Free Unit Converter
Convert length, weight, temperature, volume, and data size units instantly in your browser.
Enter a value to convert.
Your numbers stay in your browser.
How to convert units
- Choose a category: length, weight, temperature, volume, or data size.
- Pick the units you're converting from and to.
- Type a value — the result updates instantly.
Why use this private unit converter?
Everything runs locally in your browser with standard, verifiable conversion factors, so you can double-check the math by hand if needed.
A note on data size units
This converter uses the binary convention (1 GB = 1024 MB), the traditional desktop-computing definition. Some contexts use 1 GB = 1000 MB instead — check which your source expects for very large numbers.
Common use cases
- Convert a recipe's measurements between metric and imperial
- Check a temperature reading in the other scale
- Convert a file size between megabytes and gigabytes
Frequently asked questions
Is this unit converter free?
Yes, with no account, no signup, and no watermark.
Are my numbers uploaded anywhere?
No. All conversions run locally in your browser.
Which categories are supported?
Length, weight, temperature, volume, and data size (MB/GB).
Is MB to GB exactly 1000 or 1024?
This tool uses 1024 (the binary convention). See the note above if your source uses the 1000 convention instead.
Can I swap the from/to units quickly?
Yes. Use the swap button to flip the units instantly.