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Data Size Converter
Convert digital storage between bytes, KB/MB/GB (decimal) and KiB/MiB/GiB (binary), plus bits. Understand the difference between a marketed 'GB' and what your OS reports.
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💡 Good to know: A "kilobyte" can mean 1,000 or 1,024 bytes — that mismatch is why a "1 TB" drive shows about 931 GB in your OS.
Worked example
1 Bytes = 0.001 KB
Units
Bytes · KB · MB · GB · TB · KiB · MiB · GiB · Bits
Frequently asked
Why is a 1 TB drive smaller in my OS?
Drives use decimal TB (1e12 bytes); operating systems often show binary TiB (1.0995e12 bytes) — this tool shows both.
What's the difference between KB and KiB?
KB is 1,000 bytes; KiB is 1,024 bytes.