Air Properties: Temperature, Pressure & Density Data (original) (raw)

Density is the ratio of the mass to the volume of a substance:

ρ = m / V (1)

where

ρ = density, units typically (kg/m3) or (lb/ft3)

m = mass, units typically (kg) or (lb)

V = volume, units typically (m3) or (ft3)

Tabulated values and density units conversion are given below the figures.

See also Air Composition and molecular weight, Density and specific weight at varying temperature, Diffusion Coefficients for Gases in Air, Dynamic (absolute) and kinematic viscosity, Prandtl Number, Specific heat at varying temperature and Specific heat at varying pressure, Thermal Conductivity, Thermal Diffusivity, Properties at gas-liquid equilibrium conditions and Air thermophysical properties, for other properties of air .

See Density and specific weight o f acetone, ammonia, argon, benzene, butane, carbon dioxide, carbon monoxide, ethane, ethanol, ethylene, helium, hydrogen, methane, methanol, nitrogen, oxygen, pentane, propane, toluene and water, as well as Density of crude oil , Density of fuel oils , Density of lubricating oil and Density of jet fuel as function of temperature.

Figures showing air density at ambient pressures (80-105 kPa, 0.8-1.05 bara, 11.6-15.4 psia) and temperatures:

air_density_temperature_pressure

air_density_temperature_pressure_F

Figures showing air density as function of gauge pressure (0-20 bar, 0-300 psi) at selected temperatures:

Air density pressure temperature bar

Air density pressure temperature psi

Figures showing air density as function of absolute pressure (1-10 000 bar, 14.5 - 150 000 psia) at selected temperatures:

Air density pressure temperature C

Air density pressure temperature F

Weight or density of air (pounds per cubic foot) for different gauge pressures (psi) :

For full table - rotate the screen!

Air - Density vs. Pressure and Temperatures - Imperial Units

Gauge pressure Density of air (lb/ft3) at different temperatures (°F)
(psi) 30 40 50 60 70 80 90 100 120 140 150 200 250 300 400 500 600
0 0.081 0.080 0.078 0.076 0.075 0.074 0.072 0.071 0.069 0.066 0.065 0.060 0.056 0.052 0.046 0.041 0.038
5 0.109 0.107 0.105 0.102 0.101 0.099 0.097 0.095 0.092 0.089 0.087 0.081 0.075 0.070 0.062 0.056 0.05
10 0.136 0.134 0.131 0.128 0.126 0.124 0.121 0.119 0.115 0.111 0.109 0.101 0.094 0.088 0.078 0.070 0.063
20 0.192 0.188 0.185 0.180 0.177 0.174 0.171 0.168 0.162 0.156 0.154 0.142 0.132 0.123 0.109 0.098 0.089
30 0.247 0.242 0.238 0.232 0.228 0.224 0.220 0.216 0.208 0.201 0.198 0.183 0.170 0.159 0.141 0.126 0.114
40 0.302 0.295 0.291 0.284 0.279 0.274 0.269 0.264 0.255 0.246 0.242 0.225 0.208 0.195 0.172 0.154 0.140
50 0.357 0.350 0.344 0.336 0.330 0.324 0.318 0.312 0.302 0.291 0.287 0.265 0.246 0.23 0.203 0.182 0.165
60 0.412 0.404 0.397 0.388 0.381 0.374 0.367 0.361 0.348 0.337 0.331 0.306 0.284 0.266 0.235 0.210 0.190
70 0.467 0.458 0.451 0.440 0.432 0.424 0.416 0.409 0.395 0.382 0.375 0.347 0.322 0.301 0.266 0.238 0.216
80 0.522 0.512 0.504 0.492 0.483 0.474 0.465 0.457 0.441 0.427 0.420 0.388 0.361 0.337 0.298 0.267 0.241
90 0.578 0.566 0.557 0.544 0.534 0.524 0.515 0.505 0.488 0.472 0.464 0.429 0.399 0.372 0.329 0.295 0.267
100 0.633 0.620 0.610 0.596 0.585 0.574 0.564 0.554 0.535 0.517 0.508 0.470 0.437 0.408 0.360 0.323 0.292
120 0.743 0.728 0.717 0.700 0.687 0.674 0.662 0.650 0.628 0.607 0.597 0.552 0.513 0.479 0.423 0.379 0.343
140 0.853 0.836 0.823 0.804 0.789 0.774 0.760 0.747 0.721 0.697 0.686 0.634 0.589 0.550 0.486 0.436 0.394
150 0.909 0.890 0.876 0.856 0.840 0.824 0.809 0.795 0.768 0.742 0.730 0.675 0.627 0.586 0.518 0.464 0.420
200 1.185 1.161 1.142 1.116 1.095 1.075 1.055 1.036 1.001 0.967 0.951 0.879 0.817 0.764 0.675 0.604 0.547
250 1.46 1.431 1.408 1.376 1.350 1.325 1.301 1.278 1.234 1.193 1.173 1.084 1.008 0.941 0.832 0.745 0.675
300 1.736 1.702 1.674 1.636 1.605 1.575 1.547 1.519 1.467 1.418 1.395 1.289 1.198 1.119 0.989 0.886 0.802
400 2.29 2.24 2.21 2.16 2.12 2.08 2.04 2.00 1.933 1.868 1.838 1.698 1.579 1.475 1.303 1.167 1.057
500 2.84 2.78 2.74 2.68 2.63 2.58 2.53 2.48 2.4 2.32 2.28 2.11 1.959 1.83 1.618 1.449 1.312
700 3.94 3.86 3.8 3.72 3.65 3.58 3.51 3.45 3.33 3.22 3.17 2.93 2.72 2.54 2.25 2.01 1.822
800 4.49 4.4 4.33 4.24 4.16 4.08 4.00 3.93 3.8 3.67 3.61 3.34 3.1 2.9 2.56 2.29 2.08
900 5.05 4.95 4.87 4.76 4.67 4.58 4.50 4.42 4.26 4.12 4.05 3.75 3.48 3.25 2.87 2.58 2.33
1000 5.6 5.49 5.4 5.28 5.18 5.08 4.99 4.9 4.73 4.57 4.5 4.16 3.86 3.61 3.19 2.86 2.59

