Calculators

Here is a selection of calculators used in meteorology and hydrology applications.

Dew Point Calculator

Dew Point is the temperature at which water in the air will condense (or freeze), assuming the water content of the air does not change.

Temperature
Relative Humidity
Dew Point

Wind Chill Calculator

Wind chill is the perceived temperature of the air against exposed skin, considering the actual temperature and wind speed. Wind chill is a somewhat subjective measure, and is only defined for temperatures below 50 °F and wind speeds above 3.0 mph. For higher temperatures, use Heat Index instead.

Temperature
Wind Speed
Wind Chill

Heat Index Calculator

Heat Index is an indicator of how hot the air feels in the shade, provided the temperature and humidity. This is valid, in part because higher humidity makes it more difficult for the body to cool itself with sweat. Heat Index can be misleading when performating activities in direct sunlight, and heat index does not take into account factors such as wind.

Heat Index is only defined for temperatures above 79 °F and humidity above 40%.

Temperature
Relative Humidity
Heat Index

Wet Bulb Calculator

Wet Bulb Temperature is the lowest temperature that can be reached by evaporating water into the air. It is affected by the initial temperature, humidity, and to a small extent, the atmospheric pressure.

Temperature
Relative Humidity
Atmospheric Pressure
Wet Bulb Temperature

Altitude to Pressure Calculator

Calculates the normal atmospheric pressure for a given altitude.

Altitude
Normal Pressure

Pressure to Altitude Calculator

Calculates the altitude at which a normal atmospheric pressure occurs.

Normal Pressure
Altitude

Altitude to Boiling Point Calculator

Calculates the boiling point of water at a given altitude.

Altitude
Boiling Point

Pressure to Boiling Point Calculator

Calculates the boiling point of water at a given pressure.

Pressure
Boiling Point