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Convert length, weight, and temperature
Switch between meters, kilometers, centimeters, millimeters, miles, feet, and inches. Convert kilograms, grams, pounds, and ounces. Temperature conversions include Celsius, Fahrenheit, and Kelvin.
FREE ONLINE CALCULATOR
Unit Converter
Convert everyday measurements without hunting for a formula. Choose length, weight, or temperature, enter a value, and get a clear answer instantly.
Open the unit converterNo account needed. Your calculation stays in your browser.
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How to use the converter
Choose a measurement type, enter the number you want to convert, and select the starting and target units. The converter applies the standard conversion formula and displays a rounded result.
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Conversions stay in your browser
Unit conversions are calculated on your device. The value you enter is not sent to a server.
COMMON QUESTIONS
About the unit converter
Which units can I convert?
The converter supports common metric and US customary units for length and weight, plus Celsius, Fahrenheit, and Kelvin for temperature.
How are temperature conversions handled?
The standard formulas are used for Celsius, Fahrenheit, and Kelvin. Values below absolute zero are rejected.
How precise are the results?
Results are displayed with up to 8 significant digits to keep useful precision without excessive decimals.