What units can I convert?

You can convert length, temperature, area, volume, weight and time using metric and imperial units.

Is the unit converter free to use?

Yes, ToolsToday unit converter is free with no registration and no watermark.

Does the conversion happen instantly?

Yes. Results update instantly when you type or change units.

Unit Converter — Length, Weight, Temperature, Volume, Area

From value

Converted value

From unit

To unit

Results update automatically when you type or change units. Select units from the lists to convert instantly.

Free Online Unit Converter

ToolsToday unit converter helps you convert common measurements quickly and accurately. Convert between metric and imperial units for daily life, education, engineering, development, construction, travel and science. This tool supports popular conversions like meters to feet, kilometers to miles, kilograms to pounds, liters to gallons, Celsius to Fahrenheit and many more.

What you can convert

Length — meters, kilometers, centimeters, millimeters, miles, yards, feet, inches
Temperature — Celsius, Fahrenheit, Kelvin
Area — square meters, square kilometers, square feet, square inches, acres, square miles
Volume — liters, milliliters, cubic meters, cubic feet, gallons
Weight — kilograms, grams, milligrams, metric tons, pounds, ounces
Time — milliseconds, seconds, minutes, hours, days

Who is this tool for

This unit converter is useful for students and teachers, engineers and builders, developers working with data, travelers who need quick conversions, and anyone who wants simple, readable results without installing apps. Conversions are calculated instantly in your browser for convenience.

Accuracy notes

The converter uses standard conversion factors for metric and imperial units. Temperature is calculated with correct formulas (Celsius, Fahrenheit and Kelvin). For scientific precision, always verify requirements for your specific task, but for everyday and professional use these conversions match common standards.