Unit Converter – Fast, Free Online Conversions
Need to convert a measurement quickly? Easy Unit Convert provides free online unit converters for length, weight, volume, temperature, area and other everyday measurements.
Choose a converter below, enter your value, and get the result instantly. Our individual converter pages also include formulas, conversion tables and practical examples when you need more than just the final number.
No registration. No app required. Just choose the units you want to convert.
Find a Converter
Search for a conversion such as kg to lbs, inches to cm, km to miles, mL to cups, or Celsius to Fahrenheit.
Unit Converter Categories
Choose the type of measurement you want to convert.
Length Converters
Convert common distance and length units including millimeters, centimeters, inches, feet, meters, kilometers and miles.
Popular tools include:
Weight and Mass Converters
Quickly convert kilograms, pounds, grams, ounces and stones for everyday, fitness, travel and international measurements.
Popular tools include:
Volume Converters
Convert liters, milliliters, gallons, cups, fluid ounces, pints, quarts, tablespoons and teaspoons for cooking, recipes and everyday measurements.
Popular tools include:
Temperature Converters
Convert temperatures between Celsius, Fahrenheit and Kelvin, or use our dedicated tools for cooking, weather and body temperature.
Popular tools include:
Area Converters
Convert square feet, square meters, acres, hectares and other area measurements used for property, land, construction and everyday calculations.
Popular tools include:
Most Popular Unit Conversions
Looking for a common conversion? Start with one of these frequently useful unit converters:
- kg to lbs – convert kilograms to pounds
- lbs to kg – convert pounds to kilograms
- inches to cm – convert inches to centimeters
- mm to inches – convert millimeters to inches
- km to miles – convert kilometers to miles
- miles to km – convert miles to kilometers
- Celsius to Fahrenheit – convert °C to °F
- Fahrenheit to Celsius – convert °F to °C
- mL to cups – convert milliliters to cups
- liters to gallons – convert liters to gallons
- pounds to stone – convert pounds to stones
- square feet to square meters – convert ft² to m²
How to Use Our Online Unit Converters
Using Easy Unit Convert is simple:
- Choose the measurement category you need, such as length, weight, volume, temperature or area.
- Select the conversion direction, for example kilograms to pounds or kilometers to miles.
- Enter your value into the converter.
- View the converted result instantly.
- Check the formula, examples or conversion table if you want to understand the calculation in more detail.
For many conversions, the dedicated page also explains the conversion factor and shows common values so you can verify or reuse the calculation.
Why Accurate Unit Conversion Matters
Different measurements are used in different countries, industries and everyday situations. You may encounter inches instead of centimeters when shopping for a product, miles instead of kilometers while travelling, pounds instead of kilograms when checking weight, or cups instead of milliliters when following a recipe.
A reliable measurement converter helps translate those values into the units you understand and need.
Unit conversion is especially useful for:
- travel and distance;
- cooking and recipes;
- fitness and body weight;
- construction and DIY projects;
- property and land measurements;
- science and education;
- international product specifications.
Conversion Results You Can Understand
Easy Unit Convert is designed to provide more than an unexplained number.
Where useful, our converter pages include:
- the conversion formula;
- the conversion factor;
- step-by-step examples;
- common conversion tables;
- explanations of the units involved;
- practical situations where the conversion is used.
We aim to keep each tool clear, fast and easy to check. Where two measurement systems use similar unit names but different values, the relevant converter explains which definition is being used.
Metric, Imperial and US Customary Units
Unit conversion is often necessary because measurements may be expressed using different systems.
Metric measurements commonly include units such as millimeters, centimeters, meters, kilometers, grams, kilograms, milliliters and liters.
Other everyday measurements include inches, feet, miles, pounds, ounces, stones, cups, pints and gallons.
Instead of remembering every conversion factor, you can use the appropriate unit conversion calculator and check the formula whenever you need it.
Start Converting Units
Choose a category or search for the measurement you need.
Whether you are converting kg to lbs, inches to cm, kilometers to miles, mL to cups, temperatures or area measurements, Easy Unit Convert helps you find the right conversion quickly and understand how the result is calculated.
Frequently Asked Questions
A unit converter is a tool that converts a measurement expressed in one unit into the equivalent value in another unit. For example, it can convert kilograms to pounds, kilometers to miles or inches to centimeters.
Yes. You can use the unit conversion tools on Easy Unit Convert directly in your browser without creating an account or installing an app.
The site currently includes converters for length, weight and mass, volume, temperature and area, with individual tools covering many common metric, Imperial and US customary measurements.
Use the converter search at the top of this page or choose one of the measurement categories. You can also select one of the popular conversions for quick access.
Yes. Many dedicated converter pages include the formula, conversion factor, examples and a conversion table in addition to the calculator.
Yes. The website and converters can be used directly in a modern web browser on desktop, tablet or mobile devices.
