Calculate Grains of Water and HP Correction

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These equations are for recreation only.

This calculator uses the Motorsports Standard Atmosphere (MSA). (Not ISA - International Standard Atmosphere)
Grains - Grains of water vapor per pound of dry air
The HP Correction is a better determination of ET than the DA (Density Altitude).
I have included them for your benefit.

Calculate Grains of Water and HP Correction
Elevation : Feet   Meters
Temperature: Fahrenheit   Celcius
Relative Humidity (%):
Actual Barometer: In/Hg   mm/hg
Input DATA Please

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