Xunits Site Index

Everyday Measurements

Common converters for length, weight, area, volume, speed, time, temperature, and travel.

Length

Convert metric, imperial, and US customary length units for height, distance, construction, and everyday measurements.

cm to inches meters to feet inches to cm feet to meters km to miles miles to km

Weight and Mass

Convert common weight and mass units for body weight, shipping, cooking, science, and fitness tracking.

kg to lbs lbs to kg grams to ounces ounces to grams lbs to ounces ounces to lbs

Temperature

Convert Celsius, Fahrenheit, and Kelvin values for weather, cooking, science, and engineering.

fahrenheit to celsius celsius to fahrenheit celsius to kelvin kelvin to celsius fahrenheit to kelvin kelvin to fahrenheit

Volume

Convert liquid volume units for fuel, water, recipes, containers, and household measurements.

liters to gallons gallons to liters ml to cups cups to ml fluid-ounces to ml ml to fluid-ounces

Area

Convert land, floor, and surface area units including acres, square feet, square meters, and hectares.

acres to square-feet square-feet to acres square-meters to square-feet square-feet to square-meters hectares to acres acres to hectares

Speed

Convert speed units for driving, running, aviation, weather, and physics calculations.

mph to kph kph to mph meters-per-second to mph mph to meters-per-second knots to mph mph to knots

Time

Convert seconds, minutes, hours, days, weeks, months, and years for schedules and calculations.

hours to minutes minutes to hours days to hours hours to days weeks to days days to weeks

Angle

Convert angle units for geometry, trigonometry, navigation, surveying, machining, and engineering.

degrees to radians radians to degrees degrees to gradians gradians to degrees arcminutes to degrees degrees to arcminutes

Fuel Economy

Convert fuel economy and fuel consumption units for cars, travel, vehicle specifications, and international MPG comparisons.

mpg-us to liters-per-100-km liters-per-100-km to mpg-us mpg-us to mpg-uk mpg-uk to mpg-us kilometers-per-liter to mpg-us mpg-us to kilometers-per-liter

Mechanical and Fluids

Engineering converters for force, pressure, torque, density, flow, acceleration, viscosity, and transport.

Pressure

Convert pressure units for tires, weather, hydraulics, engineering, pumps, and industrial measurements.

psi to bar pascals to kpa kpa to pascals bar to psi atm to pascals pascals to atm

Force

Convert force units for mechanics, lifting, structural loads, machine ratings, and physics calculations.

newtons to pound-force pound-force to newtons newtons to kilogram-force kilogram-force to newtons kilonewtons to newtons newtons to kilonewtons

Torque

Convert torque units for engines, motors, fasteners, tools, machinery, and mechanical engineering.

newton-meters to pound-feet pound-feet to newton-meters newton-meters to pound-inches pound-inches to newton-meters kgf-meters to newton-meters kilonewton-meters to newton-meters

Density

Convert density units for materials, fluids, chemistry, engineering, and product specifications.

kg-per-cubic-meter to g-per-cubic-cm g-per-cubic-cm to kg-per-cubic-meter kg-per-cubic-meter to lb-per-cubic-foot lb-per-cubic-foot to kg-per-cubic-meter g-per-liter to kg-per-cubic-meter lb-per-gallon to kg-per-cubic-meter

Flow Rate

Convert flow rate units for water systems, pumps, HVAC, process engineering, and fluid calculations.

liters-per-minute to gallons-per-minute gallons-per-minute to liters-per-minute cubic-feet-per-minute to liters-per-second liters-per-second to cubic-feet-per-minute cubic-meters-per-second to liters-per-second liters-per-second to cubic-meters-per-second

Mass Flow Rate

Convert mass flow rate units for process engineering, HVAC, fuel systems, chemical plants, and fluid calculations.

kilograms-per-second to pounds-per-second pounds-per-second to kilograms-per-second kilograms-per-hour to pounds-per-hour pounds-per-hour to kilograms-per-hour metric-tons-per-hour to kilograms-per-hour kilograms-per-hour to metric-tons-per-hour

