Density Altitude Calculator

The Density Altitude Calculator allows users to compute the density altitude, vapor pressure, relative humidity, and virtual temperature based on inputs like pressure altitude, outside air temperature, dewpoint, and altimeter setting.

Use Our Density Altitude Calculator

How to Use the Density Altitude Calculator

Step 1: Enter Pressure Altitude

Locate the field labeled Pressure Altitude (ft). Enter the current pressure altitude in feet into this field.
Ensure that the value is within the range of -1000 to 50,000 feet, using whole numbers as your input.
This field is required to proceed with calculations.

Step 2: Input Outside Air Temperature

Find the input labeled Outside Air Temperature (°C). You need to enter the outside air temperature in degrees Celsius.
Make sure your input falls between -50 and 50 degrees Celsius and use one decimal place for precision.
This input is also mandatory.

Step 3: Provide Dewpoint

In the Dewpoint (°C) field, enter the dewpoint temperature in degrees Celsius.
This temperature should be within -50 to 50 degrees Celsius, also using a single decimal precision.
This data is crucial for further calculations.

Step 4: Enter Altimeter Setting

Proceed to the field marked Altimeter Setting (inHg). Input the current altimeter setting in inches of mercury.
Make sure the setting you provide is between 28.00 and 31.50, with a precision of two decimal places.
This field is required to perform the calculations accurately.

Step 5: View the Results

Once all required fields are filled out, the calculator will automatically compute and display the results in the following fields:

  • Vapor Pressure: This value is calculated using the dewpoint and is expressed in hPa (hectopascals),
    shown with two decimal points.
  • Relative Humidity: Displayed as a percentage, this result gives you an overview of the moisture content
    in the air, with a precision of one decimal place.
  • Virtual Temperature: This represents a modified temperature reflecting moisture levels, shown in degrees Celsius
    with one decimal point.
  • Density Altitude: This is the main result, representing the density altitude in feet. The computation uses the
    pressure altitude and virtual temperature. It is presented as a whole number.

With this step-by-step guide, you should be able to effectively use the Density Altitude Calculator to obtain crucial atmospheric data.