Byte and Data Size Converter — Free Online
Convert digital storage units online for free. Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes instantly.
About Byte/Bit Converter
Understanding data sizes is essential for storage planning, network bandwidth analysis, file management, and cloud storage decisions. Our byte converter handles all digital storage units: bits, bytes, kilobytes (KB), megabytes (MB), gigabytes (GB), terabytes (TB), petabytes (PB), and exabytes (EB). It supports both decimal SI units (1 KB = 1000 bytes) and binary IEC units (1 KiB = 1024 bytes) — a common source of confusion in storage marketing vs operating system reporting.
Frequently Asked Questions
How many bytes in a gigabyte?
In decimal (SI): 1 GB = 1,000,000,000 bytes. In binary (IEC): 1 GiB = 1,073,741,824 bytes.
Why does my hard drive show less space than advertised?
Drive manufacturers use decimal GB, but operating systems report in binary GiB, making the drive appear smaller.
What is the difference between a bit and a byte?
1 byte = 8 bits. Data storage is measured in bytes. Data speed is measured in bits per second.
How much can a terabyte store?
1 TB stores approximately 250,000 photos, 500 hours of HD video, or 200,000 songs.
What is the largest common unit of digital storage?
Common units go up to exabytes (EB). Beyond that are zettabytes (ZB) and yottabytes (YB).