Dew Point Calculator
Calculate dew point from temperature and humidity.
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How It Works
Calculates dew point using Magnus formula. Dew point is temperature at which water vapor condenses. Higher dew point = more moisture in air = feels more humid.
Formula
Magnus formula dew pointQuick Reference
Common calculations — results you can verify instantly.
30°C, 70% RH
Magnus formula
Dew point ≈ 23.9°C
20°C, 60% RH
Magnus formula
Dew point ≈ 12.0°C
Comfortable range
Dew point guideline
Below 16°C
Tips & Shortcuts
Above 16C feels humid. Above 21C uncomfortable. Above 24C oppressive.
Dew point more useful than RH for comfort assessment.
Common Mistakes
Confusing RH with dew point
50% RH at 30C has same dew point as 100% RH at 20C.
Same RH at different temperatures
High RH at low temp feels fine. Same RH at high temp is oppressive.
Frequently Asked Questions
Temperature at which air saturates and water condenses.
Below 10C: dry. 10-16C: comfortable. 16-21C: humid. Above 21C: oppressive.
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