# Air pressure Calculator

Enter the value that you want to calculate air pressure..

 Fill in the value of the known unit and click on ‘Calculate’ to calculate the four unknown air pressure units. Pascal (hPa) Bar (mBar) Inches of Mercury (inHg) Torr (mmHg) Atmosphere (atm)

## Air Pressure Calculator

#### Understanding Quarts and Ounces

Air pressure is the force exerted by the weight of air above a specific point. It impacts weather patterns, flying, and even breathing.

#### Formula for Calculating Air Pressure

The general formula to calculate air pressure is:

$P = \frac{F}{A}$

For atmospheric pressure calculations, a specific formula is used:

$P = P_0 \times \left(1 - \frac{L \times h}{T_0}\right)^{\frac{g \times M}{R \times L}}$

#### Uses and Applications

• Weather Forecasting
• Aviation
• Engineering
• Scuba Diving

#### How do you calculate air pressure?

Use the Barometric Formula, considering temperature, altitude, and atmosphere composition.

#### What is the SI unit of pressure?

The SI unit for pressure is the Pascal (Pa).

#### How do you calculate air pressure?

Air pressure at a specific altitude can be calculated using the Barometric Formula, which considers the temperature, altitude, and the composition of the Earth's atmosphere.

#### What is the formula for calculating pressure?

The basic formula for calculating pressure is $$P = \frac{F}{A}$$, where $$P$$ is pressure, $$F$$ is force, and $$A$$ is area. For atmospheric pressure, specific atmospheric models and formulas are applied.

#### What is the pressure at 25 km?

At 25 km above sea level, the air pressure significantly drops compared to sea level. Precise values require atmospheric data but generally fall within low-pressure ranges.

#### What is total air pressure?

Total air pressure is the sum of all partial pressures of gases that make up the Earth's atmosphere, measured at a specific location.

#### What is air pressure in CFM?

CFM (cubic feet per minute) is a measure of air flow, not pressure. Air pressure measurements are typically in units like Pascals or PSI.

#### What is the unit of pressure?

Common units of pressure include Pascals (Pa), atmospheres (atm), and pounds per square inch (PSI).

#### What is high air pressure?

High air pressure, or a high-pressure system, typically brings clear skies and calm weather. It's when the atmospheric pressure is above the average.

#### What is the symbol for pressure?

The symbol for pressure is typically $$P$$.

#### What is the SI unit of pressure?

The SI unit for pressure is the Pascal (Pa).

#### How do you calculate air pressure from volume?

Using the ideal gas law, $$PV = nRT$$, where $$P$$ is pressure, $$V$$ is volume, $$n$$ is moles of gas, $$R$$ is the gas constant, and $$T$$ is temperature.

#### How do you calculate air pressure in a pipe?

To calculate air pressure in a pipe, one must consider the flow rate, the diameter of the pipe, and the air's viscosity, usually through specific fluid dynamics equations.

#### What unit is pressure?

Pressure is commonly measured in Pascals (Pa), but other units like PSI (pounds per square inch) and atmospheres (atm) are also used.

#### Relationship Between Altitude and Pressure

Altitude above Sea Level Absolute Atmospheric Pressure
feet miles meters kPa atm psia
-5000 -0.95 -1524 121.0 1.19 17.55
-4000 -0.76 -1219 116.9 1.15 16.95
-3000 -0.57 -914 112.8 1.11 16.36
-2000 -0.38 -610 108.9 1.07 15.79
-1000 -0.19 -305 105.0 1.04 15.24
-500 -0.09 -152 103.2 1.02 14.96
0 0.00 0 101.3 1.00 14.70
500 0.09 152 99.5 0.98 14.43
1000 0.19 305 97.7 0.96 14.17
1500 0.28 457 96.0 0.95 13.92
2000 0.38 610 94.2 0.93 13.66
2500 0.47 762 92.5 0.91 13.42
3000 0.57 914 90.8 0.90 13.17
3500 0.66 1067 89.1 0.88 12.93
4000 0.76 1219 87.5 0.86 12.69
4500 0.85 1372 85.9 0.85 12.46
5000 0.95 1524 84.3 0.83 12.23
6000 1.14 1829 81.2 0.80 11.78
7000 1.33 2134 78.2 0.77 11.34
8000 1.52 2438 75.3 0.74 10.92
9000 1.70 2743 72.4 0.71 10.51
10000 1.89 3048 69.7 0.69 10.11
15000 2.84 4572 57.2 0.56 8.29
20000 3.79 6096 46.6 0.46 6.75
25000 4.73 7620 37.6 0.37 5.45
30000 5.68 9144 30.1 0.30 4.36
35000 6.63 10668 23.8 0.24 3.46
40000 7.58 12192 18.8 0.19 2.72
45000 8.52 13716 14.7 0.15 2.14
50000 9.47 15240 11.6 0.11 1.68
55000 10.42 16764 9.1 0.09 1.32
60000 11.36 18288 7.2 0.07 1.04
65000 12.31 19812 5.6 0.06 0.82