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The most comprehensive unit converter with scientific calculator, color tools, and more. Fast, accurate, and designed for professionals.
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Popular Converters
Length
Meters, feet, inches, miles, and more
Weight and Mass
Kilograms, pounds, ounces, tons
Currency
USD, EUR, GBP, and 100+ currencies
Volume
Liters, gallons, cups, milliliters
Temperature
Celsius, Fahrenheit, Kelvin
Area
Square meters, acres, hectares
Time
Seconds, minutes, hours, days, years
Pressure
Pascal, PSI, Bar, Torr, Atmosphere
Energy
Joule, Calorie, BTU, Watt-hour, Kilowatt-hour
All Unit Converters
Common Converters
Length
Meters, feet, inches, miles, and more
Weight and Mass
Kilograms, pounds, ounces, tons
Currency
USD, EUR, GBP, and 100+ currencies
Volume
Liters, gallons, cups, milliliters
Temperature
Celsius, Fahrenheit, Kelvin
Area
Square meters, acres, hectares
Pressure
Pascal, PSI, Bar, Torr, Atmosphere
Energy
Joule, Calorie, BTU, Watt-hour, Kilowatt-hour
Power
Watt, horsepower, BTU/hour, kilowatt
Volume - Dry
Bushels, pecks, dry gallons, biblical measures
Force
Newtons, pounds-force, kilograms-force, and more
Numbers
Binary, decimal, hexadecimal, and all bases 2-36
Case Converter
Uppercase, lowercase, sentence case, title case
Angle
Degrees, radians, grads, minutes, seconds
Time
Seconds, minutes, hours, days, years
Speed
Meter per second, km/h, mph, knots, Mach
Data Storage
Bytes, KB, MB, GB, TB, floppy disks, CDs, DVDs
Fuel Consumption
MPG, L/100km, km/L, nautical miles
Engineering Converters
Velocity - Angular
Radians per second, RPM, degrees per second
Acceleration
m/s², ft/s², gravity, gal, and more
Acceleration - Angular
rad/s², rev/s², RPM/s, and more
Density
kg/m³, g/cm³, lb/ft³, and more
Specific Volume
m³/kg, cm³/g, L/kg, ft³/lb, and more
Moment of Inertia
kg·m², kg·cm², lb·ft², oz·in², and more
Moment of Force
N·m, kN·m, lbf·ft, kgf·m, and more
Torque
N·m, kN·m, lbf·ft, kgf·m, and more
Heat Converters
Fuel Efficiency - Mass
J/kg, kJ/kg, cal/g, BTU/lb, and more
Fuel Efficiency - Volume
J/m³, J/L, MJ/m³, BTU/ft³, and more
Temperature Interval
K, °C, °F, °R, °r temperature differences
Thermal Expansion
1/K, °C⁻¹, °F⁻¹, °R⁻¹, °r⁻¹ coefficients
Thermal Resistance
K/W, °F·h/Btu, °F·s/Btu resistance units
Thermal Conductivity
W/(m·K), kW/(m·K), cal/(s·cm·°C), Btu·in/(s·ft²·°F)
Specific Heat Capacity
J/(kg·K), cal/(g·°C), Btu/(lb·°F) heat capacity units
Heat Density
J/m², cal/cm², Btu/ft², Langley heat density units
Heat Flux Density
W/m², kW/m², cal/(s·cm²), Btu/(s·ft²) heat flux units
Heat Transfer Coefficient
W/(m²·K), cal/(s·cm²·°C), Btu/(h·ft²·°F) heat transfer units
Fluids Converters
Flow
m³/s, L/s, gal/min, ft³/min flow units
Flow - Mass
kg/s, g/s, lb/s, t/h mass flow units
Flow - Molar
mol/s, kmol/s, mmol/s, µmol/s molar flow units
Mass Flux Density
Convert mass flow rate per unit area units
Concentration - Molar
Convert molar concentration units
Concentration - Solution
Convert mass concentration units
Viscosity - Dynamic
Convert dynamic viscosity units
Viscosity - Kinematic
Convert kinematic viscosity units
Surface Tension
Convert surface tension units
Permeability
Convert permeability units
Light Converters
Luminance
Convert luminance units
Luminous Intensity
Convert luminous intensity units
Illumination
Convert illuminance units
Digital Image Resolution
Convert digital image resolution units
Frequency Wavelength
Convert frequency and wavelength units
Electricity Converters
Charge
Coulombs, ampere-hours, and elementary charge
Linear Charge Density
Coulomb per meter, centimeter, and inch
Surface Charge Density
Coulomb per square meter, centimeter, and inch
Volume Charge Density
Coulomb per cubic meter, centimeter, and inch
Current
Ampere, milliampere, kiloampere, and CGS units
Linear Current Density
Ampere per meter, centimeter, inch, and CGS units
Surface Current Density
Ampere per square meter, centimeter, inch, and specialized units
Electric Field Strength
Volt per meter, kilovolt per meter, and specialized units
Electric Potential
Volt, watt per ampere, statvolt, abvolt, and specialized units
Electric Resistance
Ohm, megohm, microhm, volt per ampere, and specialized units
Electric Resistivity
Ohm meter, ohm centimeter, microhm centimeter, and specialized units
Electric Conductance
Siemens, megasiemens, millisiemens, mho, and specialized units
Electric Conductivity
Siemens per meter, mho per meter, abmho per meter, and specialized units
Electrostatic Capacitance
Electrical capacitance measurements
Inductance
Electrical inductance measurements
Magnetism Converters
Radiology Converters
Other Converters
Prefixes
Metric prefixes for large and small numbers
Data Transfer
Data transfer rates and network speeds
Sound
Bel, decibel, and neper units for sound level measurements
Typography
Typography and font measurements
Volume - Lumber
Lumber and wood volume measurements