In the application as hydrogen carrier, ammonia needs to be cracked so that hydrogen is released. This reaction is endothermal and volume expanding and thus benefits from high temperatures of up to 1000 °C and low or even atmospheric pressure . This range of realistic operating parameters shall be the basis of this study, as we aim to provide a freely available and ready to use tool for a common and relevant application that the reader can intuitively and easily use to speed up equilibrium calculations with an average error of less than 5 %.