Mass Flux

Convert mass flux units for fluid flow, filtration, process engineering, membranes, combustion, and transport calculations.

kilograms-per-square-meter-second to grams-per-square-centimeter-second grams-per-square-centimeter-second to kilograms-per-square-meter-second kilograms-per-square-meter-hour to kilograms-per-square-meter-second kilograms-per-square-meter-second to kilograms-per-square-meter-hour pounds-per-square-foot-second to kilograms-per-square-meter-second kilograms-per-square-meter-second to pounds-per-square-foot-second

Acceleration

Convert acceleration units for physics, vehicles, motion analysis, vibration, and engineering calculations.

meters-per-second-squared to feet-per-second-squared feet-per-second-squared to meters-per-second-squared g-force to meters-per-second-squared meters-per-second-squared to g-force gal to meters-per-second-squared meters-per-second-squared to gal

Dynamic Viscosity

Convert dynamic viscosity units for fluids, oils, coatings, polymers, pumps, and process engineering.

pascal-seconds to millipascal-seconds pascal-seconds to centipoise pascal-seconds to poise pascal-seconds to pounds-per-foot-second pascal-seconds to pounds-per-foot-hour millipascal-seconds to pascal-seconds

Kinematic Viscosity

Convert kinematic viscosity units for oils, fluids, hydraulics, lubrication, process data, and material specifications.

centistokes to square-millimeters-per-second square-millimeters-per-second to centistokes stokes to centistokes centistokes to stokes square-meters-per-second to stokes stokes to square-meters-per-second

Surface Tension

Convert surface tension units for fluids, coatings, inks, chemistry, materials testing, and process engineering.

newtons-per-meter to dynes-per-centimeter dynes-per-centimeter to newtons-per-meter millinewtons-per-meter to dynes-per-centimeter dynes-per-centimeter to millinewtons-per-meter pound-force-per-inch to newtons-per-meter newtons-per-meter to pound-force-per-inch

Specific Volume

Convert specific volume units for thermodynamics, fluids, steam tables, gas properties, and engineering calculations.

cubic-meters-per-kilogram to cubic-feet-per-pound cubic-feet-per-pound to cubic-meters-per-kilogram liters-per-kilogram to cubic-centimeters-per-gram cubic-centimeters-per-gram to liters-per-kilogram cubic-feet-per-pound to us-gallons-per-pound us-gallons-per-pound to cubic-feet-per-pound

Energy and Thermal

Thermal and energy converters for heat transfer, power, specific heat, capacity, flux, and storage.

Energy

Convert energy units for electricity, nutrition, heating, physics, appliances, and engineering work.

kwh to joules joules to kilojoules kilojoules to joules calories to joules joules to calories kcal to calories

Power

Convert power units for engines, motors, appliances, HVAC systems, electricity, and mechanical output.

horsepower to kilowatts watts to kilowatts kilowatts to watts kilowatts to horsepower megawatts to kilowatts kilowatts to megawatts

Heat Capacity

Convert heat capacity units for thermal systems, calorimetry, materials, energy storage, heating, and engineering calculations.

joules-per-kelvin to kilojoules-per-kelvin kilojoules-per-kelvin to joules-per-kelvin calories-per-celsius to joules-per-kelvin joules-per-kelvin to calories-per-celsius kilocalories-per-celsius to kilojoules-per-kelvin kilojoules-per-kelvin to kilocalories-per-celsius

Specific Heat

Convert specific heat capacity units for materials, thermal analysis, chemistry, HVAC, and energy calculations.

joules-per-kilogram-kelvin to kilojoules-per-kilogram-kelvin joules-per-kilogram-kelvin to calories-per-gram-celsius joules-per-kilogram-kelvin to kilocalories-per-kilogram-celsius joules-per-kilogram-kelvin to btu-per-pound-fahrenheit kilojoules-per-kilogram-kelvin to joules-per-kilogram-kelvin kilojoules-per-kilogram-kelvin to calories-per-gram-celsius

