Unit Converter
Convert between units of length, weight, temperature, and more.
How to Use Unit Converter
- 1
Select a unit category
Choose from length, weight/mass, temperature, volume, or speed to see the available units for that category.
- 2
Choose your units
Select the unit you are converting from and the unit you want to convert to using the dropdown menus.
- 3
Enter a value
Type the number you want to convert. The result updates instantly as you type.
- 4
Read the result
The converted value is displayed immediately. You can also type in the output field to convert in the reverse direction.
Key Features
Five Unit Categories
Convert between units of length, weight/mass, temperature, volume, and speed — covering everyday and professional needs.
Bidirectional Conversion
Type in either field to convert in both directions — no need to swap units manually.
Instant Results
Conversions happen in real time as you type, so you can quickly experiment with different values.
Common Unit Presets
All commonly used units are included for each category, from metric to imperial and beyond.
High Precision
Results are calculated with full floating-point precision and displayed with appropriate decimal places.
Common Use Cases
Cooking & Recipes
Convert between cups, milliliters, ounces, and grams when following recipes from different countries or measurement systems.
Travel & Navigation
Convert between miles and kilometers, Fahrenheit and Celsius, or gallons and liters when traveling internationally.
Science & Engineering
Quickly convert between metric and imperial units for lab work, technical specifications, or engineering calculations.
Fitness & Health
Convert body weight between kilograms and pounds, or distances between kilometers and miles for workout tracking.
Frequently Asked Questions
How accurate are the conversions?▾
Conversions use precise mathematical constants (e.g., 1 mile = 1.609344 km exactly). Results are as accurate as your browser's floating-point arithmetic allows.
Does the tool support metric and imperial units?▾
Yes. Each category includes both metric and imperial units, plus other common systems where applicable (e.g., nautical miles for length).
How does temperature conversion work?▾
Temperature conversion uses the exact formulas: °F = (°C × 9/5) + 32, and K = °C + 273.15. Unlike other units, temperature conversions involve offsets, not just multiplication.
Can I convert between units in different categories?▾
No. You can only convert between units within the same category (e.g., length to length). Cross-category conversions (e.g., weight to volume) depend on material density and are not supported.