Unit Converter
Convert length, weight, temperature, area, volume, and speed between commonly used measurement units.
What Is a Unit Converter?
A unit converter changes a measurement from one unit to another while preserving the same physical quantity. It is useful when working with metric and imperial measurement systems.
Available Conversion Categories
- Length: meters, kilometers, centimeters, millimeters, miles, yards, feet, and inches.
- Weight and mass: kilograms, grams, milligrams, metric tonnes, pounds, and ounces.
- Temperature: Celsius, Fahrenheit, and Kelvin.
- Area: square meters, square kilometers, square centimeters, square feet, square yards, acres, and hectares.
- Volume: liters, milliliters, cubic meters, US gallons, quarts, pints, cups, and fluid ounces.
- Speed: meters per second, kilometers per hour, miles per hour, feet per second, and knots.
How to Use This Unit Converter
- Select a conversion category.
- Enter the number you want to convert.
- Select the original unit and the target unit.
- Click Convert to display the result.
Common Unit Conversion Examples
- 1 kilometer = 1,000 meters.
- 1 inch = 2.54 centimeters.
- 1 kilogram is approximately 2.20462 pounds.
- 0 degrees Celsius = 32 degrees Fahrenheit.
- 1 US gallon is approximately 3.78541 liters.
- 100 kilometers per hour is approximately 62.1371 miles per hour.
Metric and Imperial Units
The metric system uses units such as meters, kilograms, and liters. Imperial and US customary measurements include units such as feet, pounds, miles, and gallons. Note that US and imperial gallons are different sizes; this converter uses US customary gallons for its volume conversions.
How Accurate Are the Results?
The converter uses standard conversion factors and temperature formulas. Results are displayed with up to eight decimal places when appropriate, with additional digits shown in scientific notation for very large or very small values. Display rounding does not change the underlying calculation.
Unit Converter FAQs
How do I convert kilograms to pounds?
Select Weight and Mass, enter the kilogram value, choose Kilogram as the original unit and Pound as the target unit, then click Convert.
Can I convert Celsius to Fahrenheit?
Yes. Choose Temperature, enter the Celsius value, and select Fahrenheit as the target unit.
Can temperature values be negative?
Celsius and Fahrenheit values may be negative. Kelvin values below absolute zero are not valid and will be rejected.
Can I convert between metric and imperial units?
Yes. For example, you can convert kilometers to miles, centimeters to inches, kilograms to pounds, and liters to US gallons.
Is this unit converter free?
Yes. This tool is free to use in a modern web browser and does not require installation.
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