File Size Calculator
Convert file sizes between different units.
Frequently Asked Questions
What is the difference between KB, MB, and GB?
1 KB = 1024 Bytes, 1 MB = 1024 KB, 1 GB = 1024 MB, 1 TB = 1024 GB. Each unit is 1024 times the previous one. Some manufacturers use a factor of 1000, which is why disk sizes may appear different.
Why is 1024 used instead of 1000?
Computers use a binary system. Since 2 to the power of 10 is 1024, 1024 is used as the standard in data storage. The 1000-based system (SI) is denoted as kB, MB, GB.
Why does my disk show less free space than advertised?
Disk manufacturers calculate 1 GB as 1,000,000,000 bytes, while the operating system shows 1 GB as 1,073,741,824 bytes. Due to this difference, a 500 GB disk appears as approximately 465 GB on the computer.
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