Converters
Everyday unit converters
Choose a measurement category, then open a focused conversion with a clear formula, examples, and reference table.
Length
89 available conversions
Convert metric, Imperial, nautical, astronomical, typographic, historical, and scientific distance units including all SI prefixes from attometers to exameters, parsecs, Planck length, and cosmic scales.
Weight
19 available conversions
Convert milligrams, grams, kilograms, ounces, pounds, stone, tons, carats, troy ounces, and more with precise mass conversion factors.
Temperature
9 available conversions
Convert between Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Delisle, and Newton temperature scales.
Time
15 available conversions
Convert between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, fortnights, months, quarters, years, decades, centuries, millennia, sidereal days, and Julian years.
Area
23 available conversions
Convert metric, Imperial, survey, scientific, and clearly defined regional land-area units.
Volume & Capacity
24 available conversions
Convert metric, US liquid, cubic, barrel, dry-volume, cooking, and explicitly defined drop units.
Dry Volume
14 available conversions
Convert explicitly labeled US customary and UK Imperial dry-volume measures without mixing them with liquid units.
Speed
1124 available conversions
Convert between meters per second, km/h, mph, feet per second, knots, Mach, speed of light, and various other speed units.
Acceleration
5 available conversions
Convert between meters per second squared, feet per second squared, Gals, standard gravity, and centimeters per second squared.
Angle
8 available conversions
Convert between degrees, radians, gradians, arcminutes, arcseconds, turns, milliradians, and compass points.
Force
930 available conversions
Convert between newtons, kilonewtons, dynes, kilogram-force, gram-force, pound-force, ounce-force, kip-force, and many other force units.
Energy & Work
2862 available conversions
Convert between joules, kilojoules, megajoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, therms, foot-pounds, electronvolts, ergs, tons of TNT, barrels of oil equivalent, and many other energy units.
Power
2162 available conversions
Convert between watts, kilowatts, megawatts, horsepower (mechanical, metric, electrical, boiler), BTU/hour, tons of refrigeration, and many other power units.
Fuel Economy
7 available conversions
Convert between MPG (US), MPG (UK), L/100km, km/L, mL/100mi, and US gallons per 100 miles for vehicle fuel efficiency.
Pressure
2862 available conversions
Convert between pascals, kilopascals, megapascals, bars, millibars, PSI, PSF, standard atmosphere, technical atmosphere, torr, mmHg, cmH₂O, inHg, and many other pressure units.
Data Storage
16 available conversions
Convert between bits, bytes, kilobits, kilobytes, megabits, megabytes, gigabits, gigabytes, terabits, terabytes, petabytes, pebibytes, kibibytes, mebibytes, and gibibytes.
Data Transfer Rate
15 available conversions
Convert between bps, Kbps, Mbps, Gbps, KB/s, MB/s, GB/s, MiB/s, and network speed for internet and data transfer measurements.
Frequency
14 available conversions
Convert between hertz, kilohertz, megahertz, gigahertz, terahertz, RPM, radians per second, and beats per minute.
Sound
7 available conversions
Convert between decibel ratios, dBm, dBu, dBV, watt, volt, and sound pressure level (pascals) for audio engineering.
Digital Image
7 available conversions
Convert between pixels, megapixels, PPI, DPI, and calculate print sizes at common resolutions.
Cooking Measurements
32 available conversions
Convert cups, tablespoons, teaspoons, fluid ounces, milliliters, liters, and ingredient-specific weight conversions for flour, sugar, butter, rice, milk, oil, honey, and yeast.
Density
1056 available conversions
Convert between kilograms per cubic meter, grams per liter, pounds per cubic foot, and more for substance density measurements.
Torque
240 available conversions
Convert between newton meters, pound-feet, kilogram-force meters, and other torque units for mechanical engineering.
Electric Charge
182 available conversions
Convert between coulombs, millicoulombs, ampere-hours, faradays, and other electric charge units.
Electric Current
90 available conversions
Convert between amperes, milliamperes, microamperes, biots, and other electric current units.
Electric Potential
72 available conversions
Convert between volts, millivolts, kilovolts, and other electric potential units.
Resistance
56 available conversions
Convert between ohms, kiloohms, megaohms, and other electrical resistance units.
Conductance
56 available conversions
Convert between siemens, millisiemens, microsiemens, and other electrical conductance units.
Capacitance
42 available conversions
Convert between farads, microfarads, picofarads, and other capacitance units.
Inductance
42 available conversions
Convert between henries, millihenries, microhenries, and other inductance units.
Electric Field Strength
42 available conversions
Convert between volts per meter, kilovolts per meter, and other electric field strength units.
Dynamic Viscosity
210 available conversions
Convert between pascal-seconds, poise, centipoise, and other dynamic viscosity units.
Kinematic Viscosity
42 available conversions
Convert between square meters per second, stokes, centistokes, and other kinematic viscosity units.
Flow
552 available conversions
Convert between cubic meters per second, liters per minute, gallons per minute, and other flow rate units.
