How File Size Converter Works
File sizes here use the binary convention built into operating systems and file managers: 1 KB = 1,024 bytes, 1 MB = 1,024 KB, and so on — each unit is exactly 1,024 times the one before it.
How to Use This Tool
- Enter a value and choose its unit.
- All five common file-size units update instantly below.
Example
A 25 MB email attachment limit equals 25,600 KB, or about 0.0244 GB — useful for checking whether a file will fit before you try to send it.
Helpful Tips
- Some storage providers and hard drive manufacturers use 1,000-based (decimal) units instead of 1,024-based (binary) ones, which is why a "1 TB" drive often shows as roughly 931 GB in your operating system — this tool uses the binary convention your OS displays.
- For very large or very small numbers, the result may show extra decimal places to avoid rounding to zero.
Frequently Asked Questions
Why does 1 GB not equal exactly 1,000 MB here?
This tool uses the binary (1,024-based) convention that operating systems and file managers use, matching what you'd see in a file's properties panel.
Is this the same as the Data Storage Converter?
It covers the same five everyday units in one quick view, while the Data Storage Converter supports the same binary convention plus bits, for more technical use cases.
Is my data uploaded anywhere?
No, the conversion is simple arithmetic done entirely in your browser.
This tool runs entirely in your browser. Your input is not uploaded to any server.