Unit Converter.
Convert between length, weight, temperature, area, volume, speed, and data storage units instantly.
Popular Dedicated Unit Conversions
Direct conversion calculators, exact formulas, and reference tables for everyday measurements.
How to Use Our Free Unit Converter
Our unit converter supports seven categories of measurement: length, weight (mass), temperature, area, volume, speed, and data storage. Select a category using the tabs at the top, choose your source and target units from the dropdown menus, and enter a value. The conversion happens instantly as you type, with results displayed immediately. Click the swap button to quickly reverse the conversion direction.
Metric vs. Imperial Systems
The world primarily uses two measurement systems: the metric system (used by most countries) and the imperial system (used primarily in the United States, Liberia, and Myanmar). Our converter makes it effortless to switch between these systems. Need to convert kilometers to miles for a US road trip? Kilograms to pounds for a recipe? Celsius to Fahrenheit for a weather report? Simply select the units and get your answer instantly. We support all common metric and imperial units across every category.
Common Unit Conversions
The most popular unit conversions on our platform include: km to miles (multiply by 0.621371), kg to lbs (multiply by 2.20462), Celsius to Fahrenheit (multiply by 9/5, then add 32), liters to gallons (multiply by 0.264172), meters to feet (multiply by 3.28084), and MB to GB (divide by 1024). While these formulas are straightforward, our converter eliminates the mental math and ensures precision every time.
Data Storage Units Explained
Our data storage converter supports conversions between bits, bytes, kilobytes (KB), megabytes (MB), gigabytes (GB), terabytes (TB), and petabytes (PB). Digital storage uses a base-1024 system (binary) where 1 KB = 1,024 bytes, 1 MB = 1,024 KB, and so on. This is different from the base-1000 system sometimes used by hard drive manufacturers (where 1 GB = 1,000,000,000 bytes). Our converter uses the standard binary (IEC) definitions used by operating systems and most software.
Unit Converter FAQ
How accurate are the unit conversions?
Our unit conversions use the exact mathematical conversion factors defined by international standards (SI units). All calculations are performed using JavaScript's double-precision floating point arithmetic, providing accuracy to at least 10 significant digits for all supported unit types.
What unit categories do you support?
We support seven measurement categories: Length (mm, cm, m, km, inches, feet, yards, miles), Weight (mg, g, kg, oz, lbs, stones, tons), Temperature (Celsius, Fahrenheit, Kelvin), Area (sq mm to sq miles, hectares, acres), Volume (mL to gallons, liters, cups, pints), Speed (m/s, km/h, mph, knots), and Data Storage (bits, bytes, KB, MB, GB, TB, PB).
Why does temperature conversion work differently?
Unlike other unit types that use simple multiplication factors, temperature conversions involve both multiplication and addition/subtraction. For example, Celsius to Fahrenheit requires multiplying by 9/5 and then adding 32. This is because temperature scales have different zero points — 0°C is 32°F, not 0°F. Our converter handles these offset-based conversions automatically and accurately.
How many feet are in a meter?
1 meter equals 3.28084 feet. Conversely, 1 foot equals 0.3048 meters. This is a standard conversion used in engineering, construction, and everyday measurement.
How do you convert kg to lbs?
To convert kilograms to pounds, multiply by 2.20462. For example, 70 kg × 2.20462 = 154.32 lbs. To convert pounds to kilograms, divide by 2.20462 (or multiply by 0.453592).
How do you convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit, use the formula: °F = (°C × 9/5) + 32. For example, 100°C = (100 × 9/5) + 32 = 212°F. To convert Fahrenheit to Celsius: °C = (°F − 32) × 5/9.
How many kilometers are in a mile?
1 mile equals 1.60934 kilometers. Conversely, 1 kilometer equals 0.621371 miles. So if you're driving 60 mph, that's approximately 96.56 km/h.
How many ounces are in a pound?
There are 16 ounces in 1 pound. So 1 oz = 0.0625 lbs. In metric, 1 pound = 453.592 grams and 1 ounce = 28.3495 grams.