Absolute Humidity Calculator

Absolute humidity measures the actual amount of water vapor present in the air, regardless of temperature. This calculator helps you determine absolute humidity based on temperature and relative humidity.

Input Parameters

Calculation Results

Calculation Formula

Absolute Humidity (g/m³) = 621.97 * (e / (1013.25 - e)) * (273.15 / (273.15 + T))

Where:
e = Saturated vapor pressure (Pa) = 6.112 * exp((17.67 * T) / (T + 243.5))
T = Temperature (K)
Absolute Humidity = Actual water vapor content in air (g/m³)

Absolute Humidity Calculator Usage Guide

Learn how to use the Absolute Humidity Calculator and understand its working principles

How to Use the Calculator

  1. Enter the temperature in degrees Celsius (°C).
  2. Enter the relative humidity as a percentage (%).
  3. Click the "Calculate" button to compute the absolute humidity.
  4. The result will be displayed in grams per cubic meter (g/m³).

Understanding Absolute Humidity

Absolute humidity refers to the actual amount of water vapor present in the air, regardless of temperature. Unlike relative humidity, which depends on the temperature, absolute humidity gives a direct measure of water vapor content.

Formula Explanation

The calculator uses the following formula to calculate absolute humidity:

H = 621.97 * (e / (1013.25 - e)) * (273.15 / (273.15 + T))

Where:

  • H = Absolute humidity (g/m³)
  • e = Saturated vapor pressure (Pa) = 6.112 * exp((17.67 * T) / (T + 243.5))
  • T = Temperature (K)

Example

If the temperature is 25°C and the relative humidity is 50%, the absolute humidity would be approximately 9.68 g/m³.