Dew Point Calculator

Dew Point Calculator is a clean, fast tool for finding the dew point from air temperature and relative humidity — completely offline. Type a temperature, drag the humidity slider, and read the dew point and how the air actually feels the moment you change a value.

WHAT YOU CAN DO
• Calculate the dew point from temperature and relative humidity
• Work in Celsius or Fahrenheit, for both input and output
• See a plain-language comfort rating: Dry, Comfortable, Sticky, Uncomfortable or Oppressive
• View the dew point in the other unit at a glance
• Load preset conditions — Tropical, Desert, Indoor and more — with one tap

WHY DEW POINT
Relative humidity alone does not tell you how muggy the air feels. The dew point is an absolute measure of the moisture in the air: the closer it is to the actual temperature, the more humid it feels. It is also what tells you when dew, condensation and fog are likely to form.

LEARN AS YOU GO
A built-in Learn tab explains, in plain language, what the dew point is, how the comfort scale works, and why clear, calm nights with a high dew point so often bring morning fog.

HOW IT WORKS
Calculations use the well-known Magnus formula (a = 17.625, b = 243.04), accurate to within a few tenths of a degree across everyday weather conditions.

ACCURACY
Results are estimates for general and educational use and are not a substitute for calibrated instruments or official weather forecasts. Always follow professional guidance for safety-critical or scientific decisions.

PRIVACY
The app collects no personal data and works fully offline — your inputs never leave your device. Ads are served by Google AdMob, which may use an advertising identifier as described in Google's policies.

Light and dark themes, a tiny download, and no clutter. Download Dew Point Calculator and measure the moisture in the air with confidence.