Dew Point Calculator
Dew point ≈ T − (100−RH)/5 (Magnus approximation)Using Magnus formula: ≈ 16.7°C
Free online tool
Dew Point Calculator
Enter the temperature in Celsius and relative humidity percentage.
Instant calculation
Dew Point Calculator
Enter the temperature in Celsius and relative humidity percentage.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter temperature
Type the air temperature in degrees Celsius.
- 02
Enter humidity
Type the relative humidity percentage.
- 03
See dew point
Calculate to see the dew point temperature.
The formula
How this calculation works
The temperature at which air becomes saturated and water vapor condenses.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
25°C at 60% humidity — dew point?
Using Magnus formula: ≈ 16.7°C≈ 16.7°CCommon questions
Questions about this calculation
What is the Dew Point Calculator?
The Dew Point Calculator helps you calculate the dew point temperature from air temperature and humidity. Enter your values and select Calculate to get an instant result.
How is the result calculated?
The temperature at which air becomes saturated and water vapor condenses.
Can you show an example?
Example: 25°C at 60% humidity — dew point? — ≈ 16.7°C.
Is my data saved when I use the Dew Point Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Dew Point Calculator free to use?
Yes. The Dew Point Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
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