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Distribution of Relaxation Times

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jwDRT info

Did you know?

RelaxIS is our stand-alone EIS analysis software.

  • Direct import of many raw EIS data file formats.
  • Hassle-free fitting to equivalent circuits and other models, with Auto-Fitting capabilities!
  • Many advanced features like KK, DRT or residual analysis.
  • Built in further techniques like VFT- and Arrhenius fitting.

Click here, to learn more!

EIS Data

Please enter data into the columns below:

  • You need to use the US number format
    • Decimal separator: .
    • E.g: 1.353e-11
  • When importing from file, or pasting from clipboard: Columns: Frequency || Z' || Z'', Tab-delimited
  • Maximum size of 500 kB
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Z' values
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Z'' values
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Example 1
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jwDRT info

Did you know?

More DRT options are available in the full RelaxIS software!

  • Additional basis functions.
  • Adjustable interpolation options.
  • Ability to calculate multiple DRTs at once.
  • Automatic peak picking and correlation.

Click here, to learn more!

DRT Settings

Basis function:

Should I?

jwDRT info


Do you have questions or suggestions?
Please, feel free to contact us!

DRT Results

Below you can find the calculated DRT, given by the distribution Gamma as a function of the time constant, tau.

The rhd instruments team hopes, that you found this tool useful for your studies.

In our full RelaxIS software you can perform DRT and many other EIS analysis techniques much more comfortably,
even for large datasets!

Feel free to contact us for a free trial Version!


Raw Data:

(for Copy&Paste)

Select Data

Set Options

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Privacy Policy

To keep it brief and simple:

Any raw data you submit to our server while using the RelaxIS DRT application is only used temporarily in volatile memory for the purpose of calculating the results and is then discarded immediately.

No person can manually inspect your data in any way.

Data we do store

The server keeps connection logs containing the following fields

  • Date of the request
  • Anonymised IP address and User Agent (e.g. browser type) of the remote endpoint
  • Type of request, e.g. POST/GET
  • Type of task to be performed by the server (plotting or DRT calculation)

These logs are only used for internal performance monitoring and usage statistics. The data is not shared with any third-parties.

Please also refer to our dedicated privacy policy or feel free to contact us if you have any questions.

You can withdraw your agreement at any time for the future via E-Mail to This email address is being protected from spambots. You need JavaScript enabled to view it..


This DRT implementation is based on ideas and methods introduced by the Ciucci group of the The Hong Kong University of Science and Technology.

For details please refer to their original publications

Ting Hei Wan, Mattia Saccoccio, Chi Chen, Francesco Ciucci, Influence of the Discretization Methods on the Distribution of Relaxation Times Deconvolution: Implementing Radial Basis Functions with DRTtools, Electrochimica Acta, Volume 184, 1 December 2015, Pages 483-499, ISSN 0013-4686, DOI: 10.1016/j.electacta.2015.09.097.

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