Air - Thermal Conductivity vs. Temperature and Pressure

Online calculator with figures and tables showing air thermal conductivity vs. temperature and pressure. SI and imperial units.

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).

Temperature
Choose the actual unit of temperature: °C °F K °R

Choose the actual pressure: 1 bara / 14.5 psia; 20 bara / 290 psia; 50 bara / 725 psia; 100 bara / 1450 psia;

Load Calculator!

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

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

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/(ft² h°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/(ft² h°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)/(ft² h°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)

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Air - Thermal Conductivity vs. Temperature and Pressure

Online calculator with figures and tables showing air thermal conductivity vs. temperature and pressure. SI and imperial units.

Online Air Thermal Conductivity Calculator

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