Unit Converter

Free tool

About the unit converter

This is a free unit converter. Convert length, weight, and temperature in your browser. Type a value, pick the two units, and the result reads out right away. Everything runs in your browser, with no account and nothing to install.

Choose a category

Switch to length for distances like meters, kilometers, miles, and feet; to weight for kilograms, grams, pounds, and ounces; and to temperature for Celsius, Fahrenheit, and Kelvin. Each category carries its own unit list, so you only see the choices that make sense in that moment.

Instant result

As soon as you type a value or change a dropdown, the result recalculates. There is no separate button to press; you can nudge the number as you work and watch the conversion change in real time.

Swap in one tap

When you need to reverse the two units, the swap button trades the from and to. That is quick in cases like looking from kilometers to miles and then converting miles into kilometers, without retyping anything.

Accurate and readable

Conversions use standard factors, so they are exact for length and weight and correctly formulated for temperature. The result is rounded on screen to sensible places but keeps enough precision for everyday work, recipes, travel, or homework.

Private by default

Each calculation happens on your device and is never sent anywhere. Nothing is uploaded, logged, or saved, so the values you enter are yours alone. Close the tab and it is gone — there is no history and no server copy.

Copy the result

When the result is ready, the copy button puts the whole readable form on your clipboard. Paste it straight into a message, a sheet, or your homework, with no need to retype it each time.

Common conversions

The everyday ones are here: kilometers to miles for distance, kilograms to pounds for weight, and Celsius to Fahrenheit for temperature, each with the reverse a tap away. Smaller units like centimeters, grams, and millimeters sit in the same lists for fine measurements, while tonnes, miles, and Kelvin cover the larger or more technical end. Whatever direction you need, type into either side and the other follows.

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