What is this calculator?
Estimate dew-point temperature with a Magnus approximation.
What can you use it for?
Use it for practical planning, conversions, measurement or checking the result described here. Estimate dew-point temperature with a Magnus approximation.
How to use it
- Enter air temperature (°c).
- Enter relative humidity (%).
- Select Calculate (or Generate for random tools).
- Read the answer and any additional results below the form. Check the units and the limits of the method.
Formula and method
The formula uses the units and definitions shown above. Each input is substituted before the arithmetic is evaluated; the calculated output is rounded for display.
Worked example
Air temperature (°C): 25, Relative humidity (%): 60. The result is 16.69766352 °C (result).
Assumptions and limits
Approximation over water in the entered temperature range, not a direct humidity measurement.
Frequently asked questions
What inputs does the Dew Point Calculator need?
Use air temperature (°c), relative humidity (%). Read the answer and any additional results below the form. Check the units and the limits of the method.
What assumptions apply to the Dew Point Calculator?
Approximation over water in the entered temperature range, not a direct humidity measurement.