Weight or density of air (kilograms per cubic meter) for different gauge pressures (bar) :

For full table - rotate the screen!

Air - Density vs. Pressure and Temperatures - SI Units

Gauge pressure Density of air (kg/m3) at different temperatures (°C)
(bar) -1.1 4.4 10.0 15.6 21.1 26.7 32.2 37.8 48.9 60.0 65.6 93.3 121.1 148.9 204.4 260.0 315.6
0.00 1.30 1.28 1.25 1.22 1.20 1.19 1.15 1.14 1.11 1.06 1.04 0.96 0.90 0.83 0.74 0.66 0.61
0.34 1.75 1.71 1.68 1.63 1.62 1.59 1.55 1.52 1.47 1.43 1.39 1.30 1.20 1.12 0.99 0.90 0.80
0.69 2.18 2.15 2.10 2.05 2.02 1.99 1.94 1.91 1.84 1.78 1.75 1.62 1.51 1.41 1.25 1.12 1.01
1.38 3.08 3.01 2.96 2.88 2.84 2.79 2.74 2.69 2.59 2.50 2.47 2.27 2.11 1.97 1.75 1.57 1.43
2.07 3.96 3.88 3.81 3.72 3.65 3.59 3.52 3.46 3.33 3.22 3.17 2.93 2.72 2.55 2.26 2.02 1.83
2.72 4.84 4.73 4.66 4.55 4.47 4.39 4.31 4.23 4.08 3.94 3.88 3.60 3.33 3.12 2.76 2.47 2.24
3.45 5.72 5.61 5.51 5.38 5.29 5.19 5.09 5.00 4.84 4.66 4.60 4.24 3.94 3.68 3.25 2.92 2.64
4.14 6.60 6.47 6.36 6.22 6.10 5.99 5.88 5.78 5.57 5.40 5.30 4.90 4.55 4.26 3.76 3.36 3.04
4.83 7.48 7.34 7.22 7.05 6.92 6.79 6.66 6.55 6.33 6.12 6.01 5.56 5.16 4.82 4.26 3.81 3.46
5.52 8.36 8.20 8.07 7.88 7.74 7.59 7.45 7.32 7.06 6.84 6.73 6.22 5.78 5.40 4.77 4.28 3.86
6.21 9.26 9.07 8.92 8.71 8.55 8.39 8.25 8.09 7.82 7.56 7.43 6.87 6.39 5.96 5.27 4.73 4.28
6.89 10.14 9.93 9.77 9.55 9.37 9.19 9.03 8.87 8.57 8.28 8.14 7.53 7.00 6.54 5.77 5.17 4.68
8.27 11.90 11.66 11.49 11.21 11.00 10.80 10.60 10.41 10.06 9.72 9.56 8.84 8.22 7.67 6.78 6.07 5.49
9.65 13.66 13.39 13.18 12.88 12.64 12.40 12.17 11.97 11.55 11.16 10.99 10.16 9.43 8.81 7.78 6.98 6.31
10.34 14.56 14.26 14.03 13.71 13.46 13.20 12.96 12.73 12.30 11.89 11.69 10.81 10.04 9.39 8.30 7.43 6.73
13.79 18.98 18.60 18.29 17.88 17.54 17.22 16.90 16.60 16.03 15.49 15.23 14.08 13.09 12.24 10.81 9.68 8.76
17.24 23.39 22.92 22.55 22.04 21.62 21.22 20.84 20.47 19.77 19.11 18.79 17.36 16.15 15.07 13.33 11.93 10.81
20.68 27.81 27.26 26.81 26.21 25.71 25.23 24.78 24.33 23.50 22.71 22.35 20.65 19.19 17.92 15.84 14.19 12.85
27.58 36.68 35.88 35.40 34.60 33.96 33.32 32.68 32.04 30.96 29.92 29.44 27.20 25.29 23.63 20.87 18.69 16.93
