From meters to miles, from joules to calories, from pascal to bar – here you'll find over 30 free converters for all the important units in physics and chemistry. Just enter a value, choose units, done.
Different countries and fields use different systems of units: the metric SI system (meter, kilogram, second) is the international standard, while the US often uses imperial units (miles, pounds, Fahrenheit). In science, trades, and everyday life you regularly need to convert between these systems – our converters do that instantly and without errors.
Convert length units: meters, kilometers, inches, miles, and more, precisely and with an instant result.
Convert area units: square meters, hectares, acres, and more, precisely and with an instant result.
Convert mass units: grams, kilograms, pounds, ounces, and more weight units, quickly and reliably.
Convert volume units: liters, milliliters, cubic meters, and more, exactly converted into each other, including formula.
Convert temperatures between Celsius, Fahrenheit, and Kelvin – with conversion formula and instant result for school and lab.
Convert time units: seconds, minutes, hours, days, and years quickly, precisely, and with a traceable calculation path.
Convert frequencies between hertz, kilohertz, megahertz, and revolutions per minute – calculated precisely, with formula and example.
Convert angles between degree, radian, and gon – for math, physics, and surveying, with formula and instant result.
Convert energy units: joule, kilojoule, calories, kilowatt-hours, and more, exactly converted, with formula and example.
Convert molar/atomic energy: hartree, electronvolt, rydberg, kJ/mol, and kcal/mol – for quantum chemistry and spectroscopy.
Convert power between watt, kilowatt, PS, and horsepower – for vehicle and engineering comparisons, with formula and example.
Convert entropy: values in joule per kelvin and other thermodynamic units, exactly converted, with formula and example.
Convert speed between km/h, m/s, mph, and knots – ideal for physics, engineering, and everyday calculations, with calculation path.
Convert acceleration between m/s², g-force, and other physical units, with traceable formula and example.
Convert force between newton, kilopond, and pound-force – calculated precisely for physics, engineering, and mechanical design, with formula.
Convert torque between newton-meter and other common units in mechanics, with formula and instant result.
Convert pressure units: pascal, bar, psi, atmosphere, and more, precisely converted, with formula and example.
Convert density between kg/m³, g/cm³, and more – useful for chemistry, physics, and materials science, with calculation path.
Convert kinematic viscosity between stokes, m²/s, and other units of fluid dynamics, calculated precisely, with formula.
Convert dynamic viscosity between pascal-second, poise, and other common units, with formula and example.
Convert molar mass between g/mol, dalton, and kilodalton – calculated precisely for chemistry and biochemistry, with formula and example.
Convert amount of substance between nanomole, micromole, millimole, mole, and kilomole – calculated precisely for chemistry and lab work, with calculation path.
Convert mass concentration between g/L, mg/L, kg/m³, and more – calculated precisely for chemistry and lab work, with formula.
Convert molar concentration: convert molarity in mol/L and other concentration figures precisely, with calculation path.
Convert electrical capacitance between farad, microfarad, and other units of electrical engineering, calculated precisely, with formula.
Convert electrical voltage between volt, millivolt, and kilovolt – calculated precisely for electrical engineering and physics, with formula.
Convert electrical current between ampere, milliampere, and other units of electrical engineering, with formula and example.
Convert electrical resistance between ohm, kiloohm, and more – calculated precisely for electrical engineering, with calculation path.
Convert electric charge between coulomb, ampere-hours, and other common units, with formula and instant result.
Convert inductance between henry, millihenry, and other units of electrical engineering, calculated precisely, with formula.
Convert magnetic flux between weber, maxwell, and other physical units, calculated precisely, with formula and example.
Convert magnetic flux density between tesla, gauss, and other common units in physics, with formula and calculation path.
Convert illuminance between lux, phot, and footcandle – calculated precisely for optics and lighting technology, with formula.
Convert luminous flux between lumen and other units of lighting technology, calculated precisely, with traceable formula.
Convert luminous intensity between candela and other photometric units, calculated precisely for optics and engineering, with formula.
Convert luminance between candela per square meter and other photometric units, calculated precisely.
Convert radioactivity between becquerel, megabecquerel, and curie – for nuclear medicine and radiation protection, with formula.
Convert data sizes between byte, KB/MB/GB (decimal), and KiB/MiB/GiB (binary) – for IT and engineering, with formula and example.
Convert fuel consumption between l/100km, mpg (US/UK), and km/l – for international vehicle comparisons, with calculation path.