{"categories":[{"id":"second_moment_area","name":"Second Moment of Area","mode":"multiplicative","units":[{"id":"m4","name":"Metres to the fourth power","symbol":"m⁴"},{"id":"mm4","name":"Millimetres to the fourth power","symbol":"mm⁴"},{"id":"cm4","name":"Centimetres to the fourth power","symbol":"cm⁴"},{"id":"in4","name":"Inches to the fourth power","symbol":"in⁴"},{"id":"ft4","name":"Feet to the fourth power","symbol":"ft⁴"}],"note":"Area inertia has length to the fourth power. These units also describe polar area moment, but not mass inertia (kg·m²).","calculator":{"href":"/calculators/rectangular-section","title":"Calculate rectangular section properties"},"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"section_modulus","name":"Section Modulus","mode":"multiplicative","units":[{"id":"m3","name":"Cubic metres","symbol":"m³"},{"id":"mm3","name":"Cubic millimetres","symbol":"mm³"},{"id":"cm3","name":"Cubic centimetres","symbol":"cm³"},{"id":"in3","name":"Cubic inches","symbol":"in³"},{"id":"ft3","name":"Cubic feet","symbol":"ft³"}],"note":"Elastic section modulus I/c has length cubed; it is not a material volume. Conversion does not select a bending axis or calculate a plastic section modulus.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"thermal_conductivity","name":"Thermal Conductivity","mode":"multiplicative","units":[{"id":"W_m_K","name":"Watts per metre kelvin","symbol":"W/(m·K)"},{"id":"W_m_C","name":"Watts per metre Celsius difference","symbol":"W/(m·°C)"},{"id":"mW_m_K","name":"Milliwatts per metre kelvin","symbol":"mW/(m·K)"},{"id":"Btu_hr_ft_F","name":"Btu (IT) per hour foot Fahrenheit difference","symbol":"Btu/(h·ft·°F)"},{"id":"Btu_in_hr_ft2_F","name":"Btu (IT) inch per hour square foot Fahrenheit difference","symbol":"Btu·in/(h·ft²·°F)"}],"note":"Conductivity k is not a heat-transfer coefficient. Temperature units here represent differences, with no offset. Btu means International Table Btu.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"},{"title":"NIST SP 811 footnote 9: International Table Btu and calorie definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-footnotes","accessed":"2026-09-08"}]},{"id":"heat_transfer_coefficient","name":"Heat-transfer Coefficient","mode":"multiplicative","units":[{"id":"W_m2_K","name":"Watts per square metre kelvin","symbol":"W/(m²·K)"},{"id":"W_m2_C","name":"Watts per square metre Celsius difference","symbol":"W/(m²·°C)"},{"id":"kW_m2_K","name":"Kilowatts per square metre kelvin","symbol":"kW/(m²·K)"},{"id":"Btu_hr_ft2_F","name":"Btu (IT) per hour square foot Fahrenheit difference","symbol":"Btu/(h·ft²·°F)"}],"note":"Converts units of a specified coefficient h or U; does not calculate it from flow or geometry. Temperature units are differences. Btu means International Table Btu.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"},{"title":"NIST SP 811 footnote 9: International Table Btu and calorie definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-footnotes","accessed":"2026-09-08"}]},{"id":"heat_capacity","name":"Heat Capacity","mode":"multiplicative","units":[{"id":"J_K","name":"Joules per kelvin","symbol":"J/K"},{"id":"kJ_K","name":"Kilojoules per kelvin","symbol":"kJ/K"},{"id":"Btu_F","name":"Btu (IT) per Fahrenheit difference","symbol":"Btu/°F"},{"id":"cal_th_K","name":"Thermochemical calories per kelvin","symbol":"cal(th)/K"}],"note":"Total heat capacity has units of energy per temperature difference. For a value per unit mass, choose Specific Heat Capacity. No temperature offset is used.