Toolbox101 All tools

Converters

Convert between bytes, KB, MB, GB and KiB, MiB, GiB

Byte converter takes a size, the unit it is in, and shows it in every unit at once: bits and bytes, the decimal units KB, MB, GB, TB and PB (powers of 1000), and the binary units KiB, MiB, GiB, TiB and PiB (powers of 1024). Developers use it to size log volumes, upload limits and storage tiers from exact figures. Choose the starting unit in "From" (bytes by default) and type the value; a 1048576-byte file reads 1.048576 MB and exactly 1 MiB.

Open Byte Converter in the app Browse all tools

How to use Byte Converter

  1. Open Byte Converter in the Toolbox101 app.
  2. Pick the unit your number is in with From (bytes by default).
  3. Type the size into the Value box, for example 1048576.
  4. Read every unit in the Output box, decimal and binary side by side.
  5. Click Copy to keep the converted sizes for your storage plan or quota note.

Worked example

Byte Converter returns the output below for this input.

Input

1048576

Output

Bits: 8388608 bit
Bytes: 1048576 B
Kilobytes: 1048.576 KB
Megabytes: 1.048576 MB
Gigabytes: 0.001048576 GB
Terabytes: 0.000001048576 TB
Petabytes: 1.048576e-9 PB
Kibibytes: 1024 KiB
Mebibytes: 1 MiB
Gibibytes: 0.0009765625 GiB
Tebibytes: 9.536743164e-7 TiB
Pebibytes: 9.313225746e-10 PiB

Check it yourself: open Byte Converter and enter the same input.

Frequently asked questions

Does 1 KB mean 1000 bytes or 1024 bytes?

Here both are available and kept apart: KB, MB and GB are the SI units (1000, 1000^2, 1000^3 bytes) and KiB, MiB and GiB are the binary ones (1024, 1024^2, 1024^3). A drive sold as 1 TB is 1,000,000,000,000 bytes, which the output shows as about 931.3 GiB. That gap is why a new drive looks smaller in an operating system that counts in binary units.

How do I convert KB or MB back into bytes?

Set From to the unit you have and type the number; the bytes line is in the output. 512 KiB gives 524288 B, and 2 MB gives 2000000 B.

Why do some rows show an exponent?

Every unit is listed, so a small file appears as a tiny fraction of a petabyte. Numbers are shown with up to ten significant digits, and very small ones switch to exponent notation such as 1e-9.

How large a value can it handle?

Values are ordinary JavaScript numbers, exact for whole numbers up to 2^53 (about 9 petabytes) and approximate, to ten digits, beyond that. That is far past typical file and quota figures.

Use Byte Converter now

Open Byte Converter in the app

Runs in your browser. Nothing you type is uploaded.