Online Calculation

Online Calculations

The online calculation service on this website was started with the aim to test the potential of this kind of web tool and to retrieve some user feedback.

It is currently limited to five common temperature dependent properties and the components that come with the free Explorer Version. For the future we are considering to optimize and extend this service to make it more applicable to practical engineering problems.

As we will not be able to extend the scope of components on a cost-free basis, we are evaluating ways to provide this extended service on a pre-paid basis for registered customers.

The current implementation of the online-calculation presents separate pages for each of the following properties in a new window:

The parameters for the equations have been fitted to experimental data from the Dortmund Data Bank and are not those delivered by DIPPR or PPDS.

Please refer to the Pure Component Property Regression Tutorial for further information about the equation forms.

Important Note

The results of the calculation do not describe the properties exactly. The parameters have been adjusted to a number of experimental data points which can be erroneous. A parameter regression minimizes the deviations between calculated and experimental data. This procedure can add a significant deviation between calculated and experimental data in addition to the experimental errors. The parameters are valid only inside the given temperature ranges.


This calculation service, including the parameters, is provided "as is". Although DDBST has made efforts that the parameters and the calculations are correct and accurate, DDBST makes no warranties of any kind, either expressed, implied, or statutory, including but not limited to warranties of usability for a particular purpose, or non-infringement. DDBST including its employees does not warrant that the parameters or the calculation will be error-free. DDBST including its employees is not liable for any direct, indirect, special, incidental or consequential damages arising out of the use - or the inability to use - any material on this site.