Convert file and drive sizes across bytes, KB/MB/GB/TB and their binary siblings KiB/MiB/GiB.
How it works
- Choose the storage unit format (Decimal GB vs Binary GiB).
- Input the file size or drive capacity.
- The tool processes the bit-math locally to show exact bytes and multiples.
Frequently asked questions
Why does my 1 TB drive show 931 GB?
It holds 10¹² bytes; your OS reports in binary GiB (1024³), and 10¹² ÷ 1024³ ≈ 931.
Which should I use?
Match your context: storage products use decimal; RAM and many OS displays use binary.
Bits vs bytes?
8 bits = 1 byte. Internet speeds are usually megabits (Mb), file sizes megabytes (MB) — an 8× difference.