Absolute Humidity Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserIntermediate
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter the air temperature and relative humidity.
- Read the absolute humidity.
How it works
It combines the saturation vapour pressure at the temperature with the relative humidity to get grams of water per m³.
Worked example
25 °C, 60% RH. ≈ 13.8 g/m³.
Common mistakes
- Confusing absolute humidity (g/m³) with relative humidity (%).
- Entering RH above 100%.
Frequently asked questions
Why use absolute humidity?
It tells you the actual amount of moisture in the air, independent of temperature — useful for drying, storage and HVAC.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.