How do you calculate the frost point?

The frost point, or frost point temperature, can be calculated using the dew point temperature and atmospheric pressure. One common method is to use the formula for the saturation vapor pressure, which relates temperature and pressure, along with the dew point. The frost point occurs when the air is saturated with moisture and the temperature drops to the point where water vapor begins to condense into ice. For practical calculations, using a psychrometric chart or specific frost point calculators can also provide accurate results.