Just Tool It /
Unit Converter
On-device — nothing uploaded
Unit Converter
Length, mass, temperature, data and more — all in one place. Type either side; conversions are instant.
Why use an on-device unit converter?
Unit conversion is simple math — it should not require an account, ad maze, or telemetry-heavy app. Just Tool It runs conversions locally so engineers, students, and travelers get instant answers without shipping every query to an analytics backend.
How to convert units
- Pick a quantity category (length, mass, temperature, etc.).
- Enter a value and choose source/target units.
- Read the converted result instantly.
- Copy the number into your notes or code.
Frequently asked questions
How precise are the conversions?
Conversions use standard factors suitable for everyday engineering and school work. For legal metrology,
follow your jurisdiction’s certified references.
Does it work offline?
Yes after the page is cached — pure client-side math.
Temperature quirks?
Celsius/Fahrenheit/Kelvin use affine formulas, not pure scaling. The tool applies the correct transform.
Data units: SI or binary?
Check labels for MB vs MiB style units if both appear — storage vendors and OS UIs disagree historically.