Data Storage Converter
Convert digital storage units between bytes, KB, MB, GB, TB and PB, using either decimal (1000) or binary (1024) sizes.
Download time estimate
Assumes 1 byte = 8 bits; real throughput is often 70–90% of rated Mbps.
All units at once
Binary prefixes follow IEC 80000-13. Exact-byte calculations use integer arithmetic.
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How to use
Convert between storage units, see exact byte counts, estimate download time at your Mbps, and export a full conversion table as CSV.
FAQ
What is the difference between decimal and binary?
Decimal kB, MB, GB, TB and PB use powers of 1000. Binary KiB, MiB, GiB, TiB and PiB use powers of 1024 under IEC 80000-13. They are separate units, not two definitions of KB or GB.
Which units are supported?
Bytes; decimal kB, MB, GB, TB and PB; and binary KiB, MiB, GiB, TiB and PiB.
Why does my drive show less space?
Drive makers normally use decimal units. Windows commonly reports binary capacity, so a 1 TB drive is about 931.32 GiB. Modern macOS reports storage in decimal units.
How is download time calculated?
Enter your download speed in Mbps. The tool converts your file size to bits and divides by speed — a rough estimate; real speeds vary with overhead and congestion.
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