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"},{"title":"NIST SP 811 footnote 9: International Table Btu and calorie definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-footnotes","accessed":"2026-09-08"}]},{"id":"specific_heat","name":"Specific Heat Capacity","mode":"multiplicative","units":[{"id":"J_kg_K","name":"Joules per kilogram kelvin","symbol":"J/(kg·K)"},{"id":"kJ_kg_K","name":"Kilojoules per kilogram kelvin","symbol":"kJ/(kg·K)"},{"id":"J_g_K","name":"Joules per gram kelvin","symbol":"J/(g·K)"},{"id":"Btu_lb_F","name":"Btu (IT) per pound Fahrenheit difference","symbol":"Btu/(lb·°F)"},{"id":"cal_th_g_K","name":"Thermochemical calories per gram kelvin","symbol":"cal(th)/(g·K)"},{"id":"cal_IT_g_K","name":"International Table calories per gram kelvin","symbol":"cal(IT)/(g·K)"}],"note":"Mass-specific heat capacity uses temperature differences. This conversion does not change constant-pressure heat capacity into constant-volume heat capacity, or account for temperature dependence.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"},{"title":"NIST SP 811 footnote 9: International Table Btu and calorie definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-footnotes","accessed":"2026-09-08"}]},{"id":"angle","name":"Plane Angle","mode":"multiplicative","units":[{"id":"radian","name":"Radians","symbol":"rad"},{"id":"degree","name":"Degrees of angle","symbol":"°"},{"id":"revolution","name":"Revolutions","symbol":"rev"},{"id":"gon","name":"Gons","symbol":"gon"},{"id":"arcminute","name":"Arcminutes","symbol":"arcmin"},{"id":"arcsecond","name":"Arcseconds","symbol":"arcsec"}],"note":"Signed angles are scaled without wrapping to one revolution. Degrees here describe angle, not temperature; radians here are not the absorbed-dose unit rad.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"angular_speed","name":"Angular Speed","mode":"multiplicative","units":[{"id":"rad_s","name":"Radians per second","symbol":"rad/s"},{"id":"degree_s","name":"Degrees per second","symbol":"°/s"},{"id":"rev_s","name":"Revolutions per second","symbol":"rev/s"},{"id":"angular_rpm","name":"Revolutions per minute","symbol":"rpm"}],"note":"Angular speed ω is in rad/s; cyclic frequency f is in cycles/s (Hz). For one revolution per cycle, ω = 2πf. This does not calculate tangential speed, which also requires a radius.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"area","name":"Area","mode":"multiplicative","units":[{"id":"m2","name":"Square metres","symbol":"m²"},{"id":"mm2","name":"Square millimetres","symbol":"mm²"},{"id":"cm2","name":"Square centimetres","symbol":"cm²"},{"id":"ft2","name":"Square international feet","symbol":"ft²"},{"id":"in2","name":"Square inches","symbol":"in²"},{"id":"hectare","name":"Hectares","symbol":"ha"}],"note":"Square foot and square inch use the international foot. Area factors square the length factor.