB | 4000000 kB |
| 8 GB | 8000000 kB |
| 16 GB | 16000000 kB |
| 32 GB | 32000000 kB |
| 64 GB | 64000000 kB |
| 100 GB | 100000000 kB |
| 128 GB | 128000000 kB |
| 256 GB | 256000000 kB |
| 500 GB | 500000000 kB |
| 1000 GB | 1000000000 kB |
Where it's used
Gigabytes are used for phone and laptop storage, while kilobytes appear in small files, emails and web pages. Both measure amount of digital information, so the conversion is a fixed factor.
Gigabyte to other data storage units
| Conversion | 1 GB equals |
|---|---|
| gigabyte to kilobyte | 1000000 kB |
| gigabyte to byte | 1000000000 B |
| gigabyte to megabyte | 1000 MB |
| gigabyte to terabyte | 0.001 TB |
| gigabyte to bit | 8000000000 bit |
| gigabyte to megabit | 8000 Mbit |
| gigabyte to kibibyte | 976562.5 KiB |
| gigabyte to mebibyte | 953.6743164 MiB |
Show 5 more units
| gigabyte to gibibyte | 0.9313225746 GiB |
|---|---|
| gigabyte to kilobit | 8000000 kbit |
| gigabyte to gigabit | 8 Gbit |
| gigabyte to petabyte | 0.000001 PB |
| gigabyte to tebibyte | 0.0009094947018 TiB |
Frequently asked questions
How many kilobytes are in 1 gigabyte?
1 GB = 1000000 kB.
How do I convert gigabytes to kilobytes?
Multiply the value in GB by 1000000. For example, 15 GB × 1000000 = 15000000 kB.
Is the GB to kB conversion exact?
Yes. Both units are defined exactly, and 1 GB is exactly 1000000 kB.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Gigabytes to Kilobytes (GB to kB). Retrieved October 25, 2026, from https://scientificconverters.com/data-storage/gigabytes-to-kilobytes/
IEEE
Scientific Converters, "Convert Gigabytes to Kilobytes (GB to kB)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/data-storage/gigabytes-to-kilobytes/