Thermal Conductivity

Convert thermal conductivity units for insulation, materials, heat transfer, HVAC, and engineering specifications.

watts-per-meter-kelvin to btu-per-hour-foot-fahrenheit watts-per-meter-kelvin to calories-per-second-centimeter-celsius watts-per-meter-kelvin to kilocalories-per-hour-meter-celsius btu-per-hour-foot-fahrenheit to watts-per-meter-kelvin btu-per-hour-foot-fahrenheit to calories-per-second-centimeter-celsius btu-per-hour-foot-fahrenheit to kilocalories-per-hour-meter-celsius

Thermal Resistance

Convert thermal resistance units for electronics cooling, heat sinks, HVAC, insulation, thermal design, and heat-flow calculations.

kelvins-per-watt to celsius-per-watt celsius-per-watt to kelvins-per-watt kelvins-per-kilowatt to kelvins-per-watt kelvins-per-watt to kelvins-per-kilowatt kelvins-per-milliwatt to kelvins-per-watt kelvins-per-watt to kelvins-per-milliwatt

Heat Transfer Coefficient

Convert heat transfer coefficient units for convection, heat exchangers, HVAC, thermal design, process equipment, and building physics.

watts-per-square-meter-kelvin to btu-per-hour-square-foot-fahrenheit btu-per-hour-square-foot-fahrenheit to watts-per-square-meter-kelvin kilowatts-per-square-meter-kelvin to watts-per-square-meter-kelvin watts-per-square-meter-kelvin to kilowatts-per-square-meter-kelvin watts-per-square-meter-celsius to watts-per-square-meter-kelvin calories-per-second-square-centimeter-celsius to watts-per-square-meter-kelvin

Heat Flux

Convert heat flux density units for heat transfer, solar radiation, thermal systems, furnaces, and engineering analysis.

watts-per-square-meter to kilowatts-per-square-meter watts-per-square-meter to watts-per-square-centimeter watts-per-square-meter to btu-per-hour-square-foot watts-per-square-meter to calories-per-second-square-centimeter kilowatts-per-square-meter to watts-per-square-meter kilowatts-per-square-meter to watts-per-square-centimeter

Energy Density

Convert energy density units for fuels, batteries, gases, materials, thermal storage, and engineering comparisons.

joules-per-cubic-meter to kilojoules-per-cubic-meter kilojoules-per-cubic-meter to joules-per-cubic-meter megajoules-per-cubic-meter to joules-per-liter joules-per-liter to megajoules-per-cubic-meter watt-hours-per-liter to megajoules-per-cubic-meter megajoules-per-cubic-meter to watt-hours-per-liter

Electrical and Magnetic

Electrical and magnetic units for circuits, fields, charge, capacitance, inductance, and magnetic materials.

Electric Current

Convert electric current units for electronics, circuits, power supplies, sensors, and electrical specifications.

amps to milliamps milliamps to amps amps to microamps microamps to amps kiloamps to amps amps to kiloamps

Electric Voltage

Convert electric voltage units for electronics, power systems, batteries, sensors, and electrical design.

volts to millivolts millivolts to volts volts to kilovolts kilovolts to volts microvolts to volts megavolts to kilovolts

Electric Charge

Convert electric charge units for physics, batteries, circuits, electrochemistry, and electrical calculations.

coulombs to millicoulombs millicoulombs to coulombs coulombs to microcoulombs microcoulombs to coulombs ampere-hours to coulombs coulombs to ampere-hours

Electric Resistance

Convert electric resistance units for circuits, sensors, resistors, cables, electronics, and electrical engineering.

ohms to kiloohms kiloohms to ohms ohms to megaohms megaohms to ohms milliohms to ohms ohms to milliohms

Electric Capacitance

Convert capacitance units for capacitors, filters, power electronics, sensors, and circuit design.

microfarads to nanofarads nanofarads to microfarads nanofarads to picofarads picofarads to nanofarads farads to microfarads microfarads to farads

