Air Density, Specific Weight, and Thermal Expansion Coefficients

Calculate air density, specific weight, and thermal expansion coefficients at varying temperatures and pressures. Provides conversions between multiple unit systems including kg/m³, lb/ft³, N/m³, and lbf/ft³.

Temperature (°C)	Density (kg/m³)	Specific Weight (N/m³)	Thermal Expansion Coefficient (×10⁻³ K⁻¹)	Density (lb/ft³)	Specific Weight (lbf/ft³)
-75	1.783	17.49	5.14	0.1113	0.11131
-50	1.582	15.52	4.55	0.0988	0.09878
-25	1.422	13.94	4.08	0.0888	0.08877
-15	1.367	13.4	3.92	0.0853	0.08532
-10	1.341	13.15	3.84	0.0837	0.0837
-5	1.316	12.9	3.76	0.0821	0.08214
0	1.292	12.67	3.69	0.0806	0.08063
5	1.268	12.44	3.62	0.0792	0.07919
10	1.246	12.22	3.56	0.0778	0.0778
15	1.225	12.01	3.5	0.0765	0.07645
20	1.204	11.81	3.43	0.0752	0.07516
25	1.184	11.61	3.38	0.0739	0.0739
30	1.164	11.42	3.32	0.0727	0.07269
40	1.127	11.06	3.21	0.0704	0.07039
50	1.093	10.72	3.12	0.0682	0.06822
60	1.06	10.4	3.02	0.0662	0.06619
80	1	9.81	2.85	0.0625	0.06245
100	0.9467	9.28	2.7	0.0591	0.0591
125	0.8868	8.7	2.51	0.0554	0.05536
150	0.8338	8.18	2.33	0.0521	0.05206
175	0.7868	7.72	2.22	0.0491	0.04912
200	0.7451	7.31	2.1	0.0465	0.04651
225	0.7078	6.94	2.01	0.0442	0.04419
300	0.6168	6.05	1.76	0.0385	0.0385
400	0.5238	5.14	1.52	0.0327	0.0327
500	0.4567	4.48	1.32	0.0285	0.02851
600	0.4043	3.96	1.16	0.0252	0.02524
700	0.3626	3.56	1.03	0.0226	0.02264
800	0.3289	3.23	0.94	0.0205	0.02053
900	0.3009	2.95	0.86	0.0188	0.01879
1000	0.2773	2.72	0.8	0.0173	0.01731
1100	0.2571	2.52	0.75	0.016	0.01605