Converter
Data Size Converter
Input
Enter a value and unit to convert across storage sizes.
Uses binary units where 1 KB = 1024 B.
Output
B1,073,741,824
KB1,048,576
MB1,024
GB1
TB0.001
Frequently Asked Questions
What is the difference between a kilobyte and a kibibyte?
A kilobyte (KB) in the decimal system equals 1,000 bytes. A kibibyte (KiB) in the binary system equals 1,024 bytes. Hard drive manufacturers use decimal (1 TB = 1,000 GB), while operating systems often use binary (1 TiB = 1,024 GiB), which is why a '1 TB' drive shows less in your OS.
How many bytes are in a gigabyte?
In the decimal (SI) system: 1 GB = 1,000,000,000 bytes (10^9). In the binary (IEC) system: 1 GiB = 1,073,741,824 bytes (2^30). Most storage devices advertise in decimal GB while operating systems display binary GiB, creating the apparent 'missing space' discrepancy.
Why do file sizes on disk sometimes differ from the file's actual size?
File systems allocate space in fixed-size 'clusters' or 'blocks' (typically 4 KB). Even a 1-byte file occupies one full cluster on disk. The 'size on disk' reflects allocated clusters; 'file size' reflects actual content bytes. Large numbers of small files waste proportionally more disk space.