GB to KB
Convert gigabytes (GB) to kilobytes (KB) instantly — live conversion and a full reference table, 100% in your browser.
Input
Result
Reference table (1-100 GB)
| GB | KB | GB | KB |
|---|
What is a gigabyte?
A gigabyte (symbol: GB) is a unit of digital information storage equal to 1024 megabytes, or approximately 1 billion bytes (1,073,741,824 bytes). It is the standard unit for measuring storage capacity of hard drives, SSDs, USB flash drives, and smartphone storage. A typical HD movie is about 4-8 GB, and a modern smartphone has 128-512 GB of storage.
The gigabyte is one of the most commonly encountered storage units. Whether you are buying a new device, downloading a large file, or checking available disk space, understanding gigabytes is essential in modern computing.
What is a kilobyte?
A kilobyte (symbol: KB) is a unit of digital information storage equal to 1024 bytes in the binary system. The prefix kilo means one thousand in the metric system, but in computing it refers to 1024 (2^10) because computers operate in binary. One kilobyte can store approximately 1000 characters of text.
Kilobytes are used for measuring small files such as text documents, configuration files, icons, and network packets. They are the smallest commonly-used unit in the digital storage hierarchy.
GB vs KB
Gigabytes and kilobytes differ by a factor of 1,048,576 (1024 x 1024). The table below shows the dramatic scale difference:
| Feature | Gigabyte (GB) | Kilobyte (KB) |
|---|---|---|
| Size | 1 GB = 1,048,576 KB | 1 KB = 1024 bytes |
| Equals | 1,073,741,824 bytes | 1024 bytes |
| Best for | Large storage — drives, movies, OS | Tiny files — text, config, icons |
One gigabyte equals over one million kilobytes. Converting GB to KB is useful when you need to break down large storage values into granular kilobyte-sized chunks.
When to convert GB to KB
Converting gigabytes to kilobytes is useful when you need granular file-size information from a large storage value. Common scenarios include calculating how many KB-sized files can fit on a GB-sized drive, configuring systems that report in KB, and performing detailed storage analysis where KB precision is required.
Developers and system administrators use GB-to-KB conversions when setting file size limits, analyzing disk usage at a granular level, and configuring applications that accept size parameters in kilobytes.
How to convert GB to KB
To convert gigabytes to kilobytes, multiply by 1,048,576 (which is 1024 x 1024). For example, 1 GB x 1,048,576 = 1,048,576 KB, and 5 GB x 1,048,576 = 5,242,880 KB. This two-step binary conversion goes from GB through MB to KB.
This tool performs the calculation instantly: enter a GB value and get the KB equivalent immediately, along with a reference table covering 1-100 GB. All processing happens locally in your browser with no data uploaded.
How do you convert GB to KB?
Multiply the gigabyte value by 1,048,576: KB = GB x 1024 x 1024. For example, 2 GB = 2 x 1,048,576 = 2,097,152 KB.
How many KB are in 1 GB?
There are 1,048,576 KB in 1 GB (binary). This is 1024 x 1024, going from GB through MB to KB.
Why multiply by 1,048,576 and not 1,000,000?
Computers use binary, so each step multiplies by 1024. Going from GB to KB requires two steps: GB to MB (1024), then MB to KB (1024), giving 1024 x 1024 = 1,048,576.
Are my inputs uploaded to a server?
No. All calculations run locally in your browser. Nothing is uploaded.