Magnus Dew Point Estimate Calculator
Estimate dew point using a Magnus water-vapor approximation in the explicitly supported 0–50°C temperature range.
Your result
EVERYDAYEnter your values and select calculate.
On this page How it works & practical examples
How to use the Magnus Dew Point Estimate Calculator
Estimate dew point using a Magnus water-vapor approximation in the explicitly supported 0–50°C temperature range. Relative humidity must be above zero.
The calculation
Worked example
20°C air at 50% relative humidity gives an approximate dew point of 9.2611°C.
Assumptions and limits
Not a laboratory humidity calibration or frost-point model. Coefficient choices, sensor error and very low humidity affect accuracy; no meteorological data is fetched.
Common questions
Which inputs should I use?
Estimate dew point using a Magnus water-vapor approximation in the explicitly supported 0–50°C temperature range. Relative humidity must be above zero.
What does the result exclude?
Not a laboratory humidity calibration or frost-point model. Coefficient choices, sensor error and very low humidity affect accuracy; no meteorological data is fetched.