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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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.
How does Data Size Converter work?
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
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
Enter a value
Type the size and select the source unit.
Choose prefix mode
Select binary (1024) or decimal (1000) prefixes.
View all conversions
The tool shows the equivalent in all units.
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.