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"volume","name":"Volume","mode":"multiplicative","units":[{"id":"m3","name":"Cubic metres","symbol":"m³"},{"id":"L","name":"Litres","symbol":"L"},{"id":"mL","name":"Millilitres","symbol":"mL"},{"id":"cm3","name":"Cubic centimetres","symbol":"cm³"},{"id":"ft3","name":"Cubic international feet","symbol":"ft³"},{"id":"in3","name":"Cubic inches","symbol":"in³"},{"id":"gal_us","name":"Gallons (US liquid)","symbol":"US gal"},{"id":"gal_imp","name":"Gallons (imperial)","symbol":"imp gal"}],"note":"US liquid and imperial gallons differ. Dry measures are not included. These are volumes, not gas volumes normalized to reference conditions.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"},{"title":"NIST Handbook 44, Appendix C: liquid gallon equals 231 cubic inches","url":"https://www.nist.gov/system/files/documents/2017/05/09/HB44-07-FullDoc-Rev1-LC.pdf#page=311","accessed":"2026-09-08"}]},{"id":"dynamic_viscosity","name":"Dynamic Viscosity","mode":"multiplicative","units":[{"id":"Pa_s","name":"Pascal seconds","symbol":"Pa·s"},{"id":"mPa_s","name":"Millipascal seconds","symbol":"mPa·s"},{"id":"poise","name":"Poise","symbol":"P"},{"id":"cP","name":"Centipoise","symbol":"cP"},{"id":"lb_ft_s","name":"Pound mass per foot second","symbol":"lb/(ft·s)"}],"note":"Dynamic viscosity μ is separate from kinematic viscosity ν. Converting between them requires density: ν = μ/ρ.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"kinematic_viscosity","name":"Kinematic Viscosity","mode":"multiplicative","units":[{"id":"m2_s","name":"Square metres per second","symbol":"m²/s"},{"id":"mm2_s","name":"Square millimetres per second","symbol":"mm²/s"},{"id":"stokes","name":"Stokes","symbol":"St"},{"id":"cSt","name":"Centistokes","symbol":"cSt"},{"id":"ft2_s","name":"Square feet per second","symbol":"ft²/s"}],"note":"Kinematic viscosity ν is separate from dynamic viscosity μ. A centistokes is a square millimetre per second, not a centipoise.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"length","name":"Length","mode":"multiplicative","units":[{"id":"m","name":"Meters","symbol":"m"},{"id":"ft","name":"Feet","symbol":"ft"},{"id":"in","name":"Inches","symbol":"in"},{"id":"mi","name":"Miles","symbol":"mi"},{"id":"yd","name":"Yards","symbol":"yd"},{"id":"nmi","name":"Nautical Miles","symbol":"nmi"},{"id":"angstrom","name":"Angstroms","symbol":"Å"},{"id":"micron","name":"Microns","symbol":"μm"},{"id":"ly","name":"Light-years","symbol":"ly"},{"id":"pc","name":"Parsecs","symbol":"pc"},{"id":"furlong","name":"Furlongs","symbol":"fur"},{"id":"cubit","name":"Cubits (assumed 18 inches)","symbol":"cubit"},{"id":"mm","name":"Millimeters","symbol":"mm"},{"id":"cm","name":"Centimeters","symbol":"cm"},{"id":"km","name":"Kilometers","symbol":"km"}],"note":null,"calculator":null,"sources":[]},{"id":"mass","name":"Mass","mode":"multiplicative","units":[{"id":"kg","name":"Kilograms","symbol":"kg"},{"id":"lb","name":"Pounds","symbol":"lb"},{"id":"oz","name":"Ounces","symbol":"oz"},{"id":"g","name":"Grams","symbol":"g"},{"id":"tonne","name":"Tonnes (Metric Tons)","symbol":"t"},{"id":"ton_us","name":"Tons (US)","symbol":"ton"},{"id":"stone","name":"Stone","symbol":"st"},{"id":"slug","name":"Slugs","symbol":"slug"},{"id":"carat","name":"Carats","symbol":"ct"},{"id":"mg","name":"Milligrams","symbol":"mg"}],"note":null,"calculator":null,"sources":[]},{"id":"time","name":"Time","mode":"multiplicative","units":[{"id":"s","name":"Seconds","symbol":"s"},{"id":"min","name":"Minutes","symbol":"min"},{"id":"hr","name":"Hours","symbol":"hr"},{"id":"day","name":"Days","symbol":"day"},{"id":"week","name":"Weeks","symbol":"week"},{"id":"year","name":"Julian years (365.25 days)","symbol":"yr"},{"id":"ms","name":"Milliseconds","symbol":"ms"},{"id":"sidereal_day","name":"Sidereal Days","symbol":"sid day"},{"id":"fortnight","name":"Fortnights","symbol":"fortnight"},{"id":"us","name":"Microseconds","symbol":"μs"},{"id":"ns","name":"Nanoseconds","symbol":"ns"}],"note":null,"calculator":null,"sources":[]},{"id":"temperature","name":"Temperature","mode":"temperature-point","units":[{"id":"celsius","name":"Celsius","symbol":"°C"},{"id":"fahrenheit","name":"Fahrenheit","symbol":"°F"},{"id":"kelvin","name":"Kelvin","symbol":"K"},{"id":"rankine","name":"Rankine","symbol":"°R"},{"id":"delisle","name":"Delisle","symbol":"°De"}],"note":"Temperature points include offsets. For a rise or drop, choose Temperature Difference instead. The converter performs scale arithmetic, not a physical-state assessment.","calculator":null,"sources":[]},{"id":"force","name":"Force","mode":"multiplicative","units":[{"id":"N","name":"Newtons","symbol":"N"},{"id":"lbf","name":"Pounds-force","symbol":"lbf"},{"id":"kgf","name":"Kilograms-force","symbol":"kgf"},{"id":"dyne","name":"Dynes","symbol":"dyn"},{"id":"poundal","name":"Poundals","symbol":"pdl"},{"id":"kN","name":"Kilonewtons","symbol":"kN"},{"id":"MN","name":"Meganewtons","symbol":"MN"}],"note":null,"calculator":null,"sources":[]},{"id":"pressure","name":"Pressure & Stress","mode":"multiplicative","units":[{"id":"Pa","name":"Pascals","symbol":"Pa"},{"id":"psi","name":"Pounds per square inch","symbol":"psi"},{"id":"bar","name":"Bar","symbol":"bar"},{"id":"atm","name":"Atmospheres","symbol":"atm"},{"id":"torr","name":"Torr","symbol":"Torr"},{"id":"inHg","name":"Inches of Mercury (conventional)","symbol":"inHg"},{"id":"mmHg","name":"Millimeters of Mercury (conventional)","symbol":"mmHg"},{"id":"kPa","name":"Kilopascals","symbol":"kPa"},{"id":"MPa","name":"Megapascals","symbol":"MPa"},{"id":"GPa","name":"Gigapascals","symbol":"GPa"}],"note":"Unit scaling preserves the pressure reference. It does not convert gauge pressure to absolute pressure; that requires the local atmospheric pressure. Mercury units use conventional definitions.","calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"},{"title":"OIML D 2: units of measurement, torr definition","url":"https://www.oiml.org/en/publications/documents/en/files/pdf_d/d002-e07.pdf","accessed":"2026-09-08"}]},{"id":"energy","name":"Energy, Work & Heat","mode":"multiplicative","units":[{"id":"J","name":"Joules","symbol":"J"},{"id":"cal","name":"Calories (thermochemical)","symbol":"cal"},{"id":"Cal","name":"Calories (nutritional)","symbol":"Cal"},{"id":"BTU","name":"British Thermal Units (International