Quantity library
Explore the physical quantities with working converters. Each quantity has a shared base unit and its own set of compatible units.
Length converter
Convert metric and imperial distances, including metres, feet, inches and miles.
m · km · cm · mm · in · ft · yd · mi · nmi · µm · nm · ly · pc
Area converter
Convert areas for land, floors and surfaces between metric and imperial units.
m² · ft² · ha · ac · cm² · in² · km² · mi² · mm² · yd²
Volume converter
Convert liquid and solid volumes. Gallons here are US liquid gallons.
m³ · L · mL · US gal · ft³ · cm³ · in³ · yd³ · imp gal · US cup · US pt · US qt · US tbsp · US tsp
Mass converter
Convert kilograms, grams, pounds and ounces using international avoirdupois definitions.
kg · g · lb · oz · mg · t · US ton · st · ct
Time converter
Convert durations between seconds, minutes, hours and fixed 24-hour days.
s · min · h · d · wk · ms · µs · ns
Temperature converter
Convert Celsius, Fahrenheit and Kelvin with the correct offsets, not just a scale factor.
K · °C · °F · °R
Speed converter
Convert speed between metres per second, kilometres per hour and miles per hour.
m/s · km/h · mph · ft/s · km/s · kn · c
Pressure converter
Convert pressure readings between pascals, kilopascals, bars and pounds per square inch.
Pa · kPa · bar · psi · atm · MPa · mbar · mmHg (0 °C) · inHg (0 °C) · Torr · µPa · mPa · GPa
Energy converter
Convert joules, kilojoules, kilowatt-hours and thermochemical calories.
J · kJ · kWh · cal · BTU IT · eV · ft·lbf · kcal th · MJ · Wh · nJ · µJ · mJ · GJ · TJ · pJ · fJ
Power converter
Convert power ratings between watts, kilowatts and megawatts.
W · kW · MW · BTU IT/h · hp mech · hp metric · PS · TR · nW · µW · mW · GW · TW · pW
Data size converter
Convert bits and bytes with an explicit distinction between decimal and binary prefixes.
B · kB · MB · KiB · MiB · bit · GB · TB · GiB · TiB
Fuel economy converter
Convert fuel consumption in litres per 100 kilometres to miles per US gallon.
L/100 km · US mpg · km/L · mi/L · imp mpg
Force converter
Convert force measurements across 13 units. Choose your source and target units and calculate in your browser.
N · kN · dyn · kgf · lbf · kip · pdl · US tonf · mN · µN · MN · nN · pN
Torque converter
Convert torque measurements across 7 units. Choose your source and target units and calculate in your browser.
N·m · kN·m · N·cm · kgf·m · lbf·ft · lbf·in · ozf·in
Angle converter
Convert angle measurements across 6 units. Choose your source and target units and calculate in your browser.
rad · ° · gon · rev · ′ · ″
Data rate converter
Convert data rate measurements across 8 units. Choose your source and target units and calculate in your browser.
bit/s · kbit/s · Mbit/s · Gbit/s · B/s · kB/s · MB/s · GB/s
Frequency converter
Convert frequency measurements across 8 units. Choose your source and target units and calculate in your browser.
Hz · kHz · MHz · GHz · rpm · bpm · rad/s · THz
Density converter
Convert density measurements across 6 units. Choose your source and target units and calculate in your browser.
kg/m³ · kg/L · g/mL · g/cm³ · lb/ft³ · lb/US gal
Volumetric flow converter
Convert flow rate measurements across 10 units. Choose your source and target units and calculate in your browser.
m³/s · m³/h · L/s · L/min · L/h · ft³/s · ft³/min · US gal/min · imp gal/min · bbl/d
Acceleration converter
Convert acceleration measurements across 5 units. Choose your source and target units and calculate in your browser.
m/s² · cm/s² · ft/s² · g₀ · Gal
Electric current converter
Convert electric current across supported units. Compare equivalent values using the stated physical definitions.
A · mA · µA · nA · kA · pA · fA
Voltage converter
Convert voltage across supported units. Compare equivalent values using the stated physical definitions.
V · mV · µV · kV · MV · nV · pV
Electrical resistance converter
Convert electrical resistance across supported units. Compare equivalent values using the stated physical definitions.
Ω · mΩ · µΩ · kΩ · MΩ · GΩ · TΩ
Electrical conductance converter
Convert electrical conductance across supported units. Compare equivalent values using the stated physical definitions.
S · mS · µS · nS · pS · kS
Electrical conductivity converter
Convert electrical conductivity across supported units. Compare equivalent values using the stated physical definitions.
S/m · mS/m · µS/m · S/cm · mS/cm · µS/cm
Capacitance converter
Convert capacitance across supported units. Compare equivalent values using the stated physical definitions.
