Absolute Humidity Calculator
Convert relative humidity and temperature into absolute humidity in grams per cubic metre with this free calculator, right in your browser.
Enter Values
Range 0–100
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.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.