💾 Data Storage Converter

Convert between bits, bytes, kilobytes, megabytes, gigabytes and terabytes — in both decimal (1 MB = 1,000,000 bytes, used by drive makers) and binary (1 MiB = 1,048,576 bytes, used by operating systems) standards. The two standards are why a "1 TB" drive shows as ~931 GB in Windows.

From

1 bit = 0.125 B

Precision

1 bits = 0.125 bytes

1 × 0.125 = 0.125

1 bit equals 0.125 B, so multiplying by 0.125 converts the value. The result describes the exact same quantity — only the measuring stick changes.

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From the blog

MB vs GB Explained: Why a 1 TB Drive Shows Only 931 GB

1 GB = 1,000 MB by the decimal standard, but Windows counts in binary. The complete guide: the full unit ladder from bit to quettabyte, missing-space tables, Mbps vs MB/s, phone storage and the law.

All data storage units

Unit	Symbol	Definition
Bit	bit	A bit is the smallest unit of digital information — a single 0 or 1. Network speeds (Mbps, Gbps) are measured in bits per second, which is why a 100 Mbps connection downloads at most 12.5 MB/s.
Byte	B	A byte (B) is 8 bits — historically the storage needed for one text character. File sizes and storage capacities are measured in bytes and their multiples.
Kilobyte	KB	A kilobyte (KB) is 1,000 bytes in the SI decimal standard. A short email is a few kilobytes; a typical web page weighs a few hundred.
Megabyte	MB	A megabyte (MB) is 1,000,000 bytes (decimal standard). A smartphone photo is typically 2–5 MB; an MP3 song about 1 MB per minute.
Gigabyte	GB	A gigabyte (GB) is 1,000,000,000 bytes (decimal standard). Storage devices and mobile data plans are sold in gigabytes; an hour of HD streaming uses roughly 3 GB.
Terabyte	TB	A terabyte (TB) is 1,000 gigabytes (decimal standard). Hard drives and cloud storage tiers are commonly 1–4 TB; a 1 TB drive appears as about 931 GiB in Windows.
Kibibyte	KiB	A kibibyte (KiB) is 1,024 bytes — the binary unit operating systems traditionally called a "kilobyte". The Ki prefix (2¹⁰) was standardized in 1998 to end the ambiguity.
Mebibyte	MiB	A mebibyte (MiB) is 1,048,576 bytes (2²⁰). RAM sizes and OS-reported file sizes are effectively mebibytes even when labeled "MB".
Gibibyte	GiB	A gibibyte (GiB) is 1,073,741,824 bytes (2³⁰) — about 7.4% larger than a decimal gigabyte. The gap between GB and GiB explains "missing" drive space.
Tebibyte	TiB	A tebibyte (TiB) is 2⁴⁰ bytes. A "1 TB" drive (decimal) holds only 0.909 TiB, which operating systems may display as ~931 GB.