🔄 Unit Converter
Convert between units of length, weight, temperature, volume, speed, and data storage instantly.
How to Use the Unit Converter
Our free unit converter tool provides instant, accurate conversions across six major categories. Whether you need to convert kilometers to miles, kilograms to pounds, or Celsius to Fahrenheit, the process is simple and straightforward.
Step 1: Select a Category
Click on one of the six category tabs at the top of the converter: Length, Weight, Temperature, Volume, Speed, or Data. Each category contains the most commonly used units for that measurement type, giving you quick access to the conversions you need most.
Step 2: Choose Your Units
Use the "From" dropdown to select the unit you're converting from, and the "To" dropdown for the unit you're converting to. You can also click the swap button (↕) in the middle to instantly reverse the conversion direction — for example, switching from "km to miles" to "miles to km" with a single click.
Step 3: Enter Your Value
Type the numeric value you want to convert in the input field. The result updates instantly as you type — no need to press a button. You can enter whole numbers, decimals, or negative values (useful for temperature conversions). The large result display shows your converted value with high precision.
Step 4: Copy or Reset
Click Copy Result to copy the conversion to your clipboard, ready to paste anywhere. Use the Reset button to return to default settings. The converter formula is also displayed below the result for reference and verification.
About Unit Conversion
A unit converter is an indispensable tool for students, engineers, scientists, travelers, cooks, and anyone who works with measurements from different systems. Unit conversion bridges the gap between the metric system (used by most of the world) and the imperial system (primarily used in the United States).
Metric vs. Imperial
The metric system (SI — International System of Units) is based on powers of 10, making conversions within the system straightforward. For example, 1 kilometer = 1,000 meters, and 1 kilogram = 1,000 grams. The imperial system uses less intuitive relationships: 1 mile = 5,280 feet, and 1 pound = 16 ounces. Our converter handles all these relationships seamlessly.
Temperature Conversions
Temperature conversion is unique because it involves both multiplication and addition, unlike most other unit conversions. The relationship between Celsius and Fahrenheit is °F = (°C × 9/5) + 32, while Kelvin is simply °C + 273.15. Our converter handles all three scales accurately, including negative temperatures and absolute zero.
Digital Data Units
In computing, data storage uses binary prefixes based on powers of 1,024 (not 1,000). So 1 KB = 1,024 bytes, 1 MB = 1,024 KB, and so on up to petabytes. Understanding these conversions is essential when evaluating storage capacity, file sizes, internet speeds, and data transfer rates. Our data converter uses the standard binary definitions for accurate results.
Frequently Asked Questions
Our unit converter supports six categories: Length (mm, cm, m, km, inch, foot, yard, mile), Weight (mg, g, kg, ounce, pound, ton), Temperature (Celsius, Fahrenheit, Kelvin), Volume (ml, liter, gallon, quart, cup, tablespoon, teaspoon), Speed (m/s, km/h, mph, knots), and Data Storage (bytes, KB, MB, GB, TB, PB).
Our conversions use precise mathematical formulas and standard conversion factors. Results are displayed with up to 6 significant digits for maximum accuracy. The formulas used match those from the International Bureau of Weights and Measures (BIPM) and other standards organizations.
In computing, storage is measured in binary (base-2). One kilobyte (KB) equals 1,024 bytes (2^10), one megabyte (MB) equals 1,024 KB, and so on. This is the traditional binary definition used by operating systems and most software. Some manufacturers use 1,000 (the decimal/SI definition), which is why a "500 GB" drive shows less space in your OS.
The formula is °C = (°F − 32) × 5/9. Simply select Temperature category, choose Fahrenheit in the "From" dropdown, Celsius in the "To" dropdown, and enter your value. For example, 72°F equals approximately 22.2°C. Our converter handles this automatically with full precision.
Absolutely. All conversions are calculated entirely in your browser using JavaScript. No data is sent to any server. The converter works even without an internet connection once the page is loaded. Your privacy is fully protected.