Justools

Unit Converter

Convert everyday length, weight, and temperature units without hunting for a formula.

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Free tools that often go together. Everything runs in your browser.

How to use this tool

  1. Choose Length, Weight, or Temperature.
  2. Enter a value and select From and To units.
  3. Read the converted result.

Frequently asked questions

What is a unit converter?

A unit converter changes a measurement from one unit into another, such as turning kilometres into miles, kilograms into pounds, or Celsius into Fahrenheit. This tool covers everyday length, weight, and temperature conversions that come up when reading a recipe from another country, checking a shipping weight, following a workout plan measured in different units, or understanding a weather forecast given in an unfamiliar scale. Instead of remembering conversion factors or searching for a formula, you enter a value, pick the units, and see the converted result immediately. It is built for quick, everyday conversions rather than specialist scientific or engineering units, so it suits cooking, travel, fitness, DIY projects, and schoolwork.

Who uses a unit converter?

Travellers use a unit converter to understand distances, luggage weight limits, and local temperatures when visiting a country that uses different units than they are used to. Cooks and bakers use it to convert recipe measurements between metric and imperial when following international recipes. Students use it for science and maths homework that mixes unit systems. Fitness enthusiasts use it to convert body weight, running distances, or gym plates between kilograms and pounds. DIY and trade workers use it for quick length conversions between metric and imperial when measuring materials. Anyone who deals with mixed units day to day, for travel, cooking, study, or a home project, can use this to avoid manual conversion math.

What can I convert with this tool?

You can convert everyday length units such as metres, feet, and inches, weight units such as kilograms and pounds, and temperature between Celsius, Fahrenheit, and Kelvin. Typical uses include converting a recipe's grams to ounces, checking a parcel's weight in the unit your carrier requires, converting your height or a room's dimensions between metric and imperial, or reading a weather report given in a scale you are less familiar with. The tool focuses on the units people need most often in daily life rather than covering every specialist or scientific unit.

Is conversion private?

Yes. Unit conversion is a local calculation in your browser.

How accurate are the conversions?

Length and weight use standard conversion factors. Results are rounded for display.

How does temperature conversion work?

Celsius, Fahrenheit, and Kelvin use their standard formulas, including offsets where needed.

Can I use this for engineering specs?

Use it for everyday checks. For regulated or high-precision engineering work, verify with your required standard.

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