Conversions Conversion Chart

Digital Storage Conversion Chart (KB/MB/GB/TB)

Published September 8, 2026

Conversion factors for digital storage units, covering both the decimal and binary conventions. For the reasoning behind these numbers, see Bytes, KB, MB, GB and TB Explained.

Decimal (Marketing/Storage) vs Binary (OS-Reported)

Decimal Unit Bytes Binary Unit Bytes
1 KB 1,000 1 KiB 1,024
1 MB 1,000,000 1 MiB 1,048,576
1 GB 1,000,000,000 1 GiB 1,073,741,824
1 TB 1,000,000,000,000 1 TiB 1,099,511,627,776

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Frequently Asked Questions

Why does my 1TB drive show less than 1TB in Windows?

Manufacturers advertise storage using decimal (1,000-based) TB. Windows reports capacity using binary (1,024-based) TiB, so the same physical drive shows a smaller number, no space is actually missing.

What’s the difference between KB and KiB?

KB (kilobyte) technically means 1,000 bytes; KiB (kibibyte) means 1,024 bytes. In casual use, “KB” is often used to mean either.

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