ToolNestr

Unit Converter

Choose a category, pick your units and type a value — the converted result appears instantly. Supports both metric and imperial.

About this unit converter

Whether you’re cooking with a foreign recipe, doing homework, planning a trip or working on a project, converting units quickly is essential. This converter covers length, weight, temperature, speed and volume, switching between metric and imperial in an instant — all in your browser.

How to use it

  1. Choose a category (e.g. Length).
  2. Pick the “from” and “to” units.
  3. Type a value — the result updates instantly.
  4. Use ⇄ to swap the units.

Frequently asked questions

Which units can I convert?

Length, weight/mass, temperature, speed and volume — covering common metric and imperial units like meters, miles, kilograms, pounds, Celsius, Fahrenheit and more.

Does it handle temperature correctly?

Yes. Temperature uses proper formulas (not simple ratios), so Celsius, Fahrenheit and Kelvin convert accurately.

Can I quickly swap the units?

Yes — use the swap button to flip the “from” and “to” units instantly.

Is it private?

Yes, everything runs in your browser.

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