diff --git a/tools/lammps-gui/CMakeLists.txt b/tools/lammps-gui/CMakeLists.txt
index aee806c81a..d4b97ea231 100644
--- a/tools/lammps-gui/CMakeLists.txt
+++ b/tools/lammps-gui/CMakeLists.txt
@@ -190,6 +190,8 @@ set(PROJECT_SOURCES
   fileviewer.h
   preferences.cpp
   preferences.h
+  runwham.cpp
+  runwham.h
   setvariables.cpp
   setvariables.h
   slideshow.h
diff --git a/tools/lammps-gui/lammpsgui.cpp b/tools/lammps-gui/lammpsgui.cpp
index 59e8017fc0..df5571587a 100644
--- a/tools/lammps-gui/lammpsgui.cpp
+++ b/tools/lammps-gui/lammpsgui.cpp
@@ -22,6 +22,7 @@
 #include "lammpsrunner.h"
 #include "logwindow.h"
 #include "preferences.h"
+#include "runwham.h"
 #include "setvariables.h"
 #include "slideshow.h"
 #include "stdcapture.h"
@@ -212,6 +213,7 @@ LammpsGui::LammpsGui(QWidget *parent, const QString &filename) :
     connect(ui->actionRun_Buffer, &QAction::triggered, this, &LammpsGui::run_buffer);
     connect(ui->actionRun_File, &QAction::triggered, this, &LammpsGui::run_file);
     connect(ui->actionStop_LAMMPS, &QAction::triggered, this, &LammpsGui::stop_run);
+    connect(ui->actionRun_WHAM, &QAction::triggered, this, &LammpsGui::run_wham);
     connect(ui->actionSet_Variables, &QAction::triggered, this, &LammpsGui::edit_variables);
     connect(ui->actionImage, &QAction::triggered, this, &LammpsGui::render_image);
     connect(ui->actionLAMMPS_Tutorial, &QAction::triggered, this, &LammpsGui::tutorial_web);
@@ -1848,6 +1850,13 @@ void LammpsGui::edit_variables()
     }
 }
 
+void LammpsGui::run_wham()
+{
+    RunWHAM do_run(this);
+    do_run.setFont(font());
+    do_run.exec();
+}
+
 void LammpsGui::findandreplace()
 {
     FindAndReplace find(ui->textEdit, this);
diff --git a/tools/lammps-gui/lammpsgui.h b/tools/lammps-gui/lammpsgui.h
index cb61f368a5..ecb6335ab9 100644
--- a/tools/lammps-gui/lammpsgui.h
+++ b/tools/lammps-gui/lammpsgui.h
@@ -111,6 +111,7 @@ private slots:
     void findandreplace();
     void run_buffer() { do_run(true); }
     void run_file() { do_run(false); }
+    void run_wham();
 
     void edit_variables();
     void render_image();
diff --git a/tools/lammps-gui/lammpsgui.ui b/tools/lammps-gui/lammpsgui.ui
index c6dbd6a507..390db39e50 100644
--- a/tools/lammps-gui/lammpsgui.ui
+++ b/tools/lammps-gui/lammpsgui.ui
@@ -75,6 +75,8 @@
     <addaction name="actionRun_File"/>
     <addaction name="actionStop_LAMMPS"/>
     <addaction name="separator"/>
+    <addaction name="actionRun_WHAM"/>
+    <addaction name="separator"/>
     <addaction name="actionSet_Variables"/>
     <addaction name="separator"/>
     <addaction name="actionImage"/>
@@ -287,6 +289,14 @@
     <string>Ctrl+/</string>
    </property>
   </action>
+  <action name="actionRun_WHAM">
+   <property name="icon">
+    <iconset theme=":/icons/system-run.png"/>
+   </property>
+   <property name="text">
+    <string>Run &amp;WHAM Utility</string>
+   </property>
+  </action>
   <action name="actionImage">
    <property name="icon">
     <iconset theme=":/icons/emblem-photos.png"/>
diff --git a/tools/lammps-gui/runwham.cpp b/tools/lammps-gui/runwham.cpp
new file mode 100644
index 0000000000..d155992b07
--- /dev/null
+++ b/tools/lammps-gui/runwham.cpp
@@ -0,0 +1,87 @@
+/* ----------------------------------------------------------------------
+   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
+   https://www.lammps.org/, Sandia National Laboratories
+   LAMMPS development team: developers@lammps.org
+
+   Copyright (2003) Sandia Corporation.  Under the terms of Contract
+   DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
+   certain rights in this software.  This software is distributed under
+   the GNU General Public License.