Electric Conductance

Convert electric conductance units for circuits, water conductivity, electronics, materials, and sensor data.

siemens to millisiemens millisiemens to siemens millisiemens to microsiemens microsiemens to millisiemens siemens to mhos mhos to siemens

Electric Conductivity

Convert electric conductivity units for water quality, materials, sensors, chemistry, electronics, and industrial measurements.

siemens-per-meter to microsiemens-per-centimeter microsiemens-per-centimeter to siemens-per-meter millisiemens-per-centimeter to siemens-per-meter siemens-per-meter to millisiemens-per-centimeter millisiemens-per-meter to microsiemens-per-centimeter microsiemens-per-centimeter to millisiemens-per-meter

Electric Resistivity

Convert electric resistivity units for materials, wires, conductors, semiconductors, geophysics, and electrical testing.

ohm-meters to ohm-centimeters ohm-centimeters to ohm-meters ohm-meters to microohm-meters microohm-meters to ohm-meters microohm-centimeters to ohm-mm2-per-meter ohm-mm2-per-meter to microohm-centimeters

Electric Inductance

Convert inductance units for inductors, coils, transformers, RF circuits, power electronics, and electrical design.

henries to millihenries millihenries to henries millihenries to microhenries microhenries to millihenries microhenries to nanohenries nanohenries to microhenries

Electric Field Strength

Convert electric field strength units for electrostatics, high-voltage systems, sensors, insulation testing, and physics.

volts-per-meter to kilovolts-per-meter kilovolts-per-meter to volts-per-meter volts-per-centimeter to volts-per-meter volts-per-meter to volts-per-centimeter kilovolts-per-centimeter to kilovolts-per-meter kilovolts-per-meter to kilovolts-per-centimeter

Magnetic Flux

Convert magnetic flux units for electromagnetics, motors, generators, sensors, magnetic circuits, and physics.

webers to maxwells maxwells to webers webers to milliwebers milliwebers to webers milliwebers to microwebers microwebers to milliwebers

Magnetic Flux Density

Convert magnetic flux density units for magnets, sensors, motors, MRI references, physics, and electrical engineering.

tesla to millitesla tesla to microtesla tesla to gauss tesla to kilogauss millitesla to tesla millitesla to microtesla

Magnetic Field Strength

Convert magnetic field strength units for electromagnets, coils, magnetic materials, motors, sensors, and physics.

amperes-per-meter to oersted oersted to amperes-per-meter kiloamperes-per-meter to oersted oersted to kiloamperes-per-meter ampere-turns-per-meter to amperes-per-meter amperes-per-meter to ampere-turns-per-meter

Magnetic Permeability

Convert magnetic permeability units for materials, electromagnetics, inductors, magnetic cores, and physics references.

henries-per-meter to microhenries-per-meter microhenries-per-meter to henries-per-meter millihenries-per-meter to microhenries-per-meter microhenries-per-meter to millihenries-per-meter nanohenries-per-meter to microhenries-per-meter microhenries-per-meter to nanohenries-per-meter

Magnetomotive Force

Convert magnetomotive force units for coils, magnetic circuits, motors, transformers, solenoids, and electromagnets.

ampere-turns to gilberts gilberts to ampere-turns kiloampere-turns to ampere-turns ampere-turns to kiloampere-turns milliampere-turns to ampere-turns ampere-turns to milliampere-turns

Light and Radiation

Optical, lighting, luminance, radiation, activity, and dose-related converters.

