Data Storage Converter

Convert between bytes, kilobytes, megabytes, gigabytes, and terabytes, in either decimal (1000-based) or binary (1024-based) units. See all unit conversions at once.

Unit System

Value

Unit

1,000,000

1,000

0.001

0.000001

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Why use Data Storage Converter?

Data storage can be measured in decimal units (1000-based, as used on product packaging) or binary units (1024-based, as used by most operating systems) — the same nominal size means a different actual byte count depending on which system is used. This tool converts a value into every common unit at once, in whichever system you choose.

Key benefits

Both decimal and binary unit systems supported
Shows every unit conversion simultaneously
No signup required

Features

Decimal (KB/MB/GB/TB) and binary (KiB/MiB/GiB/TiB) modes
Instant multi-unit output

Popular use cases

Understanding why a "1TB" drive shows less space in your OS
Converting a file size for a storage or bandwidth calculation
Comparing storage plans listed in different units

How to use Data Storage Converter

1
Choose a unit system
Select Decimal (1000-based, used by storage manufacturers) or Binary (1024-based, used by operating systems).
2
Enter a value and unit
Type a number and pick its starting unit.
3
Read all conversions
See the equivalent value in every other unit at once.

Frequently asked questions

Why do decimal and binary units give different results?

Decimal units (used by drive manufacturers) use 1000 as the base, while binary units (used by most operating systems) use 1024 — this is why a "1TB" drive shows as roughly 931 GiB in your OS.

Which should I use?

Use decimal units when working with manufacturer specs or network bandwidth, and binary units when working with how an operating system reports file and disk sizes.

Last reviewed: July 2026

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