75 F, 60% RH
- Celsius
- 15.6541840794 C
- Air temperature
- 75 F
- Humidity
- 60%
Dew Point Calculator
Use this free dew point calculator to estimate dew point in Fahrenheit and Celsius from temperature and relative humidity.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Convert Fahrenheit to Celsius.
- Use the Magnus approximation with temperature and relative humidity.
- Convert the dew point back to Fahrenheit for display.
How to use the dew point calculator
- Enter air temperature in Fahrenheit and relative humidity percent.
- Press Calculate dew point to estimate dew point in Fahrenheit and Celsius.
- Use dew point to understand moisture comfort better than relative humidity alone.
- Official forecasts and instruments can differ from this approximation.
Common uses
Estimate dew point from weather readings.
Compare humidity comfort more clearly than relative humidity alone.
Convert dew point between Fahrenheit and Celsius.
Use with heat index for weather context.
Examples
Dew point estimate
Lower dew point
Higher dew point estimate
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Dew Point Calculator?
Use it when your task matches one of these common needs: Estimate dew point from weather readings. Compare humidity comfort more clearly than relative humidity alone. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Dew Point Calculator doing with my inputs?
In plain language: The calculator converts Fahrenheit to Celsius, uses the Magnus approximation with relative humidity, then converts the dew point back to Fahrenheit. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
This is an approximation from temperature and relative humidity. Instrument readings and official forecasts can differ. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.
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