Online Unit Converter | Free Conversion Calculator
Free online unit converter and measurement calculator. Instantly convert length, weight, volume, temperature, and more with accurate results.
Unit Converter
Quickly convert between hundreds of different units of measurement.
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The Ultimate Online Unit Converter
Why Use Our Unit Converter?
Our free online unit converter is a powerful and easy-to-use conversion calculator designed to handle all your measurement needs in one place. Whether you're a student, an engineer, a chef, or just need to make a quick calculation, our tool provides instant and accurate conversions for hundreds of units.
All-in-One Conversion Calculator
Forget bookmarking dozens of different tools. Our unit converter is a complete solution, featuring 12 different categories in one convenient interface. Seamlessly switch between a length converter, a weight conversion tool, a temperature calculator, and much more.
Instant & Accurate Results
Get your answers in real-time. As you type a value into the "From" field, the converted value in the "To" field updates instantly. Our calculations are precise, providing you with a reliable converter calculator for all your tasks.
Comprehensive & Easy to Use
With hundreds of units and a clean, tabbed interface, finding the unit conversion you need is simple. Our tool is designed to be intuitive for both quick lookups and complex calculations.
Maximum Privacy with Client-Side Processing
Your privacy is our top priority. This tool operates entirely within your web browser. This means your data and calculations are never uploaded to our servers. All conversions happen directly on your own device, ensuring your inputs remain 100% private and secure.
How to Convert Units
Select Category
Choose the type of measurement you need from the tabs (e.g., Length, Mass, Volume).
Enter Value
Type the number you want to convert into the "From" input box.
Choose Units
Select your starting unit and the unit you want to convert to from the dropdown menus.
View Result
The accurately converted value appears instantly in the "To" input box.
About the Online Unit Converter
In a world of different measurement systems, a reliable unit converter is an essential tool. It bridges the gap between metric and imperial, scientific and household measurements. Our tool is designed to be the only online conversion resource you'll need, whether you're converting feet to meters for a construction project or milliliters to cups for a recipe.
Comprehensive Unit Conversions
Our tool supports hundreds of conversions across 12 different categories. Below is a full list of the units you can convert.
Length Conversion
Millimeters (mm), Centimeters (cm), Meters (m), Kilometers (km), Inches (in), Yards (yd), US Survey Feet (ft-us), Feet (ft), Miles (mi)
Mass & Weight Conversion
Micrograms (mcg), Milligrams (mg), Grams (g), Kilograms (kg), Metric Tonnes (mt), Ounces (oz), Pounds (lb), Tons (t)
Volume Conversion
Cubic Millimeters (mm3), Cubic Centimeters (cm3), Millilitres (ml), Litres (l), Cubic meters (m3), Teaspoons (tsp), Tablespoons (Tbs), Fluid Ounces (fl-oz), Cups (cup), Pints (pnt), Quarts (qt), Gallons (gal), Cubic feet (ft3), and many more.
Temperature Conversion
Celsius (°C), Kelvin (K), Fahrenheit (°F), Rankine (°R)
Area Conversion
Square Millimeters (mm2), Square Meters (m2), Hectares (ha), Square Kilometers (km2), Square Inches (in2), Square Feet (ft2), Acres (ac), Square Miles (mi2)
Speed Conversion
Metres per second (m/s), Kilometres per hour (km/h), Miles per hour (mph), Knots (knot), Feet per second (ft/s)
Time Conversion
Nanoseconds (ns), Milliseconds (ms), Seconds (s), Minutes (min), Hours (h), Days (d), Weeks, Months, Years
Pressure Conversion
Pascals (Pa), Kilopascals (kPa), Bar (bar), Pounds per square inch (psi), Torr (torr)
Power Conversion
Watts (W), Kilowatts (kW), Megawatts (MW), Gigawatts (GW)
Energy Conversion
Joules (J), Kilojoules (kJ), Watt-hours (Wh), Kilowatt-hours (kWh)
Digital Storage Conversion
Bits (b), Bytes (B), Kilobytes (KB), Megabytes (MB), Gigabytes (GB), Terabytes (TB)
Angle Conversion
Radians (rad), Degrees (deg), Gradians (grad), Arcminutes (arcmin), Arcseconds (arcsec)