What’s the difference between decimal and binary units?

Decimal uses powers of 1000 (1 KB = 1000 bytes). Binary uses powers of 1024 (1 KiB = 1024 bytes). Storage marketing often uses decimal, while operating systems may show binary-equivalent sizes.

Is KB the same as KiB?

Strictly, no. KB is decimal (1000). KiB is binary (1024). Some software labels KiB values as KB, which can be confusing.

Which should I choose for files on my computer?

If you want to match many OS file size displays, try the binary option (KiB/MiB/GiB). If you want to match disk/ISP marketing (e.g., 1 TB drive), use decimal.

Are my inputs stored?

No. This converter runs locally in your browser.

Bytes Converter

Convert bytes to KB/MB/GB/TB (and back). Choose decimal (1000-based) or binary (1024-based) units to match your use case.

Value

Enter a value, select input unit + standard, then convert. Negative values are not allowed.

From

Standard

Auto uses 1000 for KB/MB/GB/TB and 1024 for KiB/MiB/GiB/TiB.

Rounding

Result will appear here.

Unit	Value

Privacy: runs locally in your browser. No inputs are stored or transmitted.

How it works

Conversions work by converting the input to bytes first, then converting bytes to the target unit.
Decimal: KB = 1000 B, MB = 1000² B, ...
Binary: KiB = 1024 B, MiB = 1024² B, ...

Examples

1,048,576 B → 1 MiB (binary)
1,000,000 B → 1 MB (decimal)
2 GB → 2,000,000,000 B (decimal)

When to use this tool

This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.

When to use

Quick checks or one-time calculations
Validating or converting data before using it elsewhere
Simple tasks that do not require advanced software

When not to use

Critical financial, legal, or medical decisions
Large-scale or automated processing
Situations requiring guaranteed precision beyond basic validation

Always review results before using them in important contexts.

About this tool

This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.

You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.

FAQ

What’s the difference between decimal and binary units?
Decimal uses powers of 1000 (1 KB = 1000 bytes). Binary uses powers of 1024 (1 KiB = 1024 bytes). Storage marketing often uses decimal, while operating systems may show binary-equivalent sizes.
Is KB the same as KiB?
Strictly, no. KB is decimal (1000). KiB is binary (1024). Some software labels KiB values as KB, which can be confusing.
Which should I choose for files on my computer?
If you want to match many OS file size displays, try the binary option (KiB/MiB/GiB). If you want to match disk/ISP marketing (e.g., 1 TB drive), use decimal.
Are my inputs stored?
No. This converter runs locally in your browser.