What Is the Air Pressure at 4,000 m Altitude?
Atmospheric pressure at 4,000 m altitude is approximately 616 hPa.
How to use this tool
- Enter your altitude in metres above sea level.
- The calculator uses the international standard atmosphere barometric formula to compute pressure.
- Results are shown in hectopascals (hPa), PSI, and as a percentage of sea-level pressure.
High-altitude locations like the Bolivian Altiplano (~4,000 m) experience around 616 hPa of atmospheric pressure.
Frequently asked questions
- How does altitude affect air pressure?
- Atmospheric pressure decreases with altitude because there is less air above. At 1000 m, pressure is about 89% of sea level. At 5000 m (similar to high-altitude treks), pressure drops to around 54% of sea level.
- What is the barometric formula?
- The standard barometric formula is P = 1013.25 × (1 − 2.2557×10⁻⁵ × h)^5.25588, where h is altitude in metres and P is pressure in hPa. It is valid up to about 11,000 m.
- How does altitude affect the human body?
- At altitudes above 2400 m (8000 ft), reduced oxygen availability can cause altitude sickness (AMS). Above 5500 m, acclimatisation becomes very difficult and supplemental oxygen may be needed.