File Size Calculator
Convert file sizes between different units (bytes, KB, MB, GB, TB, PB)
📊 Binary (IEC Standard)
• 1 KiB = 1,024 Bytes
• 1 MiB = 1,024 KiB
• 1 GiB = 1,024 MiB
Used by operating systems and memory
📊 Decimal (SI Standard)
• 1 KB = 1,000 Bytes
• 1 MB = 1,000 KB
• 1 GB = 1,000 MB
Used by storage manufacturers and networks
⚠️ Important Note
The difference between binary and decimal calculations can be significant for large files. For example, a 1 TB hard drive (decimal) is actually about 931 GiB (binary), which is why your operating system might show less capacity than advertised.