How to use All-in-One Unit Converter
- Choose a category (e.g. Length).
- Pick “from” and “to” units.
- Type a value – the result and a full conversion table update instantly.
Examples
- 1 mile = 1.609344 km
- 100 °F = 37.7778 °C
- 1 GiB = 1,073,741,824 bytes; 1 GB = 1,000,000,000 bytes
Supported formats
| Input | Number |
|---|---|
| Output | Converted values |
| Processing | On your device, in the browser (no upload) |
Limitations to know
- US and imperial units with the same name differ (a US gallon is 3.785 L, an imperial gallon is 4.546 L) – both are listed separately.
- Results are shown to up to 10 significant digits; extremely large or small values switch to scientific notation (e.g. 1.5e-12).
Privacy: All-in-One Unit Converter runs entirely in your web browser. Your Number data is not uploaded, stored or shared, and nothing about its contents is sent to analytics.
Frequently asked questions
How accurate are the conversions?
Conversion factors use exact international definitions wherever they exist – for example 1 inch = 2.54 cm and 1 pound = 0.45359237 kg exactly.
Is there a converter just for one type of unit?
Yes. Every category also has its own dedicated converter page with reference tables and examples, such as the Length Converter or Temperature Converter.
References
- NIST SP 811 – Guide for the Use of the International System of Units (SI)
- BIPM – The International System of Units (SI Brochure, 9th edition)
Last updated · Maintained by the ZippyToolkit team