Free Online Unit Converters

Convert distance and length units in seconds.

Convert weights between pounds, kilograms, and ounces.

Convert temperatures between Celsius, Fahrenheit, and Kelvin.

Convert area between square feet, square meters, and acres.

Convert liquid volumes between gallons, liters, and cups.

Convert speeds between MPH, KM/H, and meters per second.

Convert file sizes between bytes, MB, GB, and TB.

Convert internet speeds between Mbps and MB/s.

Calculate screen pixel density (PPI) and aspect ratios.

Convert color codes between HEX, RGB, and HSL formats.

Convert time between seconds, minutes, hours, and days.

Convert numbers between binary, decimal, and hex bases.

Convert numbers to Roman numerals and back with ease.

Convert energy units between Joules, Calories, and kWh.

Convert power units between Watts, Kilowatts, and Horsepower.

Convert pressure between PSI, Bar, and Pascals in seconds.

Convert Newtons, Pound-force, and Dynes.

Convert torque between Newton-meters and Foot-pounds.

Convert material densities between metric and imperial units.

Convert Degrees, Radians, and Gradians.

Convert footwear sizes between US, UK, and EU scales.

Convert clothing sizes across US, UK, and EU standards.

Convert recipe measurements between cups, spoons, and grams.

Look up standard paper dimensions for A4, Letter, and more.

Convert global currencies with live market rates.