Free Online Unit Converter
CalcPick's unit converter covers 17 measurement categories with over 100 individual units. Each category has a dedicated converter page with detailed reference tables, conversion formulas, and frequently asked questions. Whether you need everyday conversions like miles to kilometers or specialized conversions like sieverts to rem, every tool is free and works instantly in your browser.
Available Conversion Categories
Everyday Units: Length (meters, feet, miles), Weight (kilograms, pounds, ounces), Temperature (Celsius, Fahrenheit, Kelvin), Volume (liters, gallons, cups), Time (seconds to years), and Speed (km/h, mph, knots).
Engineering & Science: Pressure (Pascal, PSI, bar), Energy (joules, kWh, BTU), Power (watts, horsepower), Force (newtons, pound-force), Angle (degrees, radians), and Radiation (sieverts, rem, grays).
Technology & Transport: Digital Storage (bytes to petabytes), Data Rate (Mbps, GB/s), Fuel Economy (MPG, L/100km), and Frequency (Hz, MHz, GHz).
Area (square meters, acres, hectares) rounds out the collection for real estate and land measurement needs.
Frequently Asked Questions
How many unit categories does this converter support?
This unit converter supports 17 categories including Length, Weight, Temperature, Area, Volume, Speed, Time, Digital Storage, Pressure, Energy, Radiation, Frequency, Power, Angle, Force, Data Rate, and Fuel Economy. Each category has its own dedicated page with detailed conversion tables and reference information.
How does temperature conversion work differently from other units?
Temperature conversion uses non-linear formulas rather than simple multiplication. Converting between Celsius, Fahrenheit, and Kelvin requires specific formulas: °F = °C × 9/5 + 32, and K = °C + 273.15. All other unit categories use a linear base-unit ratio for conversion.
Can I convert in both directions?
Yes, the converter supports bidirectional input. You can type a value in either the left or right input field, and the other field will update automatically with the converted result. You can also use the swap button to quickly reverse the from and to units.
Are the conversions accurate for professional use?
Yes, all conversions use precise mathematical constants and formulas. Results are displayed with up to 10 significant digits of precision, suitable for engineering, scientific, and professional applications. Temperature and fuel economy conversions use their respective non-linear formulas for exact results.