Dew Point Calculator
Estimates dew point in Celsius from air temperature and relative humidity using the Magnus approximation.
How it works
Estimates dew point in Celsius from air temperature and relative humidity using the Magnus approximation.
Formula and assumptions
The Magnus approximation estimates the temperature at which air reaches saturation. Results depend on the entered relative humidity and are approximate, especially outside typical weather conditions.
Example
Use the sample values, calculate, and change one input at a time.
Frequently asked questions
Are results exact? Results depend on the assumptions and inputs above.
Can I use this for professional decisions? Verify critical results independently.
Related calculators
Frequently asked questions
What does dew point mean?
It is the temperature at which air would reach saturation at its current moisture content.
What should I check before relying on the result?
Confirm the input units and assumptions described above; independently verify safety-critical, medical, financial or professional decisions.