---
title: LJPcalc - Liquid Junction Potential (LJP) Calculator
description: LJPcalc is an application for calculating liquid junction potentitals between two solutions with known ion concentrations
---
# LJPcalc
**LJPcalc is a free and open source liquid junction potential (LJP) calculator.** LJPcalc can be [run in the browser](app) or [downloaded for Windows](download). See the [theory page](theory.md.html) for usage tips, advanced considerations, and suggestions for applications related to biology and electrophysiology.
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<div><a href='download'><img class="img-fluid shadow" src='graphics/LJPcalc.png' /></a></div>
<div><a class="btn btn-primary btn-lg m-4" href="download">Download</a></div>
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<div><a href='app'><img class="img-fluid shadow" src='graphics/web-app.png' /></a></div>
<div><a class="btn btn-primary btn-lg m-4" href="app">Launch</a></div>
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## Citing LJPcalc
If LJPcalc facilitated your research, consider citing this project by name so it can benefit others too:
> _Liquid junction potential was calculated according to the stationary Nernst-Planck equation using LJPcalc¹_
> <br><br>
> [1] Harden, SW and Brogioli, D (2020). LJPcalc [Online]. Available: https://swharden.com/software/LJPcalc, Accessed on: Jan 1, 2020.
## Authors
LJPcalc was created by [Scott W Harden](http://swharden.com/) in 2020. LJPcalc began as C# port of [JLJP](https://github.com/swharden/JLJP), a Java application by [Doriano Brogioli](https://sites.google.com/site/dbrogioli/) originally published [on SourceForge](http://jljp.sourceforge.net/) in 2013. LJPcalc uses calculation methods described by [Marino et al., 2014](https://arxiv.org/abs/1403.3640).
