Air Temperature, Pressure and Density vs. Altitude

Elevation above sea level and air temperature, pressure and density. Standard values for pressure, temperature and density at altitudes from sea level to 16,000 feet (about 4900 m).

Altitude (feet)	Abs. Pressure (in. Hg)	Temp. (°F)	Density (%)
Sea level	29.92	59	100
2000	27.82	51.9	94.3
4000	25.84	44.7	88.8
6000	23.98	37.6	83.6
8000	22.22	30.5	78.6
10000	20.57	23.3	73.8
12000	19.02	16.2	69.3
14000	17.57	9.1	65
16000	16.21	1.9	60.9

Conversion Factors and Formulas

Density: % of density at sea level
1 ft (foot) = 0.3048 m
1 in mercury (Hg) = 3,376.8 N/m² (Pa) = 0.49 lb/in² (psi) = 12.8 in water
Temperature Conversion: T (°C) = 5/9 × (T (°F) - 32)

Calculator

Inputs

Temperature (°F) (°F)

Pressure (in. Hg) (in. Hg)

Density (%)

Results

Temperature (°C)-- °C

Pressure (Pa)-- Pa

Pressure (psi)-- psi