zztool About Data Units
Data units measure the size of digital information. The smallest unit is a bit, and 8 bits make 1 byte. This tool uses binary standard (base 1024), which is the most common calculation method in operating systems and programming.
Conversion Table
1 KB=1,024 Bytes
1 MB=1,024 KB
1 GB=1,024 MB
1 TB=1,024 GB
1 PB=1,024 TB
FAQ
Why is 1GB not equal to 1000MB?
Computers use binary system, so 1KB = 1024 Bytes, 1MB = 1024 KB, and so on. This differs from the decimal 1000.
Why does my hard drive show less capacity than advertised?
Hard drive manufacturers use decimal (1GB = 1000MB), while operating systems use binary (1GB = 1024MB). For example, a 500GB drive shows about 465GB in the system.
What is the difference between KB and KiB?
KB (Kilobyte) traditionally means 1024 bytes, while KiB (Kibibyte) is the IEC standard explicitly defining 1024 bytes. This tool uses the traditional 1024 base.
Last Updated: 2026-06-04✓ Expert Verified
GOOD
Quick data unit conversion!
Supports all units.
Very accurate results.