F · mF · µF · nF · pF · fF
Inductance converter
Convert inductance across supported units. Compare equivalent values using the stated physical definitions.
H · mH · µH · nH · pH
Electric charge converter
Convert electric charge across supported units. Compare equivalent values using the stated physical definitions.
C · mC · µC · nC · Ah · mAh · pC · kC · fC
Electric field strength converter
Convert electric field strength across supported units. Compare equivalent values using the stated physical definitions.
V/m · V/cm · kV/m · kV/cm · mV/m
Electrical resistivity converter
Convert electrical resistivity across supported units. Compare equivalent values using the stated physical definitions.
Ω·m · Ω·cm · µΩ·m · µΩ·cm · Ω·mm²/m
Magnetic flux converter
Convert magnetic flux across supported units. Compare equivalent values using the stated physical definitions.
Wb · mWb · µWb · nWb · Mx · pWb
Magnetic flux density converter
Convert magnetic flux density across supported units. Compare equivalent values using the stated physical definitions.
T · mT · µT · nT · G · mG · pT
Magnetic field strength converter
Convert magnetic field strength across supported units. Compare equivalent values using the stated physical definitions.
A/m · kA/m · A/cm · Oe
Dynamic viscosity converter
Convert dynamic viscosity across supported units. Compare equivalent values using the stated physical definitions.
Pa·s · mPa·s · P · cP · µPa·s
Kinematic viscosity converter
Convert kinematic viscosity across supported units. Compare equivalent values using the stated physical definitions.
m²/s · mm²/s · St · cSt · ft²/s
Mass flow rate converter
Convert mass flow rate across supported units. Compare equivalent values using the stated physical definitions.
kg/s · kg/h · g/s · g/min · lb/s · lb/h
Absorbed radiation dose converter
Convert absorbed radiation dose across supported units. Compare equivalent values using the stated physical definitions.
Gy · mGy · µGy · rad · kGy · nGy
Equivalent radiation dose converter
Convert equivalent radiation dose across supported units. Compare equivalent values using the stated physical definitions.
Sv · mSv · µSv · rem · mrem · nSv
Radionuclide activity converter
Convert radionuclide activity across supported units. Compare equivalent values using the stated physical definitions.
Bq · kBq · MBq · GBq · Ci · mCi · µCi · nCi · TBq
Absorbed radiation dose rate converter
Convert absorbed radiation dose rate across supported units. Compare equivalent values using the stated physical definitions.
Gy/s · Gy/h · mGy/h · µGy/h · rad/h
Heat capacity converter
Convert heat capacity across supported units. Compare equivalent values using the stated physical definitions.
J/K · kJ/K · cal th/K · kcal th/K · BTU IT/°F
Specific heat capacity converter
Convert specific heat capacity across supported units. Compare equivalent values using the stated physical definitions.
J/(kg·K) · kJ/(kg·K) · J/(g·K) · cal th/(g·°C) · BTU IT/(lb·°F)
Thermal conductivity converter
Convert thermal conductivity across supported units. Compare equivalent values using the stated physical definitions.
W/(m·K) · mW/(m·K) · W/(cm·K) · cal th/(cm·s·°C)
Thermal resistance converter
Convert thermal resistance across supported units. Compare equivalent values using the stated physical definitions.
K/W · K/kW · °C/W · °F/W
Thermal insulance (R-value) converter
Convert thermal insulance (r-value) across supported units. Compare equivalent values using the stated physical definitions.
m²·K/W · clo
Thermal diffusivity converter
Convert thermal diffusivity across supported units. Compare equivalent values using the stated physical definitions.
m²/s · mm²/s · cm²/s · ft²/h
Heat flux density converter
Convert heat flux density across supported units. Compare equivalent values using the stated physical definitions.
W/m² · kW/m² · W/cm² · mW/cm² · erg/(cm²·s)
Surface tension converter
Convert surface tension across supported units. Compare equivalent values using the stated physical definitions.
N/m · mN/m · dyn/cm · N/cm
Spectroscopic wavenumber converter
Convert spectroscopic wavenumber across supported units. Compare equivalent values using the stated physical definitions.
m⁻¹ · cm⁻¹ · mm⁻¹ · µm⁻¹
Specific energy converter
Convert specific energy across supported units. Compare equivalent values using the stated physical definitions.
J/kg · kJ/kg · MJ/kg · J/g · Wh/kg · kWh/kg
Volumetric energy density converter
Convert volumetric energy density across supported units. Compare equivalent values using the stated physical definitions.
J/m³ · kJ/m³ · MJ/m³ · J/L · Wh/L · kWh/m³
Photon radiation exposure converter
Convert photon radiation exposure across supported units. Compare equivalent values using the stated physical definitions.
C/kg · mC/kg · µC/kg · R · mR