Absolute Humidity Calculator
Convert relative humidity and temperature into absolute humidity in grams per cubic metre with this free calculator, right in your browser.
100% FreeRuns in your browserIntermediate
Enter Values
Range 0–100
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
- Wind Chill Calculator
- Dew Point Calculator
- Apparent Temperature Calculator
- Cloud Base Height Calculator
- Heat Index Calculator
- Humidity from Wet & Dry Bulb Calculator
Explore more in Weather & Environmental Monitoring.
Cite this tool
Zerdly. (2026). Absolute Humidity Calculator. Retrieved from https://www.zerdly.com/tools/absolute-humidity-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.