+
+   See the README file in the top-level LAMMPS directory.
+------------------------------------------------------------------------- */
+
+#include "runwham.h"
+
+#include <QDialogButtonBox>
+#include <QGridLayout>
+#include <QIcon>
+#include <QLabel>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QSizePolicy>
+
+RunWHAM::RunWHAM(QWidget *parent) : QDialog(parent)
+{
+    int irow     = 0;
+    auto *layout = new QGridLayout;
+    auto *top    = new QLabel("Run WHAM Utility:");
+    layout->addWidget(top, irow++, 0, 1, 2, Qt::AlignHCenter);
+
+    auto *label = new QLabel("Units: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    auto *field = new QLineEdit("real");
+    layout->addWidget(field, irow++, 1, 1, 1);
+    label = new QLabel("Mininum value: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    field = new QLineEdit("");
+    layout->addWidget(field, irow++, 1, 1, 1);
+    label = new QLabel("Maximum value: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    field = new QLineEdit("");
+    layout->addWidget(field, irow++, 1, 1, 1);
+    label = new QLabel("Number of bins: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    field = new QLineEdit("50");
+    layout->addWidget(field, irow++, 1, 1, 1);
+    label = new QLabel("Tolerance: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    field = new QLineEdit("1.0e-8");
+    layout->addWidget(field, irow++, 1, 1, 1);
+    label = new QLabel("Temperature: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    field = new QLineEdit("300.0");
+    layout->addWidget(field, irow++, 1, 1, 1);
+    label = new QLabel("Metadata file: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    field = new QLineEdit("");
+    layout->addWidget(field, irow++, 1, 1, 1);
+    label = new QLabel("Output file: ");
+    layout->addWidget(label, irow, 0, 1, 1, Qt::AlignLeft);
+    field = new QLineEdit("");
+    layout->addWidget(field, irow++, 1, 1, 1);
+
+    auto *buttonBox = new QDialogButtonBox(QDialogButtonBox::Cancel);
+    auto *add       = new QPushButton("&Run WHAM");
+    add->setObjectName("run_wham");
+    buttonBox->addButton(add, QDialogButtonBox::ActionRole);
+    connect(add, &QPushButton::released, this, &RunWHAM::accept);
+    connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
+
+    layout->addWidget(buttonBox, irow++, 0, 1, 2, Qt::AlignHCenter);
+    setLayout(layout);
+    setWindowIcon(QIcon(":/icons/lammps-icon-128x128.png"));
+    setWindowTitle("LAMMPS-GUI - Run WHAM Utility");
+    resize(300, 200);
+}
+
+void RunWHAM::accept()
+{
+    // assemble command line and run WHAM
+    fprintf(stderr, "Running WHAM\n");
+    QDialog::accept();
+}
+
+// Local Variables:
+// c-basic-offset: 4
+// End:
diff --git a/tools/lammps-gui/runwham.h b/tools/lammps-gui/runwham.h
new file mode 100644
index 0000000000..ab8370273f
--- /dev/null
+++ b/tools/lammps-gui/runwham.h
@@ -0,0 +1,34 @@
+/* -*- c++ -*- ----------------------------------------------------------
+   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
+   https://www.lammps.org/, Sandia National Laboratories
+   LAMMPS development team: developers@lammps.org
+
+   Copyright (2003) Sandia Corporation.  Under the terms of Contract
+   DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
+   certain rights in this software.  This software is distributed under
+   the GNU General Public License.
+
+   See the README file in the top-level LAMMPS directory.
+------------------------------------------------------------------------- */
+
+#ifndef RUN_WHAM_H
+#define RUN_WHAM_H
+
+#include <QDialog>
+
+class RunWHAM : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit RunWHAM(QWidget *parent = nullptr);
+    ~RunWHAM() = default;
+
+private slots:
+    void accept() override;
+};
+
+#endif
+
+// Local Variables:
+// c-basic-offset: 4
+// End: