How to use: Calculate dew point temperature - the point at which air becomes saturated and water vapor condenses. Enter Temperature and Relative Humidity percentage, then select temperature unit. Results show dew point temperature. Higher dew point = more moisture in air. Comfort levels: Dew point <50°F = dry/comfortable, 50-60°F = comfortable, 60-65°F = slightly humid, 65-70°F = humid/uncomfortable, >70°F = oppressive/very humid. Dew point determines: fog formation (when temp equals dew point), frost risk (dew point below 32°F), condensation on windows/surfaces, and perceived comfort. More accurate than relative humidity for measuring atmospheric moisture. Critical for HVAC design, agriculture, aviation, and weather forecasting.