Formula Sources

Water Vapour Pressure:

1. B210973EN-F, Section 8 Equations 20-21, 'Humidity Conversion Formulas', Vaisala, 2013
2. ISBN: 0-904457-24-9, Section 4.1 Equation 2, Section 10.3 Equation 12, 'A Guide to the Measurement of Humidity', National Physical Laboratory, 1996

Saturation Vapour Pressure - B210973EN-F, Section 2 Equations 2-5, Section 9 Equations 23-25, 'Humidity Conversion Formulas', Vaisala, 2013

Dew Point - B210973EN-L, Section 4.2, 'Humidity Conversions', Vaisala, 2021

Frost Point - B210973EN-L, Section 4.3, 'Humidity Conversions', Vaisala, 2021

Relativy Humidity - B210973EN-F, Section 3.2 Equation 11, 'Humidity Conversion Formulas', Vaisala, 2013

PPMv - B210973EN-F, Section 8 Equations 18 & 20, 'Humidity Conversion Formulas', Vaisala, 2013

PPMw - B210973EN-F, Section 8 Equations 19 & 21, 'Humidity Conversion Formulas', Vaisala, 2013

Absolute Humidity - B210973EN-F, Section 7 Equation 17, 'Humidity Conversion Formulas', Vaisala, 2013

Mixing Ratio - B210973EN-F, Section 5 Equations 14-15, 'Humidity Conversion Formulas', Vaisala, 2013

Wet Bulb - B210973EN-F, Section 9.2, 'Humidity Conversion Formulas', Vaisala, 2013

Enthalpy - B210973EN-F, Section 6 Equation 16, 'Humidity Conversion Formulas', Vaisala, 2013

Water Activity - B210973EN-F, Section 1 Equation 1, 'Humidity Conversion Formulas', Vaisala, 2013