Air Pressure at Altitude Calculator

Find atmospheric pressure at a given altitude.

Pressure (kPa) 79.495

Of sea-level pressure (%) 78.456

Formula: P = P₀·(1 − 0.0065h/288.15)^5.255

Step-by-step with your numbers:

1. Values used:

2. Altitude = 2,000

4. Pressure = 79.495kPa

5. Of sea-level pressure = 78.456%

Did we solve your problem today?

Air pressure drops with altitude following the barometric formula.

The math behind it

P = P₀·(1 − 0.0065h/288.15)^5.255, the standard-atmosphere troposphere model.

At 2000 m → about 79.5 kPa (78% of sea level).

Why is breathing harder up high?

Lower pressure means fewer oxygen molecules per breath.