Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

Air - Thermal Conductivity vs. Temperature and Pressure

Sponsored Links

Thermal conductivity is a material property that describes ability to conduct heat . Thermal conductivity can be defined as

" the quantity of heat transmitted through a unit thickness of a material - in a direction normal to a surface of unit area - due to a unit temperature gradient under steady state conditions".

Thermal conductivity most common units are W/(m K) in the SI system and Btu/(h ft °F) in the Imperial system.

Tabulated values and thermal conductivity units conversion are given below the figures.

Online Air Thermal Conductivity Calculator

The calculator below can be used to calculate the air thermal conductivity at given temperatures and pressure.
The output conductivity is given as mW/(m K), Btu(IT)/(h ft °F) and kcal(IT)/(h m K).

Choose the actual unit of temperature:
Choose the actual pressure:


See also other properties of Air at varying temperature and pressure: Density and specific weight at varying temperature , Density at varying pressure , Diffusion Coefficients for Gases in Air , Prandtl Number , Specific heat at varying temperature and Specific heat at varying pressure , Thermal Diffusivity , Properties at gas-liquid equilibrium conditions and Air thermophysical properties at standard conditions and Composition and molecular weight ,
as well as thermal conductivity o f ammonia , butane , carbon dioxide , ethane , ethylene , hydrogen , methane , nitrogen , propane and water .

See also Conductive Heat Transfer Calculator

Back to top



Back to top




Back to top

Air thermal conductivity at atmospheric pressure and temperatures given in °C:

Air - Thermal Conductivity vs. Temperature at Atmospheric Pressure - SI Units
Temperature Thermal conductivity
[°C] [mW/m K] [kcal(IT)/(h m K)] [Btu(IT)/(h ft °F)]
-190 7.82 0.00672 0.00452
-150 11.69 0.01005 0.00675
-100 16.20 0.01393 0.00936
-75 18.34 0.01577 0.01060
-50 20.41 0.01755 0.01179
-25 22.41 0.01927 0.01295
-15 23.20 0.01995 0.01340
-10 23.59 0.02028 0.01363
-5 23.97 0.02061 0.01385
0 24.36 0.02094 0.01407
5 24.74 0.02127 0.01429
10 25.12 0.02160 0.01451
15 25.50 0.02192 0.01473
20 25.87 0.02225 0.01495
25 26.24 0.02257 0.01516
30 26.62 0.02289 0.01538
40 27.35 0.02352 0.01580
50 28.08 0.02415 0.01623
60 28.80 0.02477 0.01664
80 30.23 0.02599 0.01746
100 31.62 0.02719 0.01827
125 33.33 0.02866 0.01926
150 35.00 0.03010 0.02022
175 36.64 0.03151 0.02117
200 38.25 0.03289 0.02210
225 39.83 0.03425 0.02301
300 44.41 0.03819 0.02566
412 50.92 0.04378 0.02942
500 55.79 0.04797 0.03224
600 61.14 0.05257 0.03533
700 66.32 0.05702 0.03832
800 71.35 0.06135 0.04122
900 76.26 0.06557 0.04406
1000 81.08 0.06971 0.04685
1100 85.83 0.07380 0.04959

Back to top
Air thermal conductivity at atmospheric pressure and temperatures given in °F:

Air - Thermal Conductivity vs. Temperature at Atmospheric Pressure - Imperial Units
Temperature Thermal conductivity
[°F] [Btu(IT)/(h ft °F)] [kcal(IT)/(h m K)] [mW/m K]
-300 0.00484 0.00720 8.37
-200 0.00788 0.01172 13.63
-100 0.01068 0.01589 18.48
-50 0.01200 0.01786 20.77
-20 0.01277 0.01901 22.10
0 0.01328 0.01976 22.98
10 0.01353 0.02013 23.41
20 0.01378 0.02050 23.84
30 0.01402 0.02087 24.27
40 0.01427 0.02123 24.70
50 0.01451 0.02160 25.12
60 0.01476 0.02196 25.54
70 0.01500 0.02232 25.95
80 0.01524 0.02267 26.37
100 0.01571 0.02338 27.19
120 0.01618 0.02408 28.00
140 0.01664 0.02477 28.80
160 0.01710 0.02545 29.60
180 0.01755 0.02612 30.38
200 0.01800 0.02679 31.16
250 0.01911 0.02843 33.07
300 0.02018 0.03003 34.93
350 0.02123 0.03160 36.75
400 0.02226 0.03313 38.53
450 0.02327 0.03463 40.28
500 0.02426 0.03611 41.99
600 0.02620 0.03898 45.34
700 0.02807 0.04177 48.58
800 0.02990 0.04449 51.74
1000 0.03342 0.04973 57.84
1200 0.03680 0.05477 63.69
1400 0.04007 0.05963 69.35
1600 0.04325 0.06436 74.85
1800 0.04635 0.06898 80.23
2000 0.04941 0.07353 85.51

