Gigabytes (GB) to Kilobytes (KB) Converter
The Gigabytes (GB) to Kilobytes (KB) Converter turns your Gigabyte (GB) value into Kilobytes (KB). Type your storage value in the input field — 1 GB = 1,000,000 KB, calculated across both decimal (SI) and binary (IEC) standards.
Gigabytes (GB) to Kilobytes (KB) Converter
How to Convert Gigabytes to Kilobytes
To convert gigabytes to kilobytes, multiply by 1,000,000 (using SI decimal). Both units measure storage capacity—the difference is scale. See also: Kilobytes to Gigabytes conversion.
GB: A gigabyte is 1,000 megabytes or 1,000,000,000 bytes using the SI decimal standard. This is what hard drive manufacturers typically use. Try the GB to Yobibits converter.
KB: A kilobyte is 1,000 bytes using the SI decimal standard. Commonly used for small file sizes. Check out our Kibibits to KB calculator.
1 GB = 1,000,000 KB (using SI decimal standard) — which means there are 1,000,000kilobytes in every gigabyte.
GB to KB Conversion Formula
// Convert GB to KB
KB = GB × 1,000,000
// Reverse: Convert KB to GB
GB = KB × 0.000001Gigabyte to Kilobyte Conversion Examples
100 GB = 100,000,000 KB
256 GB = 256,000,000 KB
500 GB = 500,000,000 KB
1,000 GB = 1,000,000,000 KB
2,048 GB = 2,048,000,000 KB
Binary Standard (Base 1024)
Using binary calculation: 1 GB = 1,048,576 KB
100 GB = 104,857,600 KB
1,000 GB = 1,048,576,000 KB
1,024 GB = 1,073,741,824 KB
What Is a Gigabyte (GB)? Definition and Uses
A gigabyte is 1,000 megabytes or 1,000,000,000 bytes using the SI decimal standard. This is what hard drive manufacturers typically use. Use our convert MB to Exbibits.
The gigabyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Check out our Megabytes Per Second to KiB/s.
Common uses: Movies, video games, smartphone storage, USB drives, cloud storage plans Related: how many Zib in Gigabytes.
1 GB = 8 × 10⁹ bits = 1 × 10⁹ bytes.
The gigabyte can be abbreviated as GB; for example, 1 gigabyte can be written as 1 GB.
What Is a Kilobyte (KB)? Definition and Uses
A kilobyte is 1,000 bytes using the SI decimal standard. Commonly used for small file sizes. Use our how many Kilobytes in a b.
The kilobyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Related: calculate MB to Kb.
Common uses: Text documents, small images, email attachments, configuration files Try the Yibps to Kbps conversion rate.
1 KB = 8,000 bits = 1,000 bytes.
The kilobyte can be abbreviated as KB; for example, 1 kilobyte can be written as 1 KB.
Gigabyte to Kilobyte Conversion Table
The table below shows various gigabyte measurements converted to kilobytes.
| Gigabytes | Kilobytes | Kilobytes (Binary) |
|---|---|---|
| 1 GB | 1,000,000 KB | 1,048,576 KB |
| 2 GB | 2,000,000 KB | 2,097,152 KB |
| 5 GB | 5,000,000 KB | 5,242,880 KB |
| 10 GB | 10,000,000 KB | 10,485,760 KB |
| 25 GB | 25,000,000 KB | 26,214,400 KB |
| 50 GB | 50,000,000 KB | 52,428,800 KB |
| 100 GB | 100,000,000 KB | 104,857,600 KB |
| 128 GB | 128,000,000 KB | 134,217,728 KB |
| 250 GB | 250,000,000 KB | 262,144,000 KB |
| 256 GB | 256,000,000 KB | 268,435,456 KB |
| 500 GB | 500,000,000 KB | 524,288,000 KB |
| 512 GB | 512,000,000 KB | 536,870,912 KB |
| 1,000 GB | 1,000,000,000 KB | 1,048,576,000 KB |
| 1,024 GB | 1,024,000,000 KB | 1,073,741,824 KB |
SI Decimal vs Binary: Why Two Different Standards?
When converting gigabytes to kilobytes, different tools may give slightly different results. This is because there are two competing standards for measuring digital storage:
| Standard | Base | 1 KB equals | Used By |
|---|---|---|---|
| SI Decimal | 1000 | 1,000 bytes | Hard drive manufacturers, macOS, network speeds |
| Binary (IEC) | 1024 | 1,024 bytes | Windows, Linux (partially), RAM specifications |
Note: Our calculator defaults to SI decimal (base 1000) to match the box label. To match Windows, toggle the standard at the top of the calculator.