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Unit Converter

100% free — instantly convert length, weight, temperature, volume, area, speed, time and data units. Accurate two-way conversion that runs entirely in your browser.

Enter a value to convert.
Three simple steps

How to convert units online

No downloads, no accounts. Convert between any two units in seconds.

  1. 1

    Choose a category

    Pick what you want to convert — length, weight, temperature, volume, area, speed, time or data.

  2. 2

    Enter a value & units

    Type a number and select the units you're converting from and to. Both fields are editable.

  3. 3

    Read the result

    The converted value updates instantly as you type, and works in both directions.

Everything you need

A unit converter for everyday and professional use

Fast, accurate and private — metric and imperial conversions that just work.

8 categories

Length, weight, temperature, volume, area, speed, time and digital data — all in one place.

Two-way conversion

Edit either field and the other updates automatically. Swap units with a single click.

Accurate factors

Precise, internationally recognized conversion factors for reliable results every time.

Instant results

Conversions happen the moment you type — no buttons to press, no waiting.

100% private

Everything runs locally in your browser. Nothing you type is ever uploaded.

Free & unlimited

Completely free forever — no sign-up, no watermarks, no limits.

Convert any measurement in seconds

Whether you're following a recipe, planning a trip, doing homework, or working on a technical project, this free unit converter makes switching between measurement systems effortless. Convert centimeters to inches, kilograms to pounds, Celsius to Fahrenheit, liters to gallons and much more — all without leaving your browser.

The converter supports both metric and imperial units across eight categories: length, weight and mass, temperature, volume, area, speed, time and digital data. Type a value into either field and the result appears instantly, so you can convert in either direction and double-check your numbers with the quick-conversion list.

Because everything runs on your device, there's nothing to install and nothing is uploaded. Your inputs stay completely private, and the tool works even when you're offline. This is one of many free browser tools on Uzetool — explore more tools as we add them.

Questions

Frequently asked questions

How do I convert units with this tool?

Pick a category such as length or weight, type a number into either field, and choose the units you're converting from and to. The result updates instantly and works in both directions.

Is the unit converter free?

Yes — it's 100% free with no sign-up, watermarks, or usage limits. The tool is supported by unobtrusive ads so it can stay completely free to use.

What units can I convert?

You can convert length, weight and mass, temperature, volume, area, speed, time and digital data units, including both metric and imperial measurements.

Are the conversions accurate?

Yes. The tool uses precise, internationally recognized conversion factors, so results are accurate for everyday, academic and professional use.

Does the converter work offline?

Once the page has loaded, all conversions happen locally in your browser, so nothing is sent to a server and the tool keeps working even without a connection.