# What Is The True Altitude When Flying?

Have you ever wondered what altitude is an airplane flying at? Wondered how to estimate the altitude of a plane flying in the sky? In this article, we’ll explore the true altitude when flying and teach you how to estimate it!

## What is the True Altitude When Flying?

The true altitude when flying is the actual height of the aircraft above the ground. This is different from the pressure altitude, which is the height of the aircraft above sea level. The true altitude is affected by factors such as temperature and air pressure.

## What Is The Difference Between The Pressure At Sea Level & The Pressure In A Plane?

The pressure at sea level is higher than the pressure in a plane because the atmospheric pressure is greater at lower altitudes. The difference in pressure is due to the weight of the air above the surface of the earth. At sea level, the air pressure is about 14.7 pounds per square inch (PSI). In a plane, the air pressure is about 8 PSI. The lower air pressure in a plane makes it easier for the plane to fly because there is less resistance to its motion.

## How High Is The Air In An Airplane?

The average cruising altitude of a commercial airliner is around 35,000 feet, but the air pressure inside the cabin is maintained at a much lower level. In fact, at cruising altitude, the air pressure inside the cabin is equivalent to the air pressure at an altitude of just 8,000 feet. So how high is the air in an airplane?

At cruising altitude, the atmospheric pressure outside the aircraft is much higher than inside the cabin. This difference in pressure creates a force that pushes against the walls of the aircraft. The strength of this force depends on the difference in pressure between the outside and inside of the aircraft, and it increases with altitude.

So, while the air inside an airplane is not as high as you might think, it is still under a lot of pressure. This pressure helps to keep the aircraft stable and prevents it from breaking apart at high altitudes.

## Why Are There Air Sickness Bags in Planes?

There are air sickness bags in planes because of the potential for turbulence. When flying, the plane is constantly changing altitudes, which can cause the cabin pressure to change. This can lead to discomfort and even nausea for some passengers. The air sickness bags provide a way for these passengers to relieve themselves if they start to feel sick.

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