Relative Humidity Calculator

This Relative Humidity Calculator allows users to input air temperature, dew point temperature, and atmospheric pressure to calculate the saturated vapor pressure, actual vapor pressure, relative humidity, and absolute humidity of the air.

Use Our Relative Humidity Calculator

Using the Relative Humidity Calculator

The Relative Humidity Calculator is a tool designed to help you determine various characteristics of the air’s moisture content based on temperature, dew point, and atmospheric pressure. Follow this detailed guide to accurately use the calculator.

Step 1: Enter Air Temperature

Start by locating the field labeled Air Temperature (°C). This is where you will input the current air temperature.

  • Ensure the air temperature is within the range of -50 to 100°C.
  • Use decimal increments of 0.1 for more precision.
  • This field is required, so make sure to enter a value.

Step 2: Enter Dew Point Temperature

Next, find the input field labeled Dew Point Temperature (°C), where you will enter the dew point value.

  • The acceptable range for the dew point is also -50 to 100°C.
  • Use a decimal step of 0.1 for best accuracy.
  • This field is mandatory, so it cannot be left blank.

Step 3: Enter Atmospheric Pressure

Now, locate the field labeled Atmospheric Pressure (hPa) to input the atmospheric pressure.

  • Enter a value between 800 and 1200 hPa.
  • For precision, use a 0.1 increment.
  • This field is required to proceed with calculations.

Step 4: Calculating Results

Upon entering all necessary inputs, the calculator will automatically compute and display four results:

  • Saturated Vapor Pressure: Calculated using the air temperature and expressed in hPa with two decimal places.
  • Actual Vapor Pressure: Based on the dew point temperature, this result is in hPa with two decimal places.
  • Relative Humidity: Presented as a percentage (accurate to one decimal point), it compares the actual vapor pressure to the saturated vapor pressure.
  • Absolute Humidity: Expressed in grams per cubic meter (g/m³) and accurate to two decimal places, indicating the total mass of water vapor in the air.

By following these steps and ensuring that all required fields are completed with valid data, you can effectively utilize the Relative Humidity Calculator to understand the moisture content in the air.