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Data Storage Converter

Available

Convert storage sizes between bits, bytes, decimal units (kB, MB, GB, TB, PB) and binary units (KiB, MiB, GiB, TiB, PiB), with every unit side by side.

Convert a size

Examples:

Decimal vs binary

The same amount of data in both prefix systems. Decimal (SI) steps are ×1000; binary (IEC) steps are ×1024.

In every unit

Related: Bits & Bytes Explainer · Bandwidth Calculator · Unit Converter

How it works

Decimal (SI) prefixes multiply by 1000 per step: kB, MB, GB, TB, PB. Binary (IEC) prefixes multiply by 1024: KiB, MiB, GiB, TiB, PiB. One byte is 8 bits. The converter uses exact fractions, so results such as 1 GiB = 1,073,741,824 bytes are exact.

Common conversions

  • 1 KiB = 1,024 B · 1 MiB = 1,048,576 B · 1 GiB = 1,073,741,824 B
  • 1 TB = 1,000,000,000,000 B ≈ 931.32 GiB ≈ 0.909 TiB
  • 1 byte = 8 bits, so 1 MB = 8 Mbit and 1 GB = 8,000 Mbit

Frequently asked questions

Why does my new 1 TB drive show about 931 GB?

The drive holds 1,000,000,000,000 bytes (decimal terabyte). Many operating systems divide by 1024³ and label the result “GB” although it is really GiB: 10¹² / 1024³ ≈ 931.32 GiB. Nothing is missing.

Is KB 1000 or 1024 bytes?

Strictly, kB (lowercase k) is 1000 bytes and KiB is 1024 bytes. “KB” with a capital K is commonly used for 1024 bytes in older software; this converter treats KB as the decimal kilobyte and offers KiB for 1024.

What about bits?

Bits (b) are used for network speeds and memory chips; bytes (B) for files and storage. 1 B = 8 b, so 1 MB = 8 Mbit.