Air - Temperature, Pressure and Density

Air density for pressures and temperatures ranging 0 - 1000 psi and 30 - 600 deg F

Sponsored Links

Weight or density of air (pounds per cubic foot) for different gauge pressures (psi) can be found in the table below:

Density of air ¹⁾ (lb/ft³)
Air temperature (^oF)	Gauge Pressure (psi)
Air temperature (^oF)	0	5	10	20	30	40	50	60	70	80	90	100
30	0.081	0.109	0.136	0.192	0.247	0.302	0.357	0.412	0.467	0.522	0.578	0.633
40	0.080	0.107	0.134	0.188	0.242	0.295	0.350	0.404	0.458	0.512	0.566	0.620
50	0.078	0.105	0.131	0.185	0.238	0.291	0.344	0.397	0.451	0.504	0.557	0.610
60	0.076	0.102	0.128	0.180	0.232	0.284	0.336	0.388	0.440	0.492	0.544	0.596
70	0.075	0.101	0.126	0.177	0.228	0.279	0.330	0.381	0.432	0.483	0.534	0.585
80	0.074	0.099	0.124	0.174	0.224	0.274	0.324	0.374	0.424	0.474	0.524	0.574
90	0.072	0.097	0.121	0.171	0.220	0.269	0.318	0.367	0.416	0.465	0.515	0.564
100	0.071	0.095	0.119	0.168	0.216	0.264	0.312	0.361	0.409	0.457	0.505	0.554
120	0.069	0.092	0.115	0.162	0.208	0.255	0.302	0.348	0.395	0.441	0.488	0.535
140	0.066	0.089	0.111	0.156	0.201	0.246	0.291	0.337	0.382	0.427	0.472	0.517
150	0.065	0.087	0.109	0.154	0.198	0.242	0.287	0.331	0.375	0.420	0.464	0.508
200	0.060	0.081	0.101	0.142	0.183	0.244	0.265	0.306	0.347	0.388	0.429	0.470
250	0.056	0.075	0.094	0.132	0.170	0.208	0.246	0.284	0.322	0.361	0.399	0.437
300	0.052	0.070	0.088	0.123	0.159	0.195	0.230	0.266	0.301	0.337	0.372	0.408
400	0.046	0.062	0.078	0.109	0.141	0.172	0.203	0.235	0.266	0.298	0.329	0.360
500	0.041	0.056	0.070	0.098	0.126	0.154	0.182	0.210	0.238	0.267	0.295	0.323
600	0.038	0.050	0.063	0.089	0.114	0.140	0.165	0.190	0.216	0.241	0.267	0.292

Density of air ¹⁾ (lb/ft³)
Air temperature (^oF)	Gauge Pressure (psi)
Air temperature (^oF)	120	140	150	200	250	300	400	500	700	800	900	1000
30	0.743	0.853	0.909	1.185	1.460	1.736	2.29	1.84	3.94	4.49	5.05	5.60
40	0.728	0.836	0.890	1.161	1.431	1.702	2.24	2.78	3.86	4.40	4.95	5.49
50	0.717	0.823	0.876	1.142	1.408	1.674	2.21	2.74	3.80	4.33	4.87	5.40
60	0.700	0.804	0.856	1.116	1.376	1.636	2.16	2.68	3.72	4.24	4.76	5.28
70	0.687	0.789	0.840	1.095	1.350	1.605	2.12	2.63	3.65	4.16	4.67	5.18
80	0.674	0.774	0.824	1.075	1.325	1.575	2.08	2.58	3.58	4.08	4.58	5.08
90	0.662	0.760	0.809	1.055	1.301	1.547	2.04	2.53	3.51	4.00	4.50	4.99
100	0.650	0.747	0.795	1.036	1.278	1.519	2.00	2.48	3.45	3.93	4.42	4.90
120	0.628	0.721	0.768	1.001	1.234	1.467	1.933	2.40	3.33	3.80	4.26	4.73
140	0.607	0.697	0.742	0.967	1.193	1.418	1.868	2.32	3.22	3.67	4.12	4.57
150	0.597	0.686	0.730	0.951	1.173	1.395	1.838	2.28	3.17	3.61	4.05	4.50
200	0.552	0.634	0.675	0.879	1.084	1.289	1.698	2.11	2.93	3.34	3.75	4.16
250	0.513	0.589	0.627	0.817	1.088	1.198	1.579	1.959	2.72	3.10	3.48	3.86
300	0.479	0.550	0.586	0.764	0.941	1.119	1.475	1.830	2.54	2.90	3.25	3.61
400	0.423	0.486	0.518	0.675	0.832	0.989	1.303	1.618	2.25	2.56	2.87	3.19
500	0.379	0.436	0.464	0.604	0.745	0.886	1.167	1.449	2.01	2.29	2.58	2.86
600	0.343	0.394	0.420	0.547	0.675	0.802	1.057	1.312	1.822	2.08	2.33	2.59

¹⁾ Density is based on atmospheric pressure 14.696 psia and molecular weight of air 28.97

density - 1 lb/ft³ = 16.018 kg/m³
pressure - 1 psi (lb/in²) = 6,894.8 Pa (N/m²)
temperature - T(^oC) = 5/9[T(^oF) - 32]
Unit Converter

Density of air can also be expressed as

ρ = 1.325 p_{in Hg} / T_R (1)

where

ρ = density (lb/ft³)

p_{in Hg}= pressure (inches Hg)

T_R= absolute temperature (Rankine)

Sponsored Links

Related Topics

Fluid Mechanics The study of fluids - liquids and gases. Involves various properties of the fluid, such as velocity, pressure, density and temperature, as functions of space and time.
Material Properties Material properties - density, heat capacity, viscosity and more - for gases, fluids and solids

Related Documents

Air Properties Temperature, density, specific heat, thermal conductivity, expansion coefficient, kinematic viscosity and Prandtl's number for temperatures ranging -150- 400^oC
Air - Altitude, Density and Specific Volume The density and the specific volume of air varies with the elevation above sea level
Density, Specific Weight and Specific Gravity An introduction and definition of density, specific weight and specific gravity - formulas with examples
Molecular Mass of Air Dry air is a mixture of gases where the molecular weight can be calculated by adding the weight of each component
Wind Power Power generated from the wind

Sponsored Links

Engineering ToolBox - SketchUp Edition - Online 3D modeling!

3D Engineering ToolBox - draw and model technical applications

Engineering ToolBox - SketchUp Edition - enabled for use with the amazing, fun and free Google SketchUp.

Search the ToolBox

© The Engineering ToolBox 2005

9 10 26

• Search this Site!

• Translate this Page!

Engineering Standards

Engineering News

Engineering Standards