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Moist Air - Density vs. Pressure

Density of moist air versus pressure ranging 75 - 1000 mm Hg

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Density of moist air with dew point 10 ^oC vs. pressure is indicated below.

density of dry air

density moist air

Density of Moist Air (kg/m³)
Pressure (mm Hg)	Temperature (^oC)
Pressure (mm Hg)	0	10	20	40	60
1000	1.695	1.635	1.579	1.479	1.390
975	1.653	1.594	1.540	1.441	1.355
950	1.610	1.533	1.500	1.404	1.320
925	1.568	1.512	1.461	1.367	1.285
900	1.525	1.471	1.421	1.330	1.250
875	1.482	1.430	1.381	1.293	1.215
850	1.440	1.389	1.342	1.256	1.181
825	1.397	1.348	1.302	1.219	1.146
800	1.355	1.307	1.262	1.182	1.111
775	1.312	1.266	1.223	1.145	1.076
760	1.287	1.241	1.199 ¹⁾	1.122	1.055
750	1.270	1.225	1.183	1.108	1.041
725	1.227	1.184	1.144	1.071	1.006
700	1.185	1.143	1.104	1.033	0.971
675	1.142	1.102	1.064	0.996	0.937
650	1.100	1.061	1.025	0.959	0.902
625	1.057	1.020	0.985	0.922	0.867
600	1.015	0.979	0.945	0.885	0.832
575	0.972	0.938	0.906	0.848	0.797
550	0.930	0.897	0.866	0.811	0.762
525	0.887	0.856	0.827	0.774	0.727
500	0.845	0.815	0.787	0.737	0.692
475	0.802	0.774	0.747	0.700	0.658
450	0.760	0.733	0.708	0.663	0.623
425	0.717	0.692	0.668	0.625	0.588
400	0.674	0.651	0.628	0.588	0.553
375	0.632	0.610	0.589	0.551	0.518
350	0.589	0.569	0.549	0.514	0.483
325	0.547	0.528	0.510	0.477	0.448
300	0.504	0.487	0.470	0.440	0.414
275	0.462	0.446	0.430	0.403	0.379
250	0.419	0.405	0.391	0.366	0.344
225	0.377	0.363	0.351	0.329	0.309
200	0.334	0.322	0.311	0.292	0.274
175	0.292	0.281	0.272	0.254	0.239
150	0.249	0.240	0.232	0.217	0.204
125	0.207	0.199	0.193	0.180	0.169
100	0.164	0.158	0.153	0.143	0.135
75	0.122	0.117	0.113	0.106	0.100

¹⁾ NTP - Normal Temperature and Pressure

1 mm Hg = 1 torr = 0.0193 lb/in² (psi) = 133 N/m² (Pa) = 12.8 mm water

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Related Topics

Air Psychrometrics - The study of moist and humid air - psychrometric charts, Mollier diagrams, air-condition temperatures and absolute and relative humidity and moisture content
Density - Density of different solid materials, liquids and gases. Definitions and convertion calculators.

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Dry Air and Water Vapor - Density and Specific Volume - Imperial Units - Density and specific volume of dry air and water vapor at temperatures ranging 225 to 900 degF (107 to 482 degC)
Humid Air and the Ideal Gas Law - Pressure, temperature and volume for an ideal or perfect gas like air with water vapor - or moist air
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Specific Volume of Moist Air - Specific volume is defined as the total volume of humid air per mass unit of dry air
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