Data Size Converter

Data Size Converter

Decode digital storage mysteries with precision conversions between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Essential for IT professionals, content creators, and anyone managing file sizes, storage capacity, and bandwidth calculations across metric and binary systems.

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Quick Presets
Common storage sizes for quick reference
Input
Convert between data storage units like bytes, kilobytes, megabytes, gigabytes, and terabytes.
How it works: Converts data sizes using the binary system (1024-based) which is the standard for computer storage calculations.

Complete Guide: Data Size Converter

Everything you need to know about using this tool effectively

What is Data Size Converter?

The Data Size Converter transforms digital storage sizes between bytes, KB, MB, GB, TB, and PB. It supports both binary (base-1024, used by Windows) and decimal (base-1000, used by storage manufacturers) prefix modes. You enter a value in one unit and see the equivalent in all others. All processing happens in the browser.

This tool converts between digital storage units using either 1024 (binary/IEC) or 1000 (decimal/SI) as the multiplier between each prefix. Binary mode reflects how operating systems report file sizes. Decimal mode reflects how hard drive manufacturers label capacity.

Key Features
Converts bytes, KB, MB, GB, TB, PB
Binary (1024) and decimal (1000) modes
Real-time conversion as you type
Shows all units at once
Copy any value to clipboard
Handles very large numbers
Runs in the browser with no uploads
Quick preset values
Common Use Cases
When and why you might need this tool

Understanding file sizes

Convert a file size from bytes to megabytes to understand how large it is.

Comparing storage capacity

Convert a 500 GB drive to bytes to compare with a file size reported in bytes.

Calculating download sizes

Convert a download size from gigabytes to megabytes to track progress.

Planning storage needs

Convert total data from megabytes to terabytes to determine how much storage to purchase.

How to Use This Tool
Step-by-step guide to get the best results
1

Enter a value

Type the size and select the source unit.

2

Choose prefix mode

Select binary (1024) or decimal (1000) prefixes.

3

View all conversions

The tool shows the equivalent in all units.

4

Copy a value

Copy the unit you need.

Pro Tips
1

Binary (1024) mode matches how Windows reports file sizes.

2

Decimal (1000) mode matches how storage manufacturers label drives.

3

A 1 TB drive is about 931 GiB in binary mode, which is why a 1 TB drive shows as ~931 GB in Windows.

4

1 GB = 1,000,000,000 bytes (decimal) or 1,073,741,824 bytes (binary).

Frequently Asked Questions
What is the difference between binary and decimal prefixes?

Binary mode uses 1024 as the multiplier (1 KB = 1024 bytes). Decimal mode uses 1000 (1 KB = 1000 bytes). Operating systems typically use binary, while hardware manufacturers use decimal.

Why does my 1 TB drive show as ~931 GB?

The drive is labeled in decimal (1 TB = 1,000,000,000,000 bytes). Windows reports in binary, where that number equals about 931 GiB.

Is my data sent to a server?

No. All conversion happens in your browser. Nothing is transmitted.

What units are supported?

Bytes, KB, MB, GB, TB, and PB.

Can I convert very large values?

Yes. The tool handles values up to JavaScript's maximum safe integer.