Magnetic Flux
30 available conversions
Convert between webers, maxwells, volt-seconds, and other magnetic flux units.
Magnetic Flux Density
42 available conversions
Convert between tesla, gauss, webers per square meter, and other magnetic flux density units.
Numbers
0 available conversions
Convert between number bases including binary, octal, decimal, and hexadecimal for computing and digital electronics.
Angular Velocity
56 available conversions
Convert between RPM, radians per second, degrees per second, and other angular velocity units.
Angular Acceleration
12 available conversions
Convert between rad/s², deg/s², rev/s², and RPM per second for rotational motion.
Thermal Expansion
6 available conversions
Convert between per Celsius, per Fahrenheit, and per Kelvin for linear thermal expansion coefficients.
Thermal Resistance
2 available conversions
Convert between K/W and °C/W for thermal resistance in heat transfer analysis.
Thermal Conductivity
2 available conversions
Convert between W/(m·K), BTU/(h·ft·°F) and other thermal conductivity units.
Specific Heat Capacity
6 available conversions
Convert between J/(kg·K), cal/(g·°C), BTU/(lb·°F) for specific heat measurements.
Heat Density
30 available conversions
Convert between J/m², kJ/m², BTU/ft², cal/cm² and other heat density units.
Heat Flux Density
156 available conversions
Convert between W/m², BTU/(h·ft²), BTU/(h·in²), cal/(s·cm²) and other heat flux density units.
Heat Transfer Coefficient
0 available conversions
Convert between W/(m²·K) and other heat transfer coefficient units.
Linear Charge Density
2 available conversions
Convert between C/m, abcoulomb/m for linear charge density measurements.
Surface Charge Density
2 available conversions
Convert between C/m², abcoulomb/m² for surface charge density.
Volume Charge Density
2 available conversions
Convert between C/m³, abcoulomb/m³ for volume charge density.
Linear Current Density
2 available conversions
Convert between A/m, A/cm for linear current density.
Surface Current Density
2 available conversions
Convert between A/m², A/cm² for surface current density.
Electric Resistivity
2 available conversions
Convert between Ω·m, abΩ·m for electric resistivity.
Electric Conductivity
2 available conversions
Convert between S/m, abS/m for electric conductivity.
Luminance
12 available conversions
Convert between cd/m², nit, stilb, lambert for luminance measurements.
Luminous Intensity
6 available conversions
Convert between candela, carcel, hefner for luminous intensity.
Illumination
6 available conversions
Convert between lux, foot-candle, phot for illumination levels.
Radiation Activity
6 available conversions
Convert between becquerel, curie, rutherford for radioactive decay.
Radiation Exposure
2 available conversions
Convert between C/kg, roentgen for radiation exposure.
Radiation Absorbed Dose
2 available conversions
Convert between gray, rad for absorbed radiation dose.
Mass Flow Rate
20 available conversions
Convert between kg/s, lb/h, ton/h for mass flow rate measurements.
Molar Flow Rate
6 available conversions
Convert between mol/s, mol/min, mmol/min for molar flow rate.
Mass Flux Density
2 available conversions
Convert between kg/(m²·s), lb/(ft²·s) for mass flux density.
Molar Concentration
2 available conversions
Convert between mol/m³, mol/L for molar concentration.
Solution Concentration
6 available conversions
Convert between mg/L, ppm, ppb for solution concentration.
Surface Tension
6 available conversions
Convert between N/m, mN/m, dyn/cm for surface tension measurements.
Permeability
2 available conversions
Convert between m², Darcy for permeability in fluid mechanics.
Magnetomotive Force
2 available conversions
Convert between ampere-turn and gilbert for magnetomotive force.
Magnetic Field Strength
2 available conversions
Convert between A/m, Oe for magnetic field strength.
Fuel Efficiency-Mass
2 available conversions
Convert between kg/kWh, lb/(hp·h) for mass-based fuel efficiency.
Fuel Efficiency-Volume
2 available conversions
Convert between L/kWh, gal/(hp·h) for volume-based fuel efficiency.
Specific Volume
2 available conversions
Convert between m³/kg, ft³/lb for specific volume.
Moment of Inertia
2 available conversions
Convert between kg·m², lb·ft² for moment of inertia.
Moment of Force
56 available conversions
Convert between newton meter, ton-force meter, kilogram-force meter for moment of force calculations.
Radiation
462 available conversions
Convert between gray/second, exagray/second and other radiation dose rate units.
Lumber Volume
6 available conversions
Convert between board foot, cubic foot, cord for lumber volume.
Typography
90 available conversions
Convert between typographic units including twips, picas, points, and character measurements.
Frequency Wavelength
50 available conversions
Convert between frequency in hertz and wavelength in meters using the speed of light.
Temperature Interval
12 available conversions
Convert temperature interval or difference between degrees Celsius, Fahrenheit, Kelvin, and Rankine.
Prefixes
380 available conversions
Convert between SI prefixes for any base unit from yocto to yotta.