AnyTool
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How do I convert between bytes, KB, MB, GB, KiB, MiB and GiB?

Type a value into AnyTool Data Storage Converter and pick the units. It instantly converts both ways between bits, bytes, decimal units (KB, MB, GB, TB, PB), binary units (KiB, MiB, GiB, TiB, PiB) and decimal bit-rate units (kilobit, megabit, gigabit), and shows the value in every unit at once in a copyable table. Decimal and binary prefixes are clearly separated so you never confuse a GB with a GiB. Everything is calculated in your browser, so nothing is uploaded.

  • Live two-way conversion — type in either field and the other updates
  • Decimal KB/MB/GB/TB/PB (×1000) kept separate from binary KiB/MiB/GiB/TiB/PiB (×1024)
  • Bits, bytes and network bit-rate units (kbit, Mbit, Gbit) included
  • See the value in every unit at once, each row copyable
  • 100% in your browser — no upload, no signup, works offline

What is

Data Storage Conversion

Data storage conversion changes a quantity of digital information from one unit to another — for example megabytes to gibibytes. The base unit is the byte (8 bits). Decimal (SI) prefixes step by 1000 (1 KB = 1000 bytes), while binary (IEC) prefixes step by 1024 (1 KiB = 1024 bytes), so a gigabyte (GB) and a gibibyte (GiB) are different sizes despite looking similar.

Converters

Related terms

KB vs KiBGB vs GiBdecimal vs binary prefixesbits and bytes

Frequently Asked Questions

A GB is 1,000,000,000 bytes (decimal); a GiB is 1,073,741,824 bytes (binary), about 7.4% larger.

A gigabyte (GB) uses the decimal SI prefix and equals 1000 megabytes, or 1,000,000,000 bytes. A gibibyte (GiB) uses the binary IEC prefix and equals 1024 mebibytes, or 1,073,741,824 bytes — roughly 7.4% larger than a GB. Drive makers and networks use decimal GB; Windows, RAM and many file managers use binary GiB but often still label it "GB", which is the main source of confusion.

The drive is 1 trillion bytes (decimal TB), but the OS reports binary gibibytes: 1e12 ÷ 1024³ ≈ 931 GiB.

Storage manufacturers sell capacity in decimal terabytes, where 1 TB = 1,000,000,000,000 bytes. Operating systems like Windows measure in binary units but display them with decimal labels, so they divide by 1024³ instead of 10⁹: 1,000,000,000,000 ÷ 1,073,741,824 ≈ 931 GiB. The drive is not missing space — the two systems simply count differently.

A decimal kilobyte (KB) is 1000 bytes; a binary kibibyte (KiB) is 1024 bytes.

It depends which standard you mean. The decimal kilobyte (KB) defined by the SI is exactly 1000 bytes. The binary kibibyte (KiB) defined by the IEC is 1024 bytes (2¹⁰). Historically "KB" was loosely used for 1024 bytes, which is why AnyTool labels every unit decimal or binary so the value is never ambiguous.

No. Every calculation runs in your browser, so nothing is sent to a server and it works offline.

AnyTool Data Storage Converter computes every result locally in JavaScript using exact factors through a byte base. No value is uploaded, there is no tracking, and the page keeps working offline after the first load.

Detailed Explanation

Methodology

How the Data Storage Converter Works

AnyTool Data Storage Converter performs every calculation in the browser. Each unit declares a single linear factor relative to a shared byte base — the exact number of bytes in one of that unit — so any unit converts to any other through bytes without an N-by-N table. A bit is 1/8 byte. Decimal (SI) prefixes are powers of 1000: 1 KB = 1000 B, 1 MB = 1e6 B, 1 GB = 1e9 B, 1 TB = 1e12 B, 1 PB = 1e15 B. Binary (IEC) prefixes are powers of 1024: 1 KiB = 1024 B, 1 MiB = 2²⁰ B, 1 GiB = 2³⁰ B, 1 TiB = 2⁴⁰ B, 1 PiB = 2⁵⁰ B. Network bit-rate units are decimal and measured in bits: 1 kbit = 125 B, 1 Mbit = 125,000 B, 1 Gbit = 125,000,000 B. A value is multiplied to bytes and then divided into the target unit.

  • Fifteen units: bits, bytes, decimal KB–PB, binary KiB–PiB and bit-rate kbit/Mbit/Gbit
  • The byte is the shared base; each unit is one exact factor
  • Decimal prefixes step by 1000; binary prefixes step by 1024
  • Editing either field converts both directions live
  • All arithmetic is client-side JavaScript — no server round-trip
How It Works

Decimal vs Binary: Why GB and GiB Differ

The single biggest source of error in storage units is mixing decimal and binary prefixes. A gigabyte (GB) is 1,000,000,000 bytes, but a gibibyte (GiB) is 1,073,741,824 bytes — about 7.4% larger — and the gap widens with size (a TiB is ~10% larger than a TB). This is exactly why a "1 TB" drive shows as roughly 931 GiB in Windows: the hardware is sold in decimal terabytes (1e12 bytes) while the operating system divides by 1024³ and reports binary gibibytes, often still labelled "GB". AnyTool labels every unit explicitly as decimal or binary and shows them side by side so the two systems are never confused.

  • 1 GB = 1e9 bytes (decimal); 1 GiB = 1,073,741,824 bytes (binary)
  • A GiB is ~7.4% larger than a GB; a TiB ~10% larger than a TB
  • A "1 TB" drive shows ~931 GiB because 1e12 ÷ 1024³ ≈ 931
  • Drive makers and networks use decimal; Windows and RAM use binary
  • Network speeds are decimal bits: 100 Mbit/s ≈ 12.5 MB/s
Privacy & Security

Privacy and Offline Use

Because all conversion runs in the browser, no value is sent to a server, there is no account or tracking, and the page works offline after first load. The converter is built on a shared, unit-tested conversion engine that other AnyTool unit converters reuse, so behaviour is consistent across the site.

Data storage conversion: in-browser (AnyTool) vs typical online converters
CapabilityAnyToolTypical online converters
ProcessingRuns in your browserOften server-side
Decimal vs binaryKB/MB/GB and KiB/MiB/GiB clearly labelledOften blurred or only one system
Bit-rate unitskbit, Mbit, Gbit includedFrequently missing
Two-way inputEdit either field, both updateUsually one-direction with a button
All units at onceYes, copyable tableOften one target at a time
Precision controlAdjustable 0-10 decimalsFrequently fixed
Works offlineYes (PWA)No
Cost / signupFree, no signupOften ad-heavy or gated

AnyTool converts every unit locally through a byte base and uploads nothing.