/// Introduction ///
Many processes in the hydrogen sector require complex calculations, since simplifying hydrogen as an ideal gas should be avoided due to the high operating pressures. Additional factors include, for example, the reverse Joule-Thomson effect and the often cryogenic process temperatures.
The tools on this website are designed to perform calculations directly online using real data in order to obtain precise results with little effort.
A complete overview of all previous calculation aids and information can be found at „Tools“. If you have any questions or suggestions for improvement, please do not hesitate to contact me at "Contact" .
/// News ////// Latest Updates ///
23/06/26: Update of article “Cell Voltage and Current of Electrolysis” (supplementary explanations) (Ergänzende Erklärungen)
12/01/26: : New calculator “Permeation Coefficient Converter”
18/07/25: Implementation of the English-language version of some tools
21/04/24: New article “Heating Value vs Calorific Value”
18/03/24: New article “Cell Voltage and Current of Electrolysis”
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/// Popular Topics ////// Featured Articles ///
This calculator processes the inputs "temperature", "pressure" and "volume" to calculate the mass of a certain amount of hydrogen. The calculation is carried out under real conditions so that exact values can be output even under high pressures.
The reverse Joule-Thomson effect in hydrogen means that the gas heats up instead of cooling down when it is throttled. The calculator linked in the article processes the inputs "starting temperature", "starting pressure" and "final pressure" to calculate the temperature after throttling.
This article shows how the two energy content values differ from each other and which value should ultimately be used for calculations in electrochemical processes such as in fuel cells.
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