Data Size Converter
Convert between bytes, KB, MB, GB, TB, and binary units
Read the full guideDecimal vs Binary Units
SI
Decimal (SI Units)
Used by storage manufacturers. Based on powers of 1000.
- 1 KB = 1,000 bytes
- 1 MB = 1,000 KB = 1,000,000 bytes
- 1 GB = 1,000 MB = 1,000,000,000 bytes
- 1 TB = 1,000 GB
IEC
Binary (IEC Units)
Used by operating systems. Based on powers of 1024.
- 1 KiB = 1,024 bytes
- 1 MiB = 1,024 KiB = 1,048,576 bytes
- 1 GiB = 1,024 MiB = 1,073,741,824 bytes
- 1 TiB = 1,024 GiB
Why does my drive show less space? A "1 TB" drive (1,000,000,000,000 bytes) shows as ~931 GiB in your OS because it uses binary calculation.
Common File Sizes
Text document (1 page)~10 KB
MP3 song (4 min)~4 MB
JPEG photo (12 MP)~3-5 MB
HD Video (1 hour)~3-4 GB
4K Video (1 hour)~20-30 GB
Blu-ray movie~25-50 GB