EAI WebApp v3.8
Weather/ NOTAMs & E6B Tools

- Dew Point & Relative Humidity -

These calculators convert between these units and give a rough estimate of cloud base (AGL) and freezing level.
Relative humidity is helpful assessing the effects of high humidity on humans (Heat Index) and estimating cloud bases.

Relative Humidity
Temp (OAT) °F  °C
Dew Point @  
Relative Humidity %
Wet-Bulb Temp °C
Est. Cloud Temp °C
Est. Cloud Base Feet
Est. Cloud Ice Lvl. Feet

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To obtain Dew Point from Relative Humidity, use this calculator.

Dew Point
Temp (OAT) °F  °C
Rel. Humidity %
Dew Point °F °C
Wet-Bulb Temp °C
Est. Cloud Temp °C
Est. Cloud Base Feet
Est. Cloud Ice Lvl. Feet

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See the image below for a graphical conversion scale.

Dew Point Conversion

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