Table)","symbol":"BTU"},{"id":"kWh","name":"Kilowatt-hours","symbol":"kWh"},{"id":"eV","name":"Electronvolts","symbol":"eV"},{"id":"ft_lbf","name":"Foot-pounds","symbol":"ft·lbf"},{"id":"erg","name":"Ergs","symbol":"erg"},{"id":"kJ","name":"Kilojoules","symbol":"kJ"},{"id":"MJ","name":"Megajoules","symbol":"MJ"},{"id":"Wh","name":"Watt-hours","symbol":"Wh"}],"note":null,"calculator":null,"sources":[]},{"id":"power","name":"Power","mode":"multiplicative","units":[{"id":"W","name":"Watts","symbol":"W"},{"id":"hp_mech","name":"Horsepower (mechanical)","symbol":"hp"},{"id":"hp_metric","name":"Horsepower (metric)","symbol":"PS"},{"id":"ft_lbf_min","name":"Foot-pounds per minute","symbol":"ft·lbf/min"},{"id":"BTU_hr","name":"BTUs per hour (International Table)","symbol":"BTU/hr"},{"id":"kW","name":"Kilowatts","symbol":"kW"},{"id":"MW","name":"Megawatts","symbol":"MW"}],"note":null,"calculator":null,"sources":[]},{"id":"density","name":"Density","mode":"multiplicative","units":[{"id":"kg_m3","name":"Kilograms per cubic meter","symbol":"kg/m³"},{"id":"lb_ft3","name":"Pounds per cubic foot","symbol":"lb/ft³"},{"id":"g_cm3","name":"Grams per cubic centimeter","symbol":"g/cm³"},{"id":"kg_L","name":"Kilograms per liter","symbol":"kg/L"},{"id":"g_mL","name":"Grams per milliliter","symbol":"g/mL"},{"id":"lb_gal","name":"Pounds per gallon (US)","symbol":"lb/gal"}],"note":null,"calculator":null,"sources":[]},{"id":"velocity","name":"Velocity & Speed","mode":"multiplicative","units":[{"id":"m_s","name":"Meters per second","symbol":"m/s"},{"id":"mph","name":"Miles per hour","symbol":"mph"},{"id":"kph","name":"Kilometers per hour","symbol":"km/h"},{"id":"knot","name":"Knots","symbol":"kn"},{"id":"fps","name":"Feet per second","symbol":"ft/s"},{"id":"km_s","name":"Kilometers per second","symbol":"km/s"},{"id":"c","name":"Speed of light","symbol":"c"}],"note":"Mach is a ratio to the local speed of sound, not a fixed speed unit. Use the gas-state calculator with gas properties and temperature.","calculator":{"href":"/calculators/gas-flow-state","title":"Calculate speed of sound and Mach"},"sources":[]},{"id":"flow_volumetric","name":"Volumetric Flow Rate","mode":"multiplicative","units":[{"id":"m3_s","name":"Cubic meters per second","symbol":"m³/s"},{"id":"gpm_imp","name":"Gallons per minute (imperial)","symbol":"imp gal/min"},{"id":"gpm","name":"Gallons per minute (US liquid)","symbol":"GPM"},{"id":"L_s","name":"Liters per second","symbol":"L/s"},{"id":"L_min","name":"Liters per minute","symbol":"L/min"},{"id":"ft3_s","name":"Cubic feet per second","symbol":"ft³/s"},{"id":"ft3_min","name":"Cubic feet per minute","symbol":"CFM"},{"id":"m3_hr","name":"Cubic meters per hour","symbol":"m³/hr"}],"note":null,"calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"flow_mass","name":"Mass Flow Rate","mode":"multiplicative","units":[{"id":"kg_s","name":"Kilograms per second","symbol":"kg/s"},{"id":"lb_hr","name":"Pounds per hour","symbol":"lb/hr"},{"id":"kg_hr","name":"Kilograms per hour","symbol":"kg/hr"},{"id":"g_s","name":"Grams per second","symbol":"g/s"},{"id":"lb_s","name":"Pounds per second","symbol":"lb/s"},{"id":"t_hr","name":"Tonnes per