Dew Point Calculator
Calculate dew point, moisture comfort, and absolute humidity
Calculation Steps
How Dew Point Is Calculated
The calculator uses the Magnus formula to estimate the condensation point from temperature and humidity.
Moisture content
Dew point is tied to actual moisture in the air, so it often describes humidity comfort better than relative humidity alone.
Comfort bands
Dew points below about 55°F often feel dry or comfortable. Around 65°F feels humid, and 70°F or higher feels very humid.
Condensation planning
When surfaces cool near the dew point, condensation becomes more likely on windows, tools, and outdoor gear.
Dew Point Examples
Compare how humidity changes the dew point at the same air temperature.
Comfortable indoor air
70°F with 50% humidity gives a dew point near 50°F
Humid summer day
86°F with 70% humidity gives a dew point near 75°F
Metric weather reading
25°C with 60% humidity gives a dew point near 17°C
Dew Point Calculator FAQ
Common questions about dew point, humidity, comfort, and condensation.
What is dew point?
Dew point is the temperature air must cool to for water vapor to condense. Higher dew points mean more moisture in the air.
How is dew point different from relative humidity?
Relative humidity changes with temperature. Dew point is a more direct measure of actual moisture content, so it often describes comfort better.
What dew point feels humid?
Many people start noticing humidity around a dew point near 60°F. Dew points around 65°F feel humid, and 70°F or higher often feels very humid.
Can dew point be higher than air temperature?
For normal weather observations, dew point is at or below the air temperature. At 100% relative humidity, the two values are essentially the same.
Is this a forecast?
No. It calculates dew point from the temperature and humidity you enter. Use local weather sources for forecasts and outdoor safety decisions.