Thermal conductivity units conversion:

Thermal conductivity unit converter

british thermal unit(international)/(foot hour degree fahrenheit) [Btu(IT)/(ft h°F], british thermal unit(international)/(inch hour degree fahrenheit) [Btu(IT)/(in h°F], british thermal unit(international)*inch/(square foot*hour*degree fahrenheit) [(Btu(IT) in)/(ft² h°F)], kilocalorie/(meter hour degree celcius) [kcal/(m h°C)], joule/(centimeter second degree kelvin) [J/(cm s K)], watt/(meter degree kelvin) [W/(m°C)],

  • 1 Btu(IT)/(ft h°F) = 1/12 Btu(IT)/(in h°F) = 0.08333 Btu(IT)/(in h°F) = 12 Btu(IT)in/(ft2h°F) = 1.488 kcal/(m h°C) = 0.01731 J/(cm s K) = 1.731 W/(m K)
  • 1 Btu(IT)/(in h°F) = 12 Btu(IT)/(ft h°F) = 144 Btu(IT)in/(ft2h°F) = 17.858 kcal/(m h°C) = 0.20769 J/(cm s K)= 20.769 W/(m K)
  • 1 (Btu(IT) in)/(ft² h°F) = 0.08333 Btu(IT)/(ft h°F) = 0.00694 Btu(IT)/(in h°F) = 0.12401 kcal/(m h°C) = 0.001442 J/(cm s K) = 0.1442 W/(m K)
  • 1 J/(cm s K) = 100 W/(m K) = 57.789 Btu(IT)/(ft h°F) = 4.8149 Btu(IT)/(in h°F) = 693.35 (Btu(IT) in)/(ft² h°F) = 85.984 kcal/(m h°C)
  • 1 kcal/(m h°C) = 0.6720 Btu(IT)/(ft h°F) = 0.05600 Btu(IT)/(in h°F) = 8.0636 (Btu(IT) in)/(ft2h°F) = 0.01163 J/(cm s K) = 1.163 W/(m K)
  • 1 W/(m K) = 0.01 J/(cm s K) = 0.5779 Btu(IT)/(ft h°F) = 0.04815 Btu(IT)/(in h°F) = 6.9335 (Btu(IT) in)/(ft² h°F) = 0.85984 kcal/(m h°C)

Back to top

Sponsored Links

Related Topics

Air Psychrometrics

Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.

Fluid Mechanics

The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.

Gases and Compressed Air

Properties of air, LNG, LPG and other common gases. Pipeline capacities and sizing of relief valves.

Material Properties

Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

Related Documents

Air - Composition and Molecular Weight

Dry air is a mechanical mixture of nitrogen, oxygen, argon and several other gases in minor amounts.

Air - Density vs. Pressure and Temperatures

Air density at pressure ranging 1 to 10 000 bara (14.5 - 145000 psi) and constant selected temperatures.

Air - Density, Specific Weight and Thermal Expansion Coefficient vs. Temperature and Pressure

Online calculator, figures and tables showing density, specific weight and thermal expansion coefficients of air at temperatures ranging -100 to 1600 °C (-140 to 2900 °F) at atmospheric and higher pressure - Imperial and SI Units.

Air - Diffusion Coefficients of Gases in Excess of Air

Diffusion coefficients (D12) for gases in large excess of air at temperatures ranging 0 - 400 °C.

Air - Dynamic and Kinematic Viscosity

Online calculator, figures and tables with dynamic (absolute) and kinematic viscosity for air at temperatures ranging -100 to 1600°C (-150 to 2900°F) and at pressures ranging 1 to 10 000 bara (14.5 - 145000 psia) - SI and Imperial Units.

Air - Humidity Ratio

The mass of water vapor present in moist air - to the mass of dry air.

Air - Moisture Holding Capacity vs. Temperature

The moisture holding capacity of air increases with temperature.

Air - Molecular Weight and Composition

Dry air is a mixture of gases where the average molecular weight (or molar mass) can be calculated by adding the weight of each component.

Air - Prandtl Number

Prandtl number for air vs. temperature and pressure.

