What's the difference between KB and KiB?

KB (decimal) is 1000 bytes; KiB (binary) is 1024 bytes. Toggle the switch to choose.

Which convention do operating systems use?

It varies — Windows often shows binary values labeled as KB/MB, while storage manufacturers use decimal.

Can I convert fractional values?

Yes, decimal input values like 1.5 are supported.

Data Size Converter

Convert bytes, KB/MB/GB/TB with binary (KiB/MiB) or decimal units.

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Value

Unit

Binary (1 KB = 1024 B) instead of decimal (1000 B)

Input

1 MB converted using decimal (base 1000) units.

Converted

Unit	Value
B	1,000,000
KB	1,000
MB	1
GB	0.001
TB	0.000001
PB	0

About the Data Size Converter

Convert digital storage sizes between bytes, kilobytes, megabytes, gigabytes, and terabytes, choosing between binary (1024-based, KiB/MiB) and decimal (1000-based) conventions.

Examples

1 GB in bytes

1 GB

Output

1,000,000,000 B

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser