1 Gigabyte equals 1,000,000 Kilobytes.
| Gigabyte (GB) | Kilobyte (kB) |
|---|---|
| 1 GB | 1,000,000 kB |
| 2 GB | 2,000,000 kB |
| 4 GB | 4,000,000 kB |
| 8 GB | 8,000,000 kB |
| 16 GB | 16,000,000 kB |
| 32 GB | 32,000,000 kB |
| 64 GB | 64,000,000 kB |
| 128 GB | 128,000,000 kB |
| 256 GB | 256,000,000 kB |
| 512 GB | 512,000,000 kB |
| 1,024 GB | 1,024,000,000 kB |
| 2,048 GB | 2,048,000,000 kB |
To convert Gigabytes to Kilobytes, multiply the value by 1,000,000. This factor comes from the ratio of the two units' definitions: one Gigabyte equals 1,000,000 Kilobytes.
For example: 1 Gigabyte = 1,000,000 Kilobytes, and 10 Gigabytes = 10,000,000 Kilobytes.
To convert in the reverse direction — from Kilobytes to Gigabytes — multiply by 1e-6.
A gigabyte (GB) in the SI convention equals exactly 1,000,000,000 bytes (10⁹ bytes). The everyday unit of personal computing storage and RAM, the gigabyte has gone from extraordinary to ordinary in under three decades: in 1991, a 1 GB hard drive cost around $3,000 and was considered massive; today, 1 GB is a modest fraction of a smartphone's storage. Modern computers typically have 8–32 GB of RAM and hundreds of gigabytes of SSD storage.
Digital media files that define the gigabyte era: a feature film at 1080p takes 4–15 GB; a video game installation might require 50–100 GB; a 4K Blu-ray disc holds up to 100 GB; and an hour of 4K video shot on a professional camera can fill 50–200 GB. Streaming services compress content dramatically — Netflix streams 4K at about 7 GB/hour — but the underlying uncompressed files are far larger.
Mobile data plans are measured in gigabytes: "10 GB per month" is a typical moderate plan for a smartphone user in many countries. Cloud storage services offer gigabytes of free space (Google Drive gives 15 GB; Dropbox gives 2 GB free). Database sizes for small to medium businesses are typically in the gigabyte range; large enterprise databases reach into the terabytes. The gigabyte thus sits at the sweet spot of human-scale digital data — large enough to matter, small enough to count.
A kilobyte (kB) in the SI (decimal) convention equals exactly 1,000 bytes. The prefix "kilo" follows the standard SI usage, the same as in kilogram or kilometer. In consumer contexts, storage device manufacturers use this SI definition — so a "100 GB" SSD contains 100,000,000,000 bytes. This is distinct from the binary kibibyte (KiB = 1,024 bytes) used in computing contexts where powers of 2 are natural. The discrepancy has caused persistent confusion in the industry for decades.
Historically, computer scientists used "kilobyte" to mean 1,024 bytes (since 1,024 = 2¹⁰ is conveniently close to 1,000), and this usage dominated from the 1970s through the 1990s. Operating systems like Windows still report file sizes using binary multiples while calling them "KB" — a source of endless consumer confusion when a file advertised as "1 GB" seems smaller on disk. The IEC introduced the kibibyte (KiB), mebibyte (MiB) etc. in 1998 to create unambiguous binary units, but adoption has been slow.
A plain-text email typically ranges from 2–20 kilobytes; a web page with minimal graphics might be 50–500 kB; and a high-quality music file compressed as MP3 runs about 1,000 kB (1 MB) per minute of audio. The kilobyte marked the practical lower bound of early personal computing storage: the original IBM PC's minimum RAM was 16 kB, and floppy disks of the era held 160–360 kB. These figures highlight how dramatically data storage has scaled in forty years.
1 Gigabyte equals 1,000,000 Kilobytes.
To convert Gigabytes to Kilobytes, multiply by 1,000,000. For example, 0.1 Gigabytes = 100,000 Kilobytes.
1 Kilobyte equals 1e-6 Gigabytes.