File Size Converter
Convert between bytes, KB, MB, GB, and TB with real-world file analogies
About this calculator
The File Size Converter translates values between bytes, KB, MB, GB, and TB (decimal, base-1000) and their binary counterparts KiB, MiB, GiB, and TiB (base-1024). Enter a value and pick source and target units to see the exact result along with the raw byte count, making the difference between storage-marketing decimal units and operating-system binary units easy to see. Negative values are rejected; real-world size references put results in context.
How to use the File Size Converter tool
- Enter or paste your input into the field.
- Read the output — it updates instantly as you type.
- Adjust the options, if any, to fit your use case.
- Copy the page URL to share the exact result.
Common examples
- 2.5 GB → 2500 MB (2,500,000,000 bytes)
- 1 GiB → 1.073741824 GB — the binary/decimal gap explained
- 750 MB download → ≈0.6985 GiB as your OS reports it
- 4 TB drive → 4000 GB decimal
Frequently asked questions
How does the File Size Converter tool work?
Enter or paste your input and the tool processes it directly in your browser, showing the result immediately. Nothing you type is uploaded to a server — the entire computation happens on your device.
When would I use the File Size Converter tool?
It is handy for development, debugging, design and administration tasks — whenever you need this transformation or check done quickly without installing anything or trusting a third-party service with your data.
How reliable are the results?
The tool implements the relevant standard or specification directly, so its output matches what compliant software produces. Edge cases such as empty or malformed input are reported clearly instead of failing silently.
Can I share a specific result with someone else?
Yes. Your input updates the URL, so copying the address bar and sharing the link reopens the tool in the same state for whoever clicks it.