Air - Specific Heat Ratio

Specific Heat Ratio of air at temperatures ranging -40 - 1000 degC (-40 - 1500 degF) at standard atmospheric pressure - Imperial and SI Units.

Air - Specific Heat vs. Pressure at Constant Temperature

Figures and tables with isobaric (Cp) and isochoric (Cv) specific heat of air at constant temperature and pressure ranging 0.01 to 10000 bara.

Air - Specific Heat vs. Temperature at Constant Pressure

Online calculator with figures and tables showing specific heat (Cp and Cv) of dry air vs. temperature and pressure. SI and imperial units.

Air - Speed of Sound vs. Temperature

Speed of sound in air at standard atmospheric pressure with temperatures ranging -40 to 1000 °C (-40 to 1500 °F) - Imperial and SI Units.

Air - Thermal Diffusivity vs. Temperature and Pressure

Figures and tables withdry air thermal diffusivity vs. temperarure and pressure. SI and Imperial units.

Air - Thermophysical Properties

Thermal properties of air at different temperatures - density, viscosity, critical temperature and pressure, triple point, enthalpi and entropi, thermal conductivity and diffusivity and more.

Air Conditioning - Cooling of Air and Condensate Generated

Water may condensate when air is cooled in air conditioning systems.

Air Properties - SI Units

Ideal gas properties of air at low pressure - SI units.

Ammonia - Thermal Conductivity vs. Temperature and Pressure

Online calculator, figures and tables showing thermal conductivity of liquid and gaseous ammonia at temperatures ranging -70 to 425 °C (-100 to 800 °F) at atmospheric and higher pressure - Imperial and SI Units.

Butane - Thermal Conductivity vs. Temperature and Pressure

Online calculators, figures and tables showing thermal conductivity of liquid and gaseous butane, C4H10, at varying temperature and pressure, SI and Imperial units.

Carbon dioxide - Thermal Conductivity vs. Temperature and Pressure

Online calculator, figures and table showing thermal conductivity of carbon dioxide, CO2, at temperatures ranging from -50 to 775 °C (-50 to 1400 °F) at atmospheric and higher pressure - Imperial and SI Units.

Compressed Air - Pressure Drop Diagrams, Metric Units

Pressure loss in compressed air pipe lines.

Dry Air - Thermodynamic and Physical Properties

Thermodynamic properties of dry air - specific heat, ratio of specific heats, dynamic viscosity, thermal conductivity, Prandtl number, density and kinematic viscosity at temperatures ranging 175 - 1900 K.

Ethane - Thermal Conductivity vs. Temperature and Pressure

Online calculator, figures and table showing thermal conductivity of ethane, C2H6, at varying temperature and pressure - Imperial and SI Units.

Ethylene - Thermal Conductivity vs. Temperature and Pressure

Online calculator, figures and table showing thermal conductivity of ethylene, also called ethene or acetene, C2H4, at varying temperature and pressure - Imperial and SI Units.

Humid Air - Heating

Enthalpy change and temperature rise when heating humid air without adding moisture.

Hydrogen - Thermal Conductivity vs. Temperature and Pressure

Online calculator, figures and table showing thermal conductivity of hydrogen, H2, at varying temperature and pressure - Imperial and SI Units.

Methane - Thermal Conductivity vs. Temperature and Pressure

Online calculator, figures and table showing thermal conductivity of methane, CH4, at temperatures ranging from -160 to 725 °C (-260 to 1300 °F) at atmospheric and higher pressure - Imperial and SI Units.

Moist Air - Properties

Psychrometric table with humid air properties like saturation pressure, specific volume, enthalpy and entropy.

Moist Air - Specific Volume

Specific volume of moist air is defined as the total volume of humid air per mass unit of dry air

Moist Air - Weight of Water Vapor

Weight of water vapor in air

Propane - Thermal Conductivity vs. Temperature and Pressure

Online calculator, figures and tables showing thermal conductivity of liquid and gaseous propane at varying temperarure and pressure, SI and Imperial units.

Solubility of Air in Water

The amount of air that can be dissolved in water decreases with temperature and increases with pressure.

STP - Standard Temperature and Pressure and NTP - Normal Temperature and Pressure

The definition of STP - Standard Temperature and Pressure and NTP - Normal Temperature and Pressure.

U.S. Standard Atmosphere vs. Altitude

Properties of the US standard atmosphere ranging -5000 to 250000 ft altitude.

Water - Thermal Conductivity vs. Temperature

Figures and tables showing thermal conductivity of water (liquid and gas phase) with varying temperature and pressure, SI and Imperial units.

Sponsored Links

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Privacy

We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.