How this tool works
The tool converts every value to bytes, then divides by the exact size of the selected output unit. SI units such as GB use powers of 1,000; IEC units such as GiB use powers of 1,024.
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Data Storage Converter
Convert decimal SI and binary IEC storage without calling two different units by the same name. This fixes the common 1,000-versus-1,024 confusion.
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GB and GiB are not interchangeable. Decimal units use powers of 1,000; binary IEC units use powers of 1,024.
Advertised 1 TB drive in GiB≈ 931.323 GiB
1 TiB expressed in GB≈ 1,099.512 GB
When it is useful
Use it when comparing advertised drive capacity with operating-system displays, planning cloud storage, checking upload limits, sizing backups or translating technical specifications.
Accuracy and unit standards
One GB is exactly 1,000,000,000 bytes. One GiB is exactly 1,073,741,824 bytes. Some software labels GiB values as ‘GB’; the calculator keeps them separate so the numerical result remains honest.