Illumination

Convert illuminance units for lighting design, photography, workplaces, architecture, and optical calculations.

lux to foot-candles lux to phots lux to nox lux to meter-candles foot-candles to lux foot-candles to phots

Luminance

Convert luminance units for displays, lighting, photometry, optical instruments, and visual performance calculations.

candelas-per-square-meter to nits candelas-per-square-meter to stilbs candelas-per-square-meter to lamberts candelas-per-square-meter to foot-lamberts nits to candelas-per-square-meter nits to stilbs

Luminous Flux

Convert luminous flux units for lighting output, lamps, LEDs, projectors, fixtures, photometry, and optical specifications.

lumens to kilolumens kilolumens to lumens lumens to millilumens millilumens to lumens megalumens to kilolumens kilolumens to megalumens

Luminous Intensity

Convert luminous intensity units for LEDs, lamps, optical instruments, photometry, beacons, and lighting specifications.

candela to millicandela millicandela to candela kilocandela to candela candela to kilocandela megacandela to kilocandela kilocandela to megacandela

Radiation Dose

Convert absorbed radiation dose units for physics, radiation measurement, dosimetry references, and lab calculations.

gray to milligray gray to microgray gray to kilogray gray to rad milligray to gray milligray to microgray

Radiation Dose Equivalent

Convert dose equivalent units for radiation protection, dosimetry, medical imaging references, and safety reporting.

sieverts to rem rem to sieverts millisieverts to millirem millirem to millisieverts microsieverts to millisieverts millisieverts to microsieverts

Radioactivity

Convert radioactivity units for nuclear physics, lab activity, isotope references, radiation safety, and medical sources.

becquerels to curies curies to becquerels megabecquerels to millicuries millicuries to megabecquerels kilobecquerels to microcuries microcuries to kilobecquerels

Chemistry and Medical

Chemistry, concentration, trace-ratio, molar, and medical reading converters.

Concentration

Convert mass concentration units for water quality, chemistry, environmental data, dosing, and laboratory measurements.

kilograms-per-cubic-meter to grams-per-liter kilograms-per-cubic-meter to milligrams-per-liter kilograms-per-cubic-meter to grams-per-cubic-meter kilograms-per-cubic-meter to micrograms-per-liter grams-per-liter to kilograms-per-cubic-meter grams-per-liter to milligrams-per-liter

Molar Concentration

Convert molar concentration units for chemistry, lab solutions, analytical data, reaction calculations, and dilution work.

molar to millimolar millimolar to molar millimolar to micromolar micromolar to millimolar moles-per-liter to moles-per-cubic-meter moles-per-cubic-meter to moles-per-liter

Parts per Million

Convert ppm, ppb, ppt, percent, per mille, and fraction values for concentration ratios, water quality, chemistry, and environmental data.

ppm to ppb ppb to ppm ppm to percent percent to ppm ppb to ppt ppt to ppb

Blood Sugar

Convert blood glucose units for diabetes tracking, lab reports, medical devices, nutrition logs, and international glucose readings.

mg-per-dl to mmol-per-liter mmol-per-liter to mg-per-dl mg-percent to mmol-per-liter mmol-per-liter to mg-percent grams-per-liter to mg-per-dl mg-per-dl to grams-per-liter

Digital and Signals

Computer, network, frequency, storage, transfer-rate, and rotational converters.

Data Storage

Convert digital storage units including bytes, kilobytes, megabytes, gigabytes, and terabytes.

mb to gb gb to mb gb to tb tb to gb kb to mb mb to kb

Data Transfer Rate

Convert data transfer rate units for internet speed, bandwidth, downloads, uploads, network links, and storage throughput.

megabits-per-second to megabytes-per-second megabytes-per-second to megabits-per-second kilobits-per-second to megabits-per-second megabits-per-second to kilobits-per-second gigabits-per-second to megabits-per-second megabits-per-second to gigabits-per-second

Frequency

Convert frequency units for electronics, signals, audio, radio, computing, and rotational speed.

hz to khz khz to hz mhz to hz ghz to mhz rpm to hz hz to rpm

Angular Velocity

Convert angular velocity units for rotating machinery, motors, wheels, turbines, robotics, physics, and motion analysis.

rpm-angular to radians-per-second radians-per-second to rpm-angular degrees-per-second to radians-per-second radians-per-second to degrees-per-second revolutions-per-second to rpm-angular rpm-angular to revolutions-per-second