hour","symbol":"t/hr"}],"note":null,"calculator":null,"sources":[{"title":"NIST SP 811: conversion factors and unit definitions","url":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8","accessed":"2026-09-08"}]},{"id":"torque","name":"Torque","mode":"multiplicative","units":[{"id":"Nm","name":"Newton-meters","symbol":"N·m"},{"id":"ft_lbf_torque","name":"Foot-pounds","symbol":"ft·lbf"},{"id":"in_lbf","name":"Inch-pounds","symbol":"in·lbf"},{"id":"kNm","name":"Kilonewton-meters","symbol":"kN·m"},{"id":"dyne_cm","name":"Dyne-centimeters","symbol":"dyn·cm"}],"note":null,"calculator":null,"sources":[]},{"id":"voltage","name":"Voltage","mode":"multiplicative","units":[{"id":"V","name":"Volts","symbol":"V"},{"id":"mV","name":"Millivolts","symbol":"mV"},{"id":"kV","name":"Kilovolts","symbol":"kV"},{"id":"MV","name":"Megavolts","symbol":"MV"},{"id":"uV","name":"Microvolts","symbol":"μV"}],"note":null,"calculator":null,"sources":[]},{"id":"current","name":"Current","mode":"multiplicative","units":[{"id":"A","name":"Amperes","symbol":"A"},{"id":"mA","name":"Milliamperes","symbol":"mA"},{"id":"kA","name":"Kiloamperes","symbol":"kA"},{"id":"uA","name":"Microamperes","symbol":"μA"},{"id":"nA","name":"Nanoamperes","symbol":"nA"}],"note":null,"calculator":null,"sources":[]},{"id":"resistance","name":"Resistance","mode":"multiplicative","units":[{"id":"ohm","name":"Ohms","symbol":"Ω"},{"id":"mohm","name":"Milliohms","symbol":"mΩ"},{"id":"kohm","name":"Kiloohms","symbol":"kΩ"},{"id":"Mohm","name":"Megohms","symbol":"MΩ"},{"id":"Gohm","name":"Gigohms","symbol":"GΩ"}],"note":null,"calculator":null,"sources":[]},{"id":"capacitance","name":"Capacitance","mode":"multiplicative","units":[{"id":"F","name":"Farads","symbol":"F"},{"id":"mF","name":"Millifarads","symbol":"mF"},{"id":"uF","name":"Microfarads","symbol":"μF"},{"id":"nF","name":"Nanofarads","symbol":"nF"},{"id":"pF","name":"Picofarads","symbol":"pF"}],"note":null,"calculator":null,"sources":[]},{"id":"inductance","name":"Inductance","mode":"multiplicative","units":[{"id":"H","name":"Henries","symbol":"H"},{"id":"mH","name":"Millihenries","symbol":"mH"},{"id":"uH","name":"Microhenries","symbol":"μH"},{"id":"nH","name":"Nanohenries","symbol":"nH"}],"note":null,"calculator":null,"sources":[]},{"id":"charge","name":"Electric Charge","mode":"multiplicative","units":[{"id":"C","name":"Coulombs","symbol":"C"},{"id":"mC","name":"Millicoulombs","symbol":"mC"},{"id":"uC","name":"Microcoulombs","symbol":"μC"},{"id":"nC","name":"Nanocoulombs","symbol":"nC"},{"id":"Ah","name":"Ampere-hours","symbol":"Ah"},{"id":"mAh","name":"Milliampere-hours","symbol":"mAh"}],"note":null,"calculator":null,"sources":[]},{"id":"resistivity","name":"Electrical Resistivity","mode":"multiplicative","units":[{"id":"ohm_m","name":"Ohm-meters","symbol":"Ω·m"},{"id":"ohm_cm","name":"Ohm-centimeters","symbol":"Ω·cm"},{"id":"ohm_mm","name":"Ohm-millimeters","symbol":"Ω·mm"}],"note":null,"calculator":null,"sources":[]},{"id":"conductivity","name":"Electrical Conductivity","mode":"multiplicative","units":[{"id":"S_m","name":"Siemens per meter","symbol":"S/m"},{"id":"mS_m","name":"Millisiemens per meter","symbol":"mS/m"},{"id":"uS_cm","name":"Microsiemens per