Dew Point Calculator

Celsius

Air Temperature (°C)

Relative Humidity (%)

Fahrenheit

Air Temperature (°F)

Relative Humidity (%)

Formula

Dp = 237.7 × α / (17.27 - α), where α = 17.27T/(237.7+T) + ln(RH/100)

Frequently Asked Questions

What is dew point?

Dew point is the temperature at which air becomes saturated and water vapor condenses into dew. A dew point above 65°F (18°C) feels humid, above 70°F (21°C) is uncomfortable, and above 75°F (24°C) is oppressive.

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