Unit Converter
Convert between length, weight, and temperature units
What is Unit Converter?
Unit Converter is a free online tool that converts between common units of length, weight, and temperature. It supports metric and imperial units including meters, feet, inches, kilometers, miles, kilograms, pounds, ounces, Celsius, Fahrenheit, and Kelvin. Simply enter a value, select the source and target units, and get instant results. The converter handles decimal precision accurately and displays conversions in real time as you type. All calculations happen in your browser with no data sent to any server. Whether you are cooking with international recipes, working on engineering projects, or traveling between countries with different measurement systems, Unit Converter provides quick and accurate conversions.
How to Use
- Select a category (Length, Weight, Temperature).
- Enter a value and select the units to convert between.
- Results are displayed in real time.
Tips & Best Practices
- Use the swap button to quickly reverse the conversion direction.
- For cooking conversions, remember that 1 cup is approximately 236.6 ml and 1 oz is about 28.35 grams.
- When converting temperatures, note that Celsius and Fahrenheit meet at -40 degrees.
- Bookmark this tool for quick access when working with international specifications.
- For scientific work, use Kelvin for temperature to avoid negative values in calculations.
Use Cases
Cooking
Convert between metric and imperial units for international recipes (grams to ounces, ml to cups).
Travel
Convert between kilometers and miles, Celsius and Fahrenheit when visiting different countries.
Engineering
Convert between metric and imperial measurements for construction and manufacturing specifications.
Fitness
Convert between kilograms and pounds for weight tracking and exercise planning.
FAQ
What units can I convert?
You can convert Length (mm, cm, m, km, in, ft, yd, mi), Weight (mg, g, kg, lb, oz), and Temperature (°C, °F, K).
How is temperature conversion calculated?
Standard conversion formulas between Celsius, Fahrenheit, and Kelvin are used. Example: °F = °C × 9/5 + 32
How does unit conversion work?
All units are first converted to a base unit (meters for length, kilograms for weight), then converted to the target unit in a two-step process.
Is my data sent to any server?
No, all conversion calculations are performed locally in your browser and no data is transmitted externally.
How many decimal places are displayed?
Results are displayed to a meaningful number of decimal places, and very small or large values may appear in scientific notation.
What is the difference between imperial and metric systems?
The metric system is a decimal-based international standard (mm, cm, m, km), while the imperial system (in, ft, yd, mi) is used in some countries like the US.
How accurate are the conversions?
Conversions use standard mathematical formulas with high decimal precision for accurate results.
What unit categories are supported?
Currently length (meters, feet, inches, km, miles), weight (kg, lb, oz, g), and temperature (C, F, K) are supported.
Is my data collected?
No, all calculations happen in your browser. No data is sent to any server.
How do I convert Celsius to Fahrenheit?
The formula is F = (C x 9/5) + 32. Select Celsius as source and Fahrenheit as target for automatic conversion.
Can I convert between metric and imperial?
Yes, the tool supports cross-system conversions like meters to feet, kilograms to pounds, etc.
Are the results rounded?
Results are displayed with appropriate decimal precision. Very small or very large numbers use scientific notation.
Does it support volume units?
Currently the tool focuses on length, weight, and temperature. Volume conversions may be added in the future.
What is the difference between mass and weight?
Mass (kg) measures the amount of matter. Weight (N) measures gravitational force. In everyday use, kg and lb are used interchangeably for both.