Dew Point Calculator
Find the dew point from temperature and relative humidity.
The real measure of humidity
Relative humidity is a percentage that shifts with temperature, but the dew point is an absolute measure of how much moisture the air holds. That is why meteorologists prefer it for describing how muggy it feels.
At 25°C and 60% humidity, the dew point is about 16.7°C — the point at which dew or fog would form. This calculator uses the Magnus formula, accurate for everyday conditions.
Accurate and private
It applies the Magnus formula in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is the dew point?
The temperature to which air must cool for its water vapor to condense. A higher dew point means the air feels more humid.
What formula is used?
The Magnus approximation, which is accurate across everyday temperatures and humidities.
How does it feel?
Dew points below 13°C feel comfortable, 16–18°C feels sticky, and above 21°C feels oppressive.
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