Unit Converter
Convert between length, weight, temperature, volume, area, speed, data storage, and time units. Free and instant.
Length Converter
Convert between meters, kilometers, miles, feet, inches, and more.
Conversion Result
Popular Conversions
How to Use the Unit Converter
Step-by-Step Guide
- Select a category (Length, Weight, Temperature, etc.)
- Enter the value you want to convert in the "From" field
- Select the source unit from the dropdown
- Select the target unit in the "To" dropdown
- Click "Convert" or press Enter to see the result
Supported Unit Categories
- Length: meters, kilometers, miles, feet, inches, yards
- Weight: kilograms, grams, pounds, ounces, stones
- Temperature: Celsius, Fahrenheit, Kelvin
- Volume: liters, gallons, cups, tablespoons
- Area: square meters, acres, hectares, square feet
- Speed: mph, km/h, m/s, knots
- Data: bytes, KB, MB, GB, TB, bits
- Time: seconds, minutes, hours, days, weeks
Real-World Use Cases
International Travel
Convert between miles and kilometers for road trips, pounds and kilograms for luggage limits, and Fahrenheit to Celsius for weather forecasts. Essential for travelers visiting countries with different measurement systems.
Cooking & Recipes
Convert recipe measurements between cups, tablespoons, milliliters, and liters. Scale recipes up or down by converting between different volume and weight units. Perfect for following international recipes.
Science & Engineering
Perform accurate unit conversions for scientific calculations, engineering projects, and academic work. Convert between metric and imperial systems with precision for reliable results.
About Our Unit Converter
Our free online unit converter is a comprehensive tool designed to handle all your measurement conversion needs quickly and accurately. Whether you need to convert miles to kilometers for a road trip, convert pounds to kilograms for a recipe, or convert Fahrenheit to Celsius to understand weather forecasts, this converter has you covered with support for over 70 different units across 8 categories.
Unit conversion is essential in our globalized world where different countries use different measurement systems. The metric system (meters, kilograms, liters) is used by most countries, while the imperial system (feet, pounds, gallons) is primarily used in the United States. Our converter bridges this gap, making it easy to work with measurements from any source.
Understanding Measurement Systems
The International System of Units (SI), commonly known as the metric system, is the modern form of the metric system and is based on powers of ten. This makes conversions within the system straightforward—for example, 1 kilometer equals 1000 meters, and 1 kilogram equals 1000 grams. The metric system's logical structure makes it the preferred system for scientific work worldwide.
The imperial system, used predominantly in the United States, has historical roots in British measurements. While less intuitive (12 inches in a foot, 3 feet in a yard, 1760 yards in a mile), it remains deeply embedded in American daily life. Our converter handles all these conversions automatically, so you never need to memorize conversion factors.
Common Conversion Formulas
Length conversions: The most common length conversion is miles to kilometers. One mile equals exactly 1.609344 kilometers. To convert, multiply miles by 1.609344. For quick mental math, multiply by 1.6 for an approximate result.
Temperature conversions: Converting between Fahrenheit and Celsius requires a formula rather than simple multiplication. To convert Fahrenheit to Celsius: °C = (°F - 32) × 5/9. To convert Celsius to Fahrenheit: °F = °C × 9/5 + 32. Key reference points: water freezes at 0°C (32°F) and boils at 100°C (212°F).
Weight conversions: One kilogram equals approximately 2.205 pounds, or one pound equals about 0.4536 kilograms. For cooking, knowing that 1 ounce equals approximately 28.35 grams is helpful when following metric recipes.
Digital Data Units Explained
Understanding data storage units is increasingly important in our digital age. The base unit is the byte, which consists of 8 bits. Storage follows binary prefixes: 1 kilobyte (KB) = 1024 bytes, 1 megabyte (MB) = 1024 KB, 1 gigabyte (GB) = 1024 MB, and 1 terabyte (TB) = 1024 GB.
Network speeds are typically measured in bits per second rather than bytes. This is why a 100 Mbps internet connection downloads at approximately 12.5 MB per second—you divide by 8 to convert from bits to bytes. Our data converter handles both byte-based and bit-based units.
Practical Applications
Home improvement: When measuring rooms or ordering materials, you may need to convert between feet and meters, or between square feet and square meters. A room that's 12 feet by 15 feet (180 square feet) equals approximately 16.7 square meters.
Health and fitness: Tracking weight loss may require converting between pounds and kilograms depending on your scale and apps. Running distances are often given in both miles and kilometers—a 5K race is 3.1 miles, a 10K is 6.2 miles, and a marathon is 26.2 miles (42.2 km).
Cooking and baking: International recipes may use grams instead of cups, or milliliters instead of fluid ounces. Precise conversions are especially important in baking, where ingredient ratios significantly affect the final result. Our volume converter includes cups, tablespoons, teaspoons, and metric equivalents.