Actual Mixing Ratio Enter a temperature and a pressure or a dewpoint and a pressure or both a temperature and a dewpoint and a pressure: If you want the actual mixing ratio enter the dewpoint: Actual mixing ratio: Fahrenheit Celsius Kelvin grams per kilogram If you want the saturated mixing ratio enter the air temperature: Fahrenheit Celsius Kelvin Enter your actual station pressure (not the altimeter setting): in of mercury mm of mercury millibars (hPA)