Data Storage Converter
Convert between bits, bytes, and both decimal (KB, MB, GB) and binary (KiB, MiB, GiB) storage units instantly, with both systems shown side by side.
🔒 Processed locally in your browser
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How to use
- Enter a numeric value in the Value field.
- Choose the unit it's currently in from the From unit dropdown — grouped into Bit/Byte, Decimal (SI) and Binary (IEC).
- See it instantly converted into every other unit, side by side in the Decimal and Binary tables.
- The unit you started from is highlighted in bold in both tables so you can compare it directly.
Features
- Converts between bits, bytes, and both decimal (KB–PB) and binary (KiB–PiB) storage units at once
- Clearly separates the decimal (base 1000) and binary (base 1024) unit families
- Updates live as you type — no button to press
- Uses exact byte-based math, not rounded approximations
- 100% client-side — your numbers never leave your browser
Frequently asked questions
Why do GB and GiB show different values for the same amount of data?
GB (gigabyte) is a decimal/SI unit equal to 1000^3 = 1,000,000,000 bytes, while GiB (gibibyte) is a binary/IEC unit equal to 1024^3 = 1,073,741,824 bytes. They're about 7.4% apart. A drive labeled "500GB" by its manufacturer therefore shows up as roughly 465GiB in an operating system that reports capacity in binary units — the drive isn't smaller, the units are just different.
Which unit does my computer actually use?
It depends on the context and OS. Storage manufacturers (and network speeds) almost always use decimal units (KB, MB, GB). Windows File Explorer traditionally labels binary (1024-based) sizes with decimal names like "GB", which is where most of the confusion comes from — macOS and Linux more often use true binary labels (KiB, MiB, GiB) or true decimal ones.
How many bits are in a byte?
8 bits make 1 byte. Network speeds are usually quoted in bits per second (e.g. Mbps), while file sizes are usually quoted in bytes (e.g. MB) — another common source of mix-ups, so remember to divide by 8 to go from bits to bytes.
How precise are the conversions?
Conversions use exact multiplication or division by each unit's byte size (e.g. 1 KiB = 1024 bytes exactly), formatted to up to 10 significant digits for your locale. There's no cumulative rounding error from chaining conversions.
Does this tool store or upload my data?
No. All calculations happen locally in your browser. The value you enter is never sent to a server or saved anywhere.