Moist Air - Density vs. Pressure
Density of moist air vs. pressure ranging 75 - 1000 mmHg.
Density of moist air with dew point 10 oC vs. pressure is indicated below.
| Pressure (mm Hg) | Density of Moist Air (kg/m3) | ||||
|---|---|---|---|---|---|
| Temperature (oC) | |||||
| 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 | 1.553 | 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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