34.47 45.49 44.53 43.89 42.93 42.13 41.33 40.53 39.73 38.44 37.16 36.52 33.80 31.38 29.31 25.92 23.21 21.02
48.26 63.11 61.83 60.87 59.59 58.47 57.35 56.22 55.26 53.34 51.58 50.78 46.93 43.57 40.69 36.04 32.20 29.19
55.16 71.92 70.48 69.36 67.92 66.64 65.36 64.07 62.95 60.87 58.79 57.83 53.50 49.66 46.45 41.01 36.68 33.32
62.05 80.89 79.29 78.01 76.25 74.81 73.36 72.08 70.80 68.24 66.00 64.87 60.07 55.74 52.06 45.97 41.33 37.32
68.95 89.70 87.94 86.50 84.58 82.98 81.37 79.93 78.49 75.77 73.20 72.08 66.64 61.83 57.83 51.10 45.81 41.49

Density units conversion:

Density converter

kilogram/cubic meter (kg/m3) = gram/liter (g/l), kilogram/liter (kg/l) = gram/cubic centimeter (g/cm3)= ton(metric)/cubic meter (t/m3), once/gallon(US liquid) (oz/gal(US liq)) pound/cubic inch (lb/in3), pound/cubic foot (lb/ft3), pound/gallon(UK) (lb/gal(UK)), pound/gallon(US liquid) (lb/gal(US liq)), slug/cubic foot (sl/ft3), ton(short)/cubic yard (ton(short)/yd3), ton(long)/cubic yard (yd3)

Examples

The density of air can be calculated as

ρ = 1.325 pinHg / TR

= 2.7 ppsia / TR

= 2.7 (ppsig + 14.7) / (TF + 459.7) (2)

where

ρ = density (lb/ft3)

pinHg = absolute pressure (inches Hg)

TR = absolute temperature (Rankine)

ppsia = absolute pressure (psia)

ppsig = gage pressure (psig)

TF = temperature (oF)

Example - Weight of Air

The density of air at pressure 29.92 inches Hg at 100 degrees F can be calculated as

ρ = 1.325 ( 29.92 inches Hg ) / ((100 oF) + 459.7)

= 0.0708 lb/ft3

The weight of 10 ft3 air can be calculated as

W = (10 ft3) (0.071 lb/ft3)

= 0.708 lb

Air Properties - Density, Viscosity, Heat Capacity, Thermal Conductivity, and more

Air Properties - Density, Viscosity, Heat Capacity, Thermal Conductivity, and more

Thermal properties of air, including density, viscosity, thermal conductivity, specific heat and more at different temperatures and pressures. Comprehensive reference with formulas, tables, and charts to support engineering calculations.

Ammonia Gas - Density vs. Temperature and Pressure

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Solubility of Air in Water

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