Explore the relationship between altitude and air pressure with our accurate online calculator. Whether you're a pilot, hiker, or engineer, quickly find the barometric pressure at a specific height above sea level. Understand how atmospheric pressure decreases as you ascend and its impact on various applications.
Formula:
The air pressure at altitude (P) is calculated using a variation of the barometric formula for the International Standard Atmosphere (ISA) below the tropopause:
P = P0 * (1 - L*h/T0)(g*M/(R*L))
Where:
- P: Air Pressure at Altitude (Pascals)
- P0: Standard Sea-Level Pressure (Pascals, e.g., 101325 Pa)
- L: Temperature Lapse Rate (0.0065 K/m)
- h: Altitude above sea level (meters)
- T0: Standard Sea-Level Temperature (Kelvin, e.g., 288.15 K)
- g: Gravitational Acceleration (9.80665 m/s²)
- M: Molar Mass of Dry Air (0.0289644 kg/mol)
- R: Universal Gas Constant (8.314462618 J/(mol·K))