Unit Converter
Convert units of length, weight, area, volume, temperature, and speed easily. Supports meters, kilograms, Fahrenheit, and many more.
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How to Use
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- 1
Select a category
Choose from length, weight, area, volume, temperature, or speed.
- 2
Enter value and unit
Enter the number to convert and select the source unit from the dropdown.
- 3
Check the results
Conversion results for all units are displayed in real time. Use the copy button to copy values.
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About Unit Converter
Unit Converter instantly converts values across six measurement categories: length (meters, feet, inches, miles, kilometers), weight (kilograms, pounds, ounces, grams), area (square meters, acres, hectares, tsubo), volume (liters, gallons, cups, milliliters), temperature (Celsius, Fahrenheit, Kelvin), and speed (km/h, mph, m/s, knots). Enter a value and select a source unit to see all conversion results update in real time. It supports both metric and imperial systems with over 100 unit pairs, making it useful for cooking, travel, engineering, science, and everyday calculations. Negative values are supported for temperature conversions. All processing runs locally in your browser.
Key Features
- Supports 6 categories: length, weight, area, volume, temperature, and speed
- Real-time conversion results for all units as you type
- Free selection of source unit for each category
- Easy one-click copy of conversion results
Use Cases
- Converting miles to kilometers (or km to miles) for road trips and navigation
- Converting Fahrenheit to Celsius when reading international weather forecasts
- Converting pounds and ounces to kilograms for recipes, luggage limits, or shipping
- Converting cups, tablespoons, and fluid ounces when scaling cooking and baking recipes
- Converting square feet to square meters when comparing property listings
- Converting MPH to km/h when driving abroad or reading international speed limits
Frequently Asked Questions
What units are supported?
We support 6 categories: length (mm, cm, m, km, inch, foot, yard, mile), weight (mg, g, kg, ounce, pound), area (m², km², acre, square foot), volume (mL, L, teaspoon, tablespoon, fluid ounce, cup, pint, quart, gallon), temperature (Celsius, Fahrenheit, Kelvin), and speed (m/s, km/h, mph, knot).
How do I convert Fahrenheit to Celsius?
Select the Temperature category, enter your Fahrenheit value, choose Fahrenheit as the source unit, and the Celsius result will appear instantly. For example, 98.6°F converts to exactly 37°C.
How precise are the conversion results?
Results are displayed with up to 6 significant digits. Very large or small values are shown in scientific notation. When copying, values are converted to standard decimal notation.
Can I convert negative temperatures?
Yes, negative temperature values are supported. However, values below absolute zero (0 Kelvin = -273.15°C = -459.67°F) will show an error, as such temperatures cannot physically exist.