Based on three known physical quantities (pressure, temperature, and a humidity measurand), the E+E Humidity Calculator computes up to 15 humidity-related parameters such as the dew point, frost point, absolute humidity, enthalpy, etc. A significant difference to other humidity calculators is that the E+E Humidity Calculator also takes the measurement uncertainty into account and therefore ensures particularly practical results.

In addition to computing and converting physical humidity quantities, the E+E Humidity Calculator can also be used to simulate the behaviour of the humidity values as pressure and temperature conditions change. For realistic calculations, air and 10 other gases (including argon, CO₂, helium, and methane) can be selected as the carrier medium.

The formulae for conversion, including computing the uncertainty, are based on the common humidity theories and have been validated by the accredited E+E Elektronik calibration laboratory.

In addition to calculating the humidity, the E+E Humidity Calculator features a separate calculation mode for computing the dew point in compressed air systems. This makes it easy to determine the change in dew point temperature in relation to the gas pressure.