Moist Air - Density vs. Pressure

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

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

density moist air

Density of Moist Air (kg/m3)
Pressure
(mm Hg)
Temperature (oC)
010204060
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

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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