centimeter","symbol":"μS/cm"}],"note":null,"calculator":null,"sources":[]},{"id":"magnetic_flux","name":"Magnetic Flux","mode":"multiplicative","units":[{"id":"Wb","name":"Webers","symbol":"Wb"},{"id":"mWb","name":"Milliwebers","symbol":"mWb"},{"id":"uWb","name":"Microwebers","symbol":"μWb"},{"id":"maxwell","name":"Maxwells","symbol":"Mx"}],"note":null,"calculator":null,"sources":[]},{"id":"magnetic_flux_density","name":"Magnetic Flux Density","mode":"multiplicative","units":[{"id":"T","name":"Tesla","symbol":"T"},{"id":"mT","name":"Millitesla","symbol":"mT"},{"id":"uT","name":"Microtesla","symbol":"μT"},{"id":"G","name":"Gauss","symbol":"G"}],"note":null,"calculator":null,"sources":[]},{"id":"luminous_flux","name":"Luminous Flux","mode":"multiplicative","units":[{"id":"lm","name":"Lumens","symbol":"lm"},{"id":"klm","name":"Kilolumens","symbol":"klm"}],"note":null,"calculator":null,"sources":[]},{"id":"illuminance","name":"Illuminance","mode":"multiplicative","units":[{"id":"lx","name":"Lux","symbol":"lx"},{"id":"fc","name":"Foot-candles","symbol":"fc"},{"id":"klx","name":"Kilolux","symbol":"klx"}],"note":null,"calculator":null,"sources":[]},{"id":"luminance","name":"Luminance","mode":"multiplicative","units":[{"id":"cd_m2","name":"Candela per square meter","symbol":"cd/m²"},{"id":"nit","name":"Nits","symbol":"nt"},{"id":"fL","name":"Foot-lamberts","symbol":"fL"},{"id":"sb","name":"Stilbs","symbol":"sb"}],"note":null,"calculator":null,"sources":[]},{"id":"wavelength","name":"Wavelength","mode":"multiplicative","units":[{"id":"nm","name":"Nanometers","symbol":"nm"},{"id":"angstrom_wave","name":"Angstroms","symbol":"Å"},{"id":"um","name":"Micrometers","symbol":"μm"},{"id":"mm_wave","name":"Millimeters","symbol":"mm"},{"id":"cm_wave","name":"Centimeters","symbol":"cm"},{"id":"m_wave","name":"Meters","symbol":"m"}],"note":null,"calculator":null,"sources":[]},{"id":"frequency","name":"Frequency","mode":"multiplicative","units":[{"id":"Hz","name":"Hertz","symbol":"Hz"},{"id":"kHz","name":"Kilohertz","symbol":"kHz"},{"id":"MHz","name":"Megahertz","symbol":"MHz"},{"id":"GHz","name":"Gigahertz","symbol":"GHz"},{"id":"THz","name":"Terahertz","symbol":"THz"},{"id":"rpm","name":"Revolutions per minute","symbol":"rpm"}],"note":null,"calculator":null,"sources":[]},{"id":"radiation_dose","name":"Absorbed Radiation Dose","mode":"multiplicative","units":[{"id":"Gy","name":"Gray","symbol":"Gy"},{"id":"rad","name":"Rad","symbol":"rad"},{"id":"mGy","name":"Milligray","symbol":"mGy"}],"note":null,"calculator":null,"sources":[]},{"id":"dose_equivalent","name":"Radiation Dose Equivalent","mode":"multiplicative","units":[{"id":"Sv","name":"Sievert","symbol":"Sv"},{"id":"rem","name":"Rem","symbol":"rem"},{"id":"mSv","name":"Millisievert","symbol":"mSv"}],"note":null,"calculator":null,"sources":[]},{"id":"temperature_difference","name":"Temperature Difference","mode":"multiplicative","units":[{"id":"delta_celsius","name":"Celsius difference","symbol":"Δ°C"},{"id":"delta_kelvin","name":"Kelvin difference","symbol":"ΔK"},{"id":"delta_fahrenheit","name":"Fahrenheit difference","symbol":"Δ°F"},{"id":"delta_rankine","name":"Rankine difference","symbol":"Δ°R"}],"note":null,"